47
47
Sep 19, 2013
09/13
by
D. Seckel
texts
eye 47
favorite 0
comment 0
At energies above the threshold for $W$ production the process $\nu \gamma \to l W^+$ is competive with $\nu \nu$ scattering at the same center of mass energies. In a cosmological setting, absorption of ultra high energy neutrinos by the microwave photon background is comparable to absorption by the neutrino background. In passing through matter, the process $\nu \to l W^+$ will occur in the coulomb field of nuclei. For iron, the interaction rate per nucleon is roughly 20% of the charge current...
Source: http://arxiv.org/abs/hep-ph/9709290v1
44
44
Sep 24, 2013
09/13
by
D. Seckel
texts
eye 44
favorite 0
comment 0
Models for the source and propagation of cosmic rays are stressed by observations of cosmic rays with energies $E>10^{20}$ eV. A key discriminant between different models may be complementary observations of neutrinos with energies $E>10^{18}$ eV. Independent of the source of the cosmic rays, neutrinos are produced during propagation via the GZK mechanism. Event rates for GZK neutrinos are expected to be in the range of $0.01-0.1$ per km$^3$ yr, suggesting a detector mass in excess of 1...
Source: http://arxiv.org/abs/astro-ph/0103300v1
49
49
Sep 22, 2013
09/13
by
S. M. Barr; D. Seckel
texts
eye 49
favorite 0
comment 0
It is suggested that the true ground state of the world has exactly vanishing vacuum energy and that the cosmological constant that seems to have been observed is due to our region of the universe being stuck in a false vacuum, whose energy is split from the true vacuum by non-renormalizable operators that are suppressed by powers of the Planck scale. It is shown that conventional invisible axion models typically have the features needed to realize this possibility. In invisible axion models...
Source: http://arxiv.org/abs/hep-ph/0106239v1
44
44
Sep 20, 2013
09/13
by
G. Raffelt; D. Seckel; G. Sigl
texts
eye 44
favorite 0
comment 0
In a nuclear medium, spin-dependent forces cause the nucleon spins to fluctuate with a rate $\Gamma_\sigma$. We have previously shown that as a consequence the effective axial-current neutrino-nucleon scattering cross section is reduced. Here, we calculate this reduction explicitly in the perturbative limit $\Gamma_\sigma\ll T$. By virtue of an exact sum rule of the spin-density structure function, we express the modified cross section in terms of the matrix element for neutrino-nucleon...
Source: http://arxiv.org/abs/astro-ph/9603044v1
41
41
Sep 19, 2013
09/13
by
K. S. Babu; I. Z. Rothstein; D. Seckel
texts
eye 41
favorite 0
comment 0
Majoron models provide neutrino masses via the spontaneous breaking of a global $U(1)$ symmetry. However, it may be argued that all global symmetries will be explicitly violated by gravitational effects. We show that it is possible to preserve most of the usual features of majoron models by invoking $U(1)_{B-L}$ to be a gauge symmetry and adding a second singlet scalar field. The majoron gets a small model dependent mass. The couplings of majorons to neutrinos may be of ordinary strength or may...
Source: http://arxiv.org/abs/hep-ph/9301213v1
46
46
Sep 23, 2013
09/13
by
K. S. Babu; S. M. Barr; D. Seckel
texts
eye 46
favorite 0
comment 0
By coupling axions strongly to a hidden sector, the energy density in coherent axions may be converted to radiative degrees of freedom, alleviating the ``axion energy crisis''. The strong coupling is achieved by mixing the axion and some other Goldstone boson through their kinetic energy terms, in a manner reminiscent of paraphoton models. Even with the strong coupling it proves difficult to relax the axion energy density through particle absorption, due to the derivative nature of Goldstone...
Source: http://arxiv.org/abs/hep-ph/9406308v2
55
55
Sep 18, 2013
09/13
by
S. Hussain; D. Marfatia; D. W. McKay; D. Seckel
texts
eye 55
favorite 0
comment 0
We examine the dependence of event rates at neutrino telescopes on the neutrino-nucleon cross section for neutrinos with energy above 1 PeV, and contrast the results with those for cosmic ray experiments. Simple scaling of the Standard Model cross sections leaves the rates of upward events essentially unchanged. Details, such as detector depth and cross section inelasticity, can influence rates. Numerical estimates of upward shower, muon and tau event rates in the IceCube detector confirm these...
Source: http://arxiv.org/abs/hep-ph/0606246v2
51
51
Sep 20, 2013
09/13
by
H. -T. Janka; W. Keil; G. Raffelt; D. Seckel
texts
eye 51
favorite 0
comment 0
In the hot and dense medium of a supernova (SN) core, the nucleon spins fluctuate so fast that the axial-vector neutrino opacity and the axion emissivity are expected to be significantly modified. Axions with $m_a\alt10^{-2}\,{\rm eV}$ are not excluded by SN~1987A. A substantial transfer of energy in neutrino-nucleon ($\nu N$) collisions is enabled which may alter the spectra of SN neutrinos relative to calculations where energy-conserving $\nu N$ collisions had been assumed near the...
Source: http://arxiv.org/abs/astro-ph/9507023v2
39
39
Sep 19, 2013
09/13
by
V. Agrawal; S. M. Barr; John F. Donoghue; D. Seckel
texts
eye 39
favorite 0
comment 0
One of the puzzles of the Standard Model is why the mass parameter which determines the scale of the Weak interactions is closer to the scale of QCD than to the Grand Unification or Planck scales. We discuss a novel approach to this problem which is possible in theories in which different regions of the universe can have different values of the physical parameters. In such a situation, we would naturally find ourselves in a region which has parameters favorable for life. We explore the whole...
Source: http://arxiv.org/abs/hep-ph/9801253v1
54
54
Sep 18, 2013
09/13
by
S. Iyer Dutta; M. H. Reno; I. Sarcevic; D. Seckel
texts
eye 54
favorite 0
comment 0
The photonuclear contribution to charged lepton energy loss has been re-evaluated taking into account HERA results on real and virtual photon interactions with nucleons. With large $Q^2$ processes incorporated, the average muon range in rock for muon energies of $10^9$ GeV is reduced by only 5% as compared with the standard treatment. We have calculated the tau energy loss for energies up to $10^9$ GeV taking into consideration the decay of the tau. A Monte Carlo evaluation of tau survival...
Source: http://arxiv.org/abs/hep-ph/0012350v1
59
59
Sep 22, 2013
09/13
by
V. Agrawal; S. M. Barr; J. F. Donoghue; D. Seckel
texts
eye 59
favorite 0
comment 0
In theories in which different regions of the universe can have different values of the the physical parameters, we would naturally find ourselves in a region which has parameters favorable for life. We explore the range of anthropically allowed values of the mass parameter in the Higgs potential, $\mu^2$. For $\mu^2 0$, baryon stability requires that $|\mu|
Source: http://arxiv.org/abs/hep-ph/9707380v2
42
42
Sep 18, 2013
09/13
by
D. P. Hogan; D. Z. Besson; J. P. Ralston; I. Kravchenko; D. Seckel
texts
eye 42
favorite 0
comment 0
We report an upper limit on the flux of relativistic monopoles based on the non-observation of in-ice showers by the Radio Ice Cherenkov Experiment (RICE) at the South Pole. We obtain a 95% C.L. limit of order 10^{-18}/(cm^2-s-sr) for intermediate mass monopoles of 10^7
Source: http://arxiv.org/abs/0806.2129v2
45
45
Sep 18, 2013
09/13
by
S. Razzaque; S. Seunarine; S. Chambers; D. Besson; D. McKay; J. Ralston; D. Seckel
texts
eye 45
favorite 0
comment 0
We reevaluate our published calculations of electromagnetic showers generated by GEANT 3.21 and the radio frequency pulses they produce in ice. We are prompted by a recent report showing that GEANT 3.21-modeled showers are sensitive to internal settings in the electron tracking subroutine. We report the shower and pulse characteristics obtained with different settings of GEANT 3.21 and with GEANT 4. The default setting of electron tracking in GEANT 3.21 we used in previous work speeds up the...
Source: http://arxiv.org/abs/astro-ph/0306291v1
56
56
Sep 24, 2013
09/13
by
J. Clem; W. Droege; P. A. Evenson; H. Fischer; G. Green; D. Huber; H. Kunow; D. Seckel
texts
eye 56
favorite 0
comment 0
We present results from the initial flight of our Balloon Air CHerenkov (BACH) payload. BACH detects air Cherenkov radiation from cosmic ray nuclei as coincident flashes in two optical modules. The flight (dubbed PDQ BACH) took place on April 22, 1998 from Ft. Sumner, New Mexico. During an exposure of 2.75 hours, with a typical threshold energy for iron nuclei of 2.2$\times10^{13}$ eV, we observed several events cleanly identifiable as iron group nuclei. Analysis of the data yields a new flux...
Source: http://arxiv.org/abs/astro-ph/0103397v1
58
58
Sep 19, 2013
09/13
by
RICE Collaboration; C. Allen; A. Bean; D. Besson; G. Frichter; S. Kotov; I. Kravchenko; D. McKay; T. Miller; L. Piccirillo; J. Ralston; D. Seckel; S. Seunarine; G. Spiczak
texts
eye 58
favorite 0
comment 0
RICE is designed to detect ultrahigh energy (>100 TeV) neutrinos from astrophysical sources. It will consist of an array of compact radio (100 to 1000 MHz) receivers buried in ice at the South Pole. During the 1995-96 and 1996-97 austral summers, several receivers transmitters were deployed in bore holes drilled for the AMANDA project, at depths of 141 to 260 m. This was the first in situ test of radio receivers in deep ice for neutrino astronomy.
Source: http://arxiv.org/abs/astro-ph/9709223v1
41
41
Sep 23, 2013
09/13
by
P. Allison; J. Beatty; P. Chen; A. Connolly; M. DuVernois; P. Gorham; F. Halzen; K. Hanson; K. Hoffman; A. Karle; J. L. Kelley; H. Landsman; J. Learned; C. Miki; R. Morse; R. Nichol; C. Rott; L. Ruckman; D. Seckel; G. Varner; D. Williams
texts
eye 41
favorite 0
comment 0
We discuss design considerations and simulation results for IceRay, a proposed large-scale ultra-high energy (UHE) neutrino detector at the South Pole. The array is designed to detect the coherent Askaryan radio emission from UHE neutrino interactions in the ice, with the goal of detecting the cosmogenic neutrino flux with reasonable event rates. Operating in coincidence with the IceCube neutrino detector would allow complete calorimetry of a subset of the events. We also report on the status...
Source: http://arxiv.org/abs/0904.1309v1
16
16
Jun 28, 2018
06/18
by
K. Belov; K. Mulrey; A. Romero-Wolf; S. A. Wissel; A. Zilles; K. Bechtol; K. Borch; P. Chen; J. Clem; P. W. Gorham; C. Hast; T. Huege; R. Hyneman; K. Jobe; K. Kuwatani; J. Lam; T. Liu; J. Nam; C. Naudet; R. Nichol; B. F. Rauch; B. Rotter; D. Saltzberg; H. Schoorlemmer; D. Seckel; B. Strutt; A. G. Vieregg; C. Williams
texts
eye 16
favorite 0
comment 0
For fifty years, cosmic-ray air showers have been detected by their radio emission. We present the first laboratory measurements that validate electrodynamics simulations used in air shower modeling. An experiment at SLAC provides a beam test of radio-frequency (RF) radiation from charged particle cascades in the presence of a magnetic field, a model system of a cosmic-ray air shower. This experiment provides a suite of controlled laboratory measurements to compare to particle-level simulations...
Topics: High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics, Astrophysics,...
Source: http://arxiv.org/abs/1507.07296
62
62
Sep 23, 2013
09/13
by
A. Silvestri; S. W. Barwick; J. J. Beatty; D. Z. Besson; W. R. Binns; B. Cai; J. M. Clem; A. Connolly; D. F. Cowen; P. F. Dowkontt; M. A. DuVernois; P. A. Evenson; D. Goldstein; P. W. Gorham; C. L. Hebert; M. H. Israel; H. Krawzczynski; J. G. Learned; K. M. Liewer; J. T. Link; S. Matsuno; P. Miocinovic; J. Nam; C. J. Naudet; R. Nichol; M. Rosen; D. Saltzberg; D. Seckel; G. S. Varner; F. Wu
texts
eye 62
favorite 0
comment 0
We describe a new experiment to search for neutrinos with energies above 3 x 10^18 eV based on the observation of short duration radio pulses that are emitted from neutrino-initiated cascades. The primary objective of the ANtarctic Impulse Transient Antenna (ANITA) mission is to measure the flux of Greisen-Zatsepin-Kuzmin (GZK) neutrinos and search for neutrinos from Active Galactic Nuclei (AGN). We present first results obtained from the successful launch of a 2-antenna prototype instrument...
Source: http://arxiv.org/abs/astro-ph/0411007v2
74
74
Sep 22, 2013
09/13
by
ANITA collaboration; P. Gorham; P. Allison; S. Barwick; J. Beatty; D. Besson; W. Binns; C. Chen; P. Chen; J. Clem; A. Connolly; P. Dowkontt; M. DuVernois; R. Field; D. Goldstein; A. Goodhue; C. Hast; C. Hebert; S. Hoover; M. Israel; J. Kowalski; J. Learned; K. Liewer; J. Link; E. Lusczek; S. Matsuno; B. Mercurio; C. Miki; P. Miocinovic; J. Nam; C. Naudet; R. Nichol; K. Palladino; K. Reil; A. Romero-Wolf; M. Rosen; L. Ruckman; D. Saltzberg; D. Seckel; G. Varner; D. Walz; Y. Wang; F. Wu
texts
eye 74
favorite 0
comment 0
We present a detailed report on the experimental details of the Antarctic Impulsive Transient Antenna (ANITA) long duration balloon payload, including the design philosophy and realization, physics simulations, performance of the instrument during its first Antarctic flight completed in January of 2007, and expectations for the limiting neutrino detection sensitivity. Neutrino physics results will be reported separately.
Source: http://arxiv.org/abs/0812.1920v1
63
63
Sep 22, 2013
09/13
by
ANITA collaboration; P. Gorham; P. Allison; S. Barwick; J. Beatty; D. Besson; W. Binns; C. Chen; P. Chen; J. Clem; A. Connolly; P. Dowkontt; M. DuVernois; R. Field; D. Goldstein; A. Goodhue; C. Hast; C. Hebert; S. Hoover; M. Israel; J. Kowalski; J. Learned; K. Liewer; J. Link; E. Lusczek; S. Matsuno; B. Mercurio; C. Miki; P. Miocinovic; J. Nam; C. Naudet; R. Nichol; K. Palladino; K. Reil; A. Romero-Wolf; M. Rosen; L. Ruckman; D. Saltzberg; D. Seckel; G. Varner; D. Walz; Y. Wang; F. Wu
texts
eye 63
favorite 0
comment 0
We report initial results of the first flight of the Antarctic Impulsive Transient Antenna (ANITA-1) 2006-2007 Long Duration Balloon flight, which searched for evidence of a diffuse flux of cosmic neutrinos above energies of 3 EeV. ANITA-1 flew for 35 days looking for radio impulses due to the Askaryan effect in neutrino-induced electromagnetic showers within the Antarctic ice sheets. We report here on our initial analysis, which was performed as a blind search of the data. No neutrino...
Source: http://arxiv.org/abs/0812.2715v1
50
50
Sep 21, 2013
09/13
by
P. W. Gorham; P. Allison; B. M. Baughman; J. J. Beatty; K. Belov; D. Z. Besson; S. Bevan; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; M. Detrixhe; D. De Marco; P. F. Dowkontt; M. DuVernois; E. W. Grashorn; B. Hill; S. Hoover; M. Huang; M. H. Israel; A. Javaid; K. M. Liewer; S. Matsuno; B. C. Mercurio; C. Miki; M. Mottram; J. Nam; R. J. Nichol; K. Palladino; A. Romero-Wolf; L. Ruckman; D. Saltzberg; D. Seckel; R. Y. Shang; G. S. Varner; A. G. Vieregg; Y. Wang
texts
eye 50
favorite 0
comment 0
This is an erratum to our paper in Physical Review D82:022004,2010, corresponding to preprint: arXiv:1003.2961 .
Source: http://arxiv.org/abs/1011.5004v1
48
48
Sep 18, 2013
09/13
by
A. G. Vieregg; K. Palladino; P. Allison; B. M. Baughman; J. J. Beatty; K. Belov; D. Z. Besson; S. Bevan; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; M. Detrixhe; D. De Marco; P. F. Dowkontt; M. DuVernois; P. W. Gorham; E. W. Grashorn; B. Hill; S. Hoover; M. Huang; M. H. Israel; A. Javaid; K. M. Liewer; S. Matsuno; B. C. Mercurio; C. Miki; M. Mottram; J. Nam; R. J. Nichol; A. Romero-Wolf; L. Ruckman; D. Saltzberg; D. Seckel; G. S. Varner; Y. Wang
texts
eye 48
favorite 0
comment 0
We set the first limits on the ultra-high energy (UHE) neutrino fluence at energies greater than 10^9 GeV from gamma-ray bursts (GRBs) based on data from the second flight of the ANtarctic Impulsive Transient Antenna (ANITA). During the 31 day flight of ANITA-II, 26 GRBs were recorded by Swift or Fermi. Of these, we analyzed the 12 GRBs which occurred during quiet periods when the payload was away from anthropogenic activity. In a blind analysis, we observe 0 events on a total background of...
Source: http://arxiv.org/abs/1102.3206v1
50
50
Sep 21, 2013
09/13
by
M. Detrixhe; D. Besson; P. W. Gorham; P. Allison; B. Baughmann; J. J. Beatty; K. Belov; S. Bevan; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; D. DeMarco; P. F. Dowkontt; M. A. Duvernois; C. Frankenfeld; E. W. Grashorn; D. P. Hogan; N. Griffith; B. Hill; S. Hoover; M. H. Israel; A. Javaid; K. M. Liewer; S. Matsuno; B. C. Mercurio; C. Miki; M. Mottram; J. Nam; R. J. Nichol; K. Palladino; A. Romero-Wolf; L. Ruckman; D. Saltzberg; D. Seckel; G. S. Varner; A. G. Vieregg; Y. Wang
texts
eye 50
favorite 0
comment 0
We have conducted a search for extended energy deposition trails left by ultra-relativistic magnetic monopoles interacting in Antarctic ice. The non-observation of any satisfactory candidates in the 31 days of accumulated ANITA-II flight data results in an upper limit on the diffuse flux of relativistic monopoles. We obtain a 90% C.L. limit of order 10^{-19}/(cm^2-s-sr) for values of Lorentz boost factor 10^{10}
Source: http://arxiv.org/abs/1008.1282v2
55
55
Sep 17, 2013
09/13
by
The ANITA Collaboration; P. W. Gorham; P. Allison; B. M. Baughman; J. J. Beatty; K. Belov; D. Z. Besson; S. Bevan; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; M. Detrixhe; D. De Marco; P. F. Dowkontt; M. DuVernois; E. W. Grashorn; B. Hill; S. Hoover; M. Huang; M. H. Israel; A. Javaid; K. M. Liewer; S. Matsuno; B. C. Mercurio; C. Miki; M. Mottram; J. Nam; R. J. Nichol; K. Palladino; A. Romero-Wolf; L. Ruckman; D. Saltzberg; D. Seckel; G. S. Varner; A. G. Vieregg; Y. Wang
texts
eye 55
favorite 0
comment 0
The Antarctic Impulsive Transient Antenna (ANITA) completed its second long-duration balloon flight in January 2009, with 31 days aloft (28.5 live days) over Antarctica. ANITA searches for impulsive coherent radio Cherenkov emission from 200 to 1200 MHz, arising from the Askaryan charge excess in ultra-high energy neutrino-induced cascades within Antarctic ice. This flight included significant improvements over the first flight in the payload sensitivity, efficiency, and a flight trajectory...
Source: http://arxiv.org/abs/1003.2961v3
89
89
Sep 19, 2013
09/13
by
D. Besson; J. Jenkins; S. Matsuno; J. Nam; M. Smith; S. W. Barwick; J. J. Beatty; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; P. F. Dowkontt; M. A. DuVernois; R. C. Field; D. Goldstein; P. W. Gorham; A. Goodhue; C. Hast; C. L. Hebert; S. Hoover; M. H. Israel; J. Kowalski; J. G. Learned; K. M. Liewer; J. T. Link; E. Lusczek; B. Mercurio; C. Miki; P. Miocinovic; C. J. Naudet; J. Ng; R. Nichol; K. Palladino; K. Reil; A. Romero-Wolf; M. Rosen; L. Ruckman; D. Saltzberg; D. Seckel; G. S....
texts
eye 89
favorite 0
comment 0
Radiowave detection of the Cherenkov radiation produced by neutrino-ice collisions requires an understanding of the radiofrequency (RF) response of cold polar ice. We herein report on a series of radioglaciological measurements performed approximately 10 km north of Taylor Dome Station, Antarctica from Dec. 6, 2006 - Dec. 16, 2006. Using RF signals broadcast from: a) an englacial discone, submerged to a depth of 100 meters and broadcasting to a surface dual polarization horn receiver, and b) a...
Source: http://arxiv.org/abs/astro-ph/0703413v2
49
49
Sep 18, 2013
09/13
by
ANITA collaboration; P. W. Gorham; S. W. Barwick; J. J. Beatty; D. Z. Besson; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; P. F. Dowkontt; M. A. DuVernois; R. C. Field; D. Goldstein; A. Goodhue; C. Hast; C. L. Hebert; S. Hoover; M. H. Israel; J. Kowalski; J. G. Learned; K. M. Liewer; J. T. Link; E. Lusczek; S. Matsuno; B. Mercurio; C. Miki; P. Miocinovic; J. Nam; C. J. Naudet; J. Ng; R. Nichol; K. Palladino; K. Reil; A. Romero-Wolf; M. Rosen; D. Saltzberg; D. Seckel; G. S. Varner; D....
texts
eye 49
favorite 0
comment 0
We report on the first observations of the Askaryan effect in ice: coherent impulsive radio Cherenkov radiation from the charge asymmetry in an electromagnetic (EM) shower. Such radiation has been observed in silica sand and rock salt, but this is the first direct observation from an EM shower in ice. These measurements are important since the majority of experiments to date that rely on the effect for ultra-high energy neutrino detection are being performed using ice as the target medium. As...
Source: http://arxiv.org/abs/hep-ex/0611008v2
56
56
Jul 19, 2013
07/13
by
S. Hoover; J. Nam; P. W. Gorham; E. Grashorn; P. Allison; S. W. Barwick; J. J. Beatty; K. Belov; D. Z. Besson; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; P. F. Dowkontt; M. A. DuVernois; R. C. Field; D. Goldstein; A. G. Vieregg; C. Hast; C. L. Hebert; M. H. Israel; A. Javaid; J. Kowalski; J. G. Learned; K. M. Liewer; J. T. Link; E. Lusczek; S. Matsuno; B. C. Mercurio; C. Miki; P. Miočinović; C. J. Naudet; J. Ng; R. J. Nichol; K. Palladino; K. Reil; A. Romero-Wolf; M. Rosen; L....
texts
eye 56
favorite 0
comment 0
We report the observation of sixteen cosmic ray events of mean energy of 1.5 x 10^{19} eV, via radio pulses originating from the interaction of the cosmic ray air shower with the Antarctic geomagnetic field, a process known as geosynchrotron emission. We present the first ultra-wideband, far-field measurements of the radio spectral density of geosynchrotron emission in the range from 300-1000 MHz. The emission is 100% linearly polarized in the plane perpendicular to the projected geomagnetic...
Source: http://arxiv.org/abs/1005.0035v2
54
54
Sep 23, 2013
09/13
by
P. Allison; J. Auffenberg; R. Bard; J. J. Beatty; D. Z. Besson; S. Boeser; C. Chen; P. Chen; A. Connolly; J. Davies; M. DuVernois; B. Fox; P. W. Gorham; E. W. Grashorn; K. Hanson; J. Haugen; K. Helbing; B. Hill; K. D. Hoffman; M. Huang; M. H. A. Huang; A. Ishihara; A. Karle; D. Kennedy; H. Landsman; A. Laundrie; T. C. Liu; L. Macchiarulo; K. Mase; T. Meures; R. Meyhandan; C. Miki; R. Morse; M. Newcomb; R. J. Nichol; K. Ratzlaff; M. Richman; L. Ritter; B. Rotter; P. Sandstrom; D. Seckel; J....
texts
eye 54
favorite 0
comment 0
We report on studies of the viability and sensitivity of the Askaryan Radio Array (ARA), a new initiative to develop a Teraton-scale ultra-high energy neutrino detector in deep, radio-transparent ice near Amundsen-Scott station at the South Pole. An initial prototype ARA detector system was installed in January 2011, and has been operating continuously since then. We report on studies of the background radio noise levels, the radio clarity of the ice, and the estimated sensitivity of the...
Source: http://arxiv.org/abs/1105.2854v2
86
86
Sep 21, 2013
09/13
by
D. Z. Besson; J. Stockham; M. Sullivan; P. Allison; S. W. Barwick; B. M. Baughman; J. J. Beatty; K. Belov; S. Bevan; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; D. De Marco; P. F. Dowkontt; M. DuVernois; D. Goldstein; P. W. Gorham; E. W. Grashorn; B. Hill; S. Hoover; M. Huang; M. H. Israel; A. Javaid; J. Kowalski; J. Learned; K. M. Liewer; S. Matsuno; B. C. Mercurio; C. Miki; M. Mottram; J. Nam; C. J. Naudet; R. J. Nichol; K. Palladino; A. Romero-Wolf; L. Ruckman; D. Saltzberg; D....
texts
eye 86
favorite 0
comment 0
From an elevation of ~38 km, the balloon-borne ANtarctic Impulsive Transient Antenna (ANITA) is designed to detect the up-coming radio frequency (RF) signal resulting from a sub-surface neutrino-nucleon collision. Although no neutrinos have been discovered thus far, ANITA is nevertheless the only experiment to self-trigger on radio frequency emissions from cosmic-ray induced atmospheric air showers. In the majority of those cases, down-coming RF signals are observed via their reflection from...
Source: http://arxiv.org/abs/1301.4423v1
19
19
Jun 28, 2018
06/18
by
P. Allison; J. Auffenberg; R. Bard; J. J. Beatty; D. Z. Besson; C. Bora; C. -C. Chen; P. Chen; A. Connolly; J. P. Davies; M. A. DuVernois; B. Fox; P. W. Gorham; K. Hanson; B. Hill; K. D. Hoffman; E. Hong; L. -C. Hu; A. Ishihara; A. Karle; J. Kelley; I. Kravchenko; H. Landsman; A. Laundrie; C. -J. Li; T. Liu; M. -Y. Lu; R. Maunu; K. Mase; T. Meures; C. Miki; J. Nam; R. J. Nichol; G. Nir; A. O'Murchadha; C. G. Pfendner; K. Ratzlaff; B. Rotter; P. Sandstrom; D. Seckel; A. Shultz; M. Song; J....
texts
eye 19
favorite 0
comment 0
We report on a search for ultra-high-energy (UHE) neutrinos from gamma-ray bursts (GRBs) in the data set collected by the Testbed station of the Askaryan Radio Array (ARA) in 2011 and 2012. From 57 selected GRBs, we observed no events that survive our cuts, which is consistent with 0.12 expected background events. Using NeuCosmA as a numerical GRB reference emission model, we estimate upper limits on the prompt UHE GRB neutrino fluence and quasi-diffuse flux from $10^{7}$ to $10^{10}$ GeV. This...
Topics: High Energy Astrophysical Phenomena, Astrophysics
Source: http://arxiv.org/abs/1507.00100
4
4.0
Jun 30, 2018
06/18
by
ARA Collaboration; P. Allison; J. Auffenberg; R. Bard; J. J. Beatty; D. Z. Besson; C. Bora; C. -C. Chen; P. Chen; A. Connolly; J. P. Davies; M. A. DuVernois; B. Fox; P. W. Gorham; K. Hanson; B. Hill; K. D. Hoffman; E. Hong; L. -C. Hu; A. Ishihara; A. Karle; J. Kelley; I. Kravchenko; H. Landsman; A. Laundrie; C. -J. Li; T. Liu; M. -Y. Lu; R. Maunu; K. Mase; T. Meures; C. Miki; J. Nam; R. J. Nichol; G. Nir; A. O'Murchadha; C. G. Pfendner; K. Ratzlaff; M. Richman; B. Rotter; P. Sandstrom; D....
texts
eye 4
favorite 0
comment 0
The Askaryan Radio Array (ARA) is an ultra-high energy ($>10^{17}$ eV) cosmic neutrino detector in phased construction near the South Pole. ARA searches for radio Cherenkov emission from particle cascades induced by neutrino interactions in the ice using radio frequency antennas ($\sim150-800$ MHz) deployed at a design depth of 200 m in the Antarctic ice. A prototype ARA Testbed station was deployed at $\sim30$ m depth in the 2010-2011 season and the first three full ARA stations were...
Topics: Instrumentation and Methods for Astrophysics, High Energy Astrophysical Phenomena, Astrophysics
Source: http://arxiv.org/abs/1404.5285
12
12
Jun 28, 2018
06/18
by
H. Schoorlemmer; K. Belov; A. Romero-Wolf; D. García-Fernández; V. Bugaev; S. A. Wissel; P. Allison; J. Alvarez-Muñiz; S. W. Barwick; J. J. Beatty; D. Z. Besson; W. R. Binns; W. R. Carvalho; C. Chen; P. Chen; J. M. Clem; A. Connolly; P. F. Dowkontt; M. A. DuVernois; R. C. Field; D. Goldstein; P. W. Gorham; C. Hast; C. L. Heber; T. Huege; S. Hoover; M. H. Israel; A. Javaid; J. Kowalski; J. Lam; J. G. Learned; K. M. Liewer; J. T. Link; E. Lusczek; S. Matsuno; B. C. Mercurio; C. Miki; P....
texts
eye 12
favorite 0
comment 0
The first flight of the Antarctic Impulsive Transient Antenna (ANITA) experiment recorded 16 radio signals that were emitted by cosmic-ray induced air showers. For 14 of these events, this radiation was reflected from the ice. The dominant contribution to the radiation from the deflection of positrons and electrons in the geomagnetic field, which is beamed in the direction of motion of the air shower. This radiation is reflected from the ice and subsequently detected by the ANITA experiment at...
Topics: High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1506.05396
6
6.0
Jun 29, 2018
06/18
by
P. W. Gorham; J. Nam; A. Romero-Wolf; S. Hoover; P. Allison; O. Banerjee; J. J. Beatty; K. Belov; D. Z. Besson; W. R. Binns; V. Bugaev; P. Cao; C. Chen; P. Chen; J. M. Clem; A. Connolly; B. Dailey; C. Deaconu; L. Cremonesi; P. F. Dowkonnt; M. A. Duvernois; R. C. Field; B. D. Fox; D. Goldstein; J. Gordon; C. Hast; C. L. Hebert; B. Hill; K. Hughes; R. Hupe; M. H. Israel; A. Javaid; J. Kowalski; J. Lam; J. G. Learned; K. M. Liewer; T. C. Liu; J. T. Link; E. Lusczek; S. Matsuno; B. C. Mercurio; C....
texts
eye 6
favorite 0
comment 0
We report on four radio-detected cosmic-ray (CR) or CR-like events observed with the Antarctic Impulsive Transient Antenna (ANITA), a NASA-sponsored long-duration balloon payload. Two of the four were previously identified as stratospheric CR air showers during the ANITA-I flight. A third stratospheric CR was detected during the ANITA-II flight. Here we report on characteristics these three unusual CR events, which develop nearly horizontally, 20-30~km above the surface of the Earth. In...
Topics: Astrophysics, High Energy Astrophysical Phenomena
Source: http://arxiv.org/abs/1603.05218
25
25
Jun 28, 2018
06/18
by
ARA Collaboration; P. Allison; R. Bard; J. J. Beatty; D. Z. Besson; C. Bora; C. -C. Chen; C. -H. Chen; P. Chen; A. Christenson; A. Connolly; J. Davies; M. Duvernois; B. Fox; R. Gaior; P. W. Gorham; K. Hanson; J. Haugen; B. Hill; K. D. Hoffman; E. Hong; S. -Y. Hsu; L. Hu; J. -J. Huang; M. -H. A. Huang; A. Ishihara; A. Karle; J. L. Kelley; D. Kennedy; I. Kravchenko; T. Kuwabara; H. Landsman; A. Laundrie; C. -J. Li; T. C. Liu; M. -Y. Lu; L. Macchiarulo; K. Mase; T. Meures; R. Meyhandan; C. Miki;...
texts
eye 25
favorite 0
comment 0
Ultra-high energy neutrinos are interesting messenger particles since, if detected, they can transmit exclusive information about ultra-high energy processes in the Universe. These particles, with energies above $10^{16}\mathrm{eV}$, interact very rarely. Therefore, detectors that instrument several gigatons of matter are needed to discover them. The ARA detector is currently being constructed at South Pole. It is designed to use the Askaryan effect, the emission of radio waves from...
Topics: High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1507.08991
26
26
Jun 27, 2018
06/18
by
C. Adams; J. R. Alonso; A. M. Ankowski; J. A. Asaadi; J. Ashenfelter; S. N. Axani; K. Babu; C. Backhouse; H. R. Band; P. S. Barbeau; N. Barros; M. Lokajicek; W. C. Louis; K. Luk; J. Lykken; W. J. Marciano; J. Maricic; D. M. Markoff; D. A. Martinez Caicedo; C. Mauger; K. Mavrokoridis; A. Bernstein; E. McCluskey; D. McKeen; R. McKeown; G. Mills; I. Mocioiu; B. Monreal; M. R. Mooney; J. G. Morfin; P. Mumm; J. Napolitano; M. Betancourt; R. Neilson; J. K. Nelson; M. Nessi; D. Norcini; F. Nova; D. R....
texts
eye 26
favorite 0
comment 0
The US neutrino community gathered at the Workshop on the Intermediate Neutrino Program (WINP) at Brookhaven National Laboratory February 4-6, 2015 to explore opportunities in neutrino physics over the next five to ten years. Scientists from particle, astroparticle and nuclear physics participated in the workshop. The workshop examined promising opportunities for neutrino physics in the intermediate term, including possible new small to mid-scale experiments, US contributions to large...
Topics: Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment, Physics
Source: http://arxiv.org/abs/1503.06637
60
60
Sep 24, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; D. Altmann; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. Bell; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser; O. Botner;...
texts
eye 60
favorite 0
comment 0
A search for an excess of muon-neutrinos from dark matter annihilations in the Sun has been performed with the AMANDA-II neutrino telescope using data collected in 812 days of livetime between 2001 and 2006 and 149 days of livetime collected with the AMANDA-II and the 40-string configuration of IceCube during 2008 and early 2009. No excess over the expected atmospheric neutrino background has been observed. We combine these results with the previously published IceCube limits obtained with data...
Source: http://arxiv.org/abs/1112.1840v2
54
54
Sep 19, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser; O. Botner; J. Braun; S. Buitink; M. Carson; D. Chirkin;...
texts
eye 54
favorite 0
comment 0
A measurement of the atmospheric muon neutrino energy spectrum from 100 GeV to 400 TeV was performed using a data sample of about 18,000 up-going atmospheric muon neutrino events in IceCube. Boosted decision trees were used for event selection to reject mis-reconstructed atmospheric muons and obtain a sample of up-going muon neutrino events. Background contamination in the final event sample is less than one percent. This is the first measurement of atmospheric neutrinos up to 400 TeV, and is...
Source: http://arxiv.org/abs/1010.3980v2
50
50
Sep 22, 2013
09/13
by
The IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser; O. Botner; J. Braun; A. M. Brown; S....
texts
eye 50
favorite 0
comment 0
The detection of acoustic signals from ultra-high energy neutrino interactions is a promising method to measure the tiny flux of cosmogenic neutrinos expected on Earth. The energy threshold for this process depends strongly on the absolute noise level in the target material. The South Pole Acoustic Test Setup (SPATS), deployed in the upper part of four boreholes of the IceCube Neutrino Observatory, has monitored the noise in Antarctic ice at the geographic South Pole for more than two years...
Source: http://arxiv.org/abs/1103.1216v2
47
47
Sep 22, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser; O. Botner; J. Braun; A. M. Brown; S. Buitink;...
texts
eye 47
favorite 0
comment 0
We report on a search for extremely-high energy neutrinos with energies greater than $10^6$ GeV using the data taken with the IceCube detector at the South Pole. The data was collected between April 2008 and May 2009 with the half completed IceCube array. The absence of signal candidate events in the sample of 333.5 days of livetime significantly improves model independent limit from previous searches and allows to place a limit on the diffuse flux of cosmic neutrinos with an $E^{-2}$ spectrum...
Source: http://arxiv.org/abs/1103.4250v3
47
47
Sep 21, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; M. M. Allen; D. Altmann; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser; O....
texts
eye 47
favorite 0
comment 0
In this paper we present the results of searches for periodic neutrino emission from a catalog of binary systems. Such modulation, observed in the photon flux, would be caused by the geometry of these systems. In the analysis, the period is fixed by these photon observations, while the phase and duration of the neutrino emission are treated as free parameters to be fit with the data. If the emission occurs during ~20% or less of the total period, this analysis achieves better sensitivity than a...
Source: http://arxiv.org/abs/1108.3023v2
58
58
Sep 23, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; D. Altmann; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; V. Baum; R. Bay; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. Bell; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose1; S. Böser; O. Botner; L....
texts
eye 58
favorite 0
comment 0
The first dedicated search for ultra-high energy (UHE) tau neutrinos of astrophysical origin was performed using the IceCube detector in its 22-string configuration with an instrumented volume of roughly 0.25 km^3. The search also had sensitivity to UHE electron and muon neutrinos. After application of all selection criteria to approximately 200 live-days of data, we expect a background of 0.60 +/- 0.19 (stat.) $^{+0.56}_{-0.58}$ (syst.) events and observe three events, which after inspection...
Source: http://arxiv.org/abs/1202.4564v3
45
45
Sep 22, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser; O. Botner; J. Braun; A. M. Brown; S. Buitink;...
texts
eye 45
favorite 0
comment 0
Self-annihilating or decaying dark matter in the Galactic halo might produce high energy neutrinos detectable with neutrino telescopes. We have conducted a search for such a signal using 276 days of data from the IceCube 22-string configuration detector acquired during 2007 and 2008. The effect of halo model choice in the extracted limit is reduced by performing a search that considers the outer halo region and not the Galactic Center. We constrain any large scale neutrino anisotropy and are...
Source: http://arxiv.org/abs/1101.3349v1
85
85
Sep 21, 2013
09/13
by
The IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser; O. Botner; J. Braun; A. M. Brown; S....
texts
eye 85
favorite 0
comment 0
This paper presents searches for flaring sources of neutrinos using the IceCube neutrino telescope. For the first time, a search is performed over the entire parameter space of energy, direction and time looking for neutrino flares of 20 microseconds to a year duration from astrophysical sources among the atmospheric neutrino and muon backgrounds. Searches which integrate over time are less sensitive to flares because they are affected by a larger background of atmospheric neutrinos and muons...
Source: http://arxiv.org/abs/1104.0075v2
55
55
Sep 20, 2013
09/13
by
The IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; M. Bissok; E. Blaufuss; D. J. Boersma; C. Bohm; O. Botner; L. Bradley; J. Braun; S. Buitink; M. Carson; D. Chirkin; B. Christy; J. Clem; S. Cohen;...
texts
eye 55
favorite 0
comment 0
Over 5,000 PMTs are being deployed at the South Pole to compose the IceCube neutrino observatory. Many are placed deep in the ice to detect Cherenkov light emitted by the products of high-energy neutrino interactions, and others are frozen into tanks on the surface to detect particles from atmospheric cosmic ray showers. IceCube is using the 10-inch diameter R7081-02 made by Hamamatsu Photonics. This paper describes the laboratory characterization and calibration of these PMTs before...
Source: http://arxiv.org/abs/1002.2442v1
57
57
Sep 22, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser; O. Botner; J. Braun; A. M. Brown; S. Buitink;...
texts
eye 57
favorite 0
comment 0
IceCube has become the first neutrino telescope with a sensitivity below the TeV neutrino flux predicted from gamma-ray bursts if GRBs are responsible for the observed cosmic-ray flux above $10^{18}$ eV. Two separate analyses using the half-complete IceCube detector, one a dedicated search for neutrinos from $p \gamma$-interactions in the prompt phase of the GRB fireball, and the other a generic search for any neutrino emission from these sources over a wide range of energies and emission...
Source: http://arxiv.org/abs/1101.1448v2
49
49
Sep 22, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Boser; O. Botner; J. Braun; S. Buitink; M. Carson; D. Chirkin;...
texts
eye 49
favorite 0
comment 0
SN 2008D, a core collapse supernova at a distance of 27 Mpc, was serendipitously discovered by the Swift satellite through an associated X-ray flash. Core collapse supernovae have been observed in association with long gamma-ray bursts and X-ray flashes and a physical connection is widely assumed. This connection could imply that some core collapse supernovae possess mildly relativistic jets in which high-energy neutrinos are produced through proton-proton collisions. The predicted neutrino...
Source: http://arxiv.org/abs/1101.3942v1
50
50
Sep 23, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; D. Altmann; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; V. Baum; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. Bell; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser;...
texts
eye 50
favorite 0
comment 0
We report on a measurement of the cosmic ray energy spectrum with the IceTop air shower array, the surface component of the IceCube Neutrino Observatory at the South Pole. The data used in this analysis were taken between June and October, 2007, with 26 surface stations operational at that time, corresponding to about one third of the final array. The fiducial area used in this analysis was 0.122 km^2. The analysis investigated the energy spectrum from 1 to 100 PeV measured for three different...
Source: http://arxiv.org/abs/1202.3039v1
58
58
Sep 19, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; M. Bissok; E. Blaufuss; D. J. Boersma; C. Bohm; S. Böser; O. Botner; L. Bradley; J. Braun; S. Buitink; M. Carson; D. Chirkin; B. Christy; J. Clem; F....
texts
eye 58
favorite 0
comment 0
We report on the results of the search for extremely-high energy (EHE) neutrinos with energies above $10^7$ GeV obtained with the partially ($\sim$30%) constructed IceCube in 2007. From the absence of signal events in the sample of 242.1 days of effective livetime, we derive a 90% C.L. model independent differential upper limit based on the number of signal events per energy decade at $E^2 \phi_{\nu_e+\nu_\mu+\nu_\tau}\simeq 1.4 \times 10^{-6}$ GeV cm$^{-2}$ sec$^{-1}$ sr$^{-1}$ for neutrinos...
Source: http://arxiv.org/abs/1009.1442v1
64
64
Sep 19, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser; O. Botner; J. Braun; S. Buitink; M. Carson; D. Chirkin;...
texts
eye 64
favorite 0
comment 0
A search for sidereal modulation in the flux of atmospheric muon neutrinos in IceCube was performed. Such a signal could be an indication of Lorentz-violating physics. Neutrino oscillation models, derivable from extensions to the Standard Model, allow for neutrino oscillations that depend on the neutrino's direction of propagation. No such direction-dependent variation was found. A discrete Fourier transform method was used to constrain the Lorentz and CPT-violating coefficients in one of these...
Source: http://arxiv.org/abs/1010.4096v2
79
79
Sep 21, 2013
09/13
by
IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Böser; O. Botner; J. Braun; A. M. Brown; S. Buitink;...
texts
eye 79
favorite 0
comment 0
The IceCube Neutrino Observatory is a 1 km$^{3}$ detector currently taking data at the South Pole. One of the main strategies used to look for astrophysical neutrinos with IceCube is the search for a diffuse flux of high-energy neutrinos from unresolved sources. A hard energy spectrum of neutrinos from isotropically distributed astrophysical sources could manifest itself as a detectable signal that may be differentiated from the atmospheric neutrino background by spectral measurement. This...
Source: http://arxiv.org/abs/1104.5187v5
