602
602
Jun 21, 2005
06/05
by
K Clark
audio
eye 602
favorite 0
comment 0
Seattle and Beyond Podcast 12
Topic: Podcasts
Source: http://www.getniched.com/seattleblog/
Historic Pennsylvania Leaflet No. 22
Topics: oil, Pennsylvania, history, Ida Tarbell, industry, journalism
67
67
Feb 11, 2016
02/16
by
B Kensley; K Clark
texts
eye 67
favorite 0
comment 0
"An Unrecognized Subspecies of Bellona cristatus" is an article from The Auk, Volume 22 . View more articles from The Auk . View this article on JSTOR . View this article's JSTOR metadata . You may also retrieve all of this items metadata in JSON at the following URL: https://archive.org/metadata/jstor-4069733
Source: http://www.jstor.org/stable/10.2307/4069733
31
31
Sep 23, 2013
09/13
by
Bryan K. Clark
texts
eye 31
favorite 0
comment 0
Z2 spin liquids have topological order. One manifestation of this is that a Z2 spin liquid on a torus exhibits a four-fold degeneracy. Recent numerical evidence has argued for the existence of a spin liquid ground state in the Hubbard model on a honeycomb lattice near U approximately 4. The evidence for this claim involves the presence of a gapped state that lacks any identifiable order. This argument relies on being able to distinguish small order from no order which is notoriously difficult....
Source: http://arxiv.org/abs/1305.0278v1
162
162
May 1, 2012
05/12
by
Wesley K. Clark
texts
eye 162
favorite 2
comment 0
Topics: Clark, Wesley K., Yugoslav War, 1991-1995 -- Personal narratives, American., Yugoslav War,...
0
0.0
Jun 30, 2018
06/18
by
Hassan Shapourian; Bryan K. Clark
texts
eye 0
favorite 0
comment 0
We study the extended Bose-Hubbard model on the square lattice at half filling as a function of next-nearest neighbor hopping amplitude and interaction strength. To variationally map out the phase diagram of this model, we develop a two-parameter family of wave-functions based on the parton construction which can describe both topological and broken symmetry phases on equal footing. In addition, our wave-functions resolve long standing issues with more conventional short-range Jastrow...
Topics: Quantum Gases, Strongly Correlated Electrons, Condensed Matter
Source: http://arxiv.org/abs/1412.5597
0
0.0
Jun 30, 2018
06/18
by
David Pekker; Bryan K. Clark
texts
eye 0
favorite 0
comment 0
Anderson insulators are non-interacting disordered systems which have localized single particle eigenstates. The interacting analogue of Anderson insulators are the Many-Body Localized (MBL) phases. The natural language for representing the spectrum of the Anderson insulator is that of product states over the single-particle modes. We show that product states over Matrix Product Operators of small bond dimension is the corresponding natural language for describing the MBL phases. In this...
Topics: Strongly Correlated Electrons, Disordered Systems and Neural Networks, Condensed Matter
Source: http://arxiv.org/abs/1410.2224
1
1.0
Mar 14, 2020
03/20
by
D R Franz; K Clark
texts
eye 1
favorite 0
comment 0
64
64
Sep 21, 2013
09/13
by
Michael H. Kolodrubetz; Bryan K. Clark
texts
eye 64
favorite 0
comment 0
Finding the ground state of a fermionic Hamiltonian using quantum Monte Carlo is a very difficult problem, due to the Fermi sign problem. While still scaling exponentially, full configuration-interaction Monte Carlo (FCI-QMC) mitigates some of the exponential variance by allowing annihilation of noise -- whenever two walkers arrive at the same configuration with opposite signs, they are removed from the simulation. While FCI-QMC has been quite successful for quantum chemistry problems, its...
Source: http://arxiv.org/abs/1204.1490v1
315
315
Feb 10, 2008
02/08
by
HENRY LAW AND D. K . CLARK
texts
eye 315
favorite 0
comment 0
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Source: http://books.google.com/books?id=Ca43AAAAMAAJ&oe=UTF-8
0
0.0
Jun 30, 2018
06/18
by
Bryan K. Clark; Hitesh J. Changlani
texts
eye 0
favorite 0
comment 0
We apply a series of projection techniques on top of tensor networks to compute energies of ground state wave functions with higher accuracy than tensor networks alone with minimal additional cost. We consider both matrix product states as well as tree tensor networks in this work. Building on top of these approaches, we apply fixed-node quantum Monte Carlo, Lanczos steps, and exact projection. We demonstrate these improvements for the triangular lattice Heisenberg model, where we capture up to...
Topics: Strongly Correlated Electrons, Condensed Matter
Source: http://arxiv.org/abs/1404.2296
"Journal of the Society of Arts, Vol. 13, no. 653" is an article from The Journal of the Society of Arts, Volume 13 . View more articles from The Journal of the Society of Arts . View this article on JSTOR . View this article's JSTOR metadata . You may also retrieve all of this items metadata in JSON at the following URL: https://archive.org/metadata/jstor-41323769
Source: http://www.jstor.org/stable/10.2307/41323769
5
5.0
Jun 28, 2018
06/18
by
Xiongjie Yu; David Pekker; Bryan K. Clark
texts
eye 5
favorite 0
comment 0
A key property of many-body localization, the localization of quantum particles in systems with both quenched disorder and interactions, is the area law entanglement of even highly excited eigenstates of many-body localized Hamiltonians. Matrix Product States (MPS) can be used to efficiently represent low entanglement (area law) wave functions in one dimension. An important application of MPS is the widely used Density Matrix Renormalization Group (DMRG) algorithm for finding ground states of...
Topics: Disordered Systems and Neural Networks, Strongly Correlated Electrons, Condensed Matter, Quantum...
Source: http://arxiv.org/abs/1509.01244
50
50
Sep 23, 2013
09/13
by
Michael Kolodrubetz; Bryan K. Clark; David A. Huse
texts
eye 50
favorite 0
comment 0
We solve for the time-dependent finite-size scaling functions of the 1D transverse-field Ising chain during a linear-in-time ramp of the field through the quantum critical point. We then simulate Mott-insulating bosons in a tilted potential, an experimentally-studied system in the same equilibrium universality class, and demonstrate that universality holds for the dynamics as well. We find qualitatively athermal features of the scaling functions, such as negative spin correlations, and show...
Source: http://arxiv.org/abs/1112.6422v3
34
34
Sep 21, 2013
09/13
by
Michael Kolodrubetz; David Pekker; Bryan K. Clark; Krishnendu Sengupta
texts
eye 34
favorite 0
comment 0
We study the non-equilibrium dynamics of one-dimensional Mott insulating bosons in the presence of a tunable effective electric field E which takes the system across a quantum critical point (QCP) separating a disordered and a translation symmetry broken ordered phase. We provide an exact numerical computation of the residual energy Q, the log-fidelity F, the excess defect density D, and the order parameter correlation function for a linear-in-time variation of E with a rate v. We discuss the...
Source: http://arxiv.org/abs/1106.4031v1
0
0.0
Jun 29, 2018
06/18
by
Krishna Kumar; Hitesh J. Changlani; Bryan K. Clark; Eduardo Fradkin
texts
eye 0
favorite 0
comment 0
We perform an exact diagonalization study of the spin-$1/2$ XXZ Heisenberg antiferromagnet on the kagome lattice at finite magnetization $m = \frac{2}{3}$ with an emphasis on the XY point ($J_z = 0$), and in the presence of a small chiral term. Recent analytic work by Kumar, Sun and Fradkin [Phys. Rev. B 90, 174409 (2014)] on the same model, using a newly developed flux attachment transformation, predicts a plateau at this value of the magnetization described by a chiral spin liquid (CSL) with...
Topics: Condensed Matter, Strongly Correlated Electrons
Source: http://arxiv.org/abs/1606.04103
37
37
Sep 18, 2013
09/13
by
D. K. Clark; L. S. Tsimring; I. S. Aranson
texts
eye 37
favorite 0
comment 0
We report an experimental study of the dynamics of an air-fluidized thin granular layer. Near-onset behavior of this shallow fluidized bed was described in the earlier paper (Tsimring et al, 1999). Above the threshold of fluidization the system exhibits a Hopf bifurcation as the layer starts to oscillate at a certain frequency due to a feedback between the layer dilation and the airflow drag force. After application of temporal band-pass filtering of this frequency we discovered the...
Source: http://arxiv.org/abs/nlin/0005010v1
41
41
Sep 21, 2013
09/13
by
Bryan K. Clark; Michele Casula; D. M. Ceperley
texts
eye 41
favorite 0
comment 0
We study the Wigner crystal melting in a two dimensional quantum system of particles interacting via the 1/r Coulomb potential. We use quantum Monte Carlo methods to calculate its phase diagram, locate the Wigner crystal region, and analyze its instabilities towards the liquid phase. We discuss the role of quantum effects in the critical behavior of the system, and compare our numerical results with the classical theory of melting, and the microemulsion theory of frustrated Coulomb systems. We...
Source: http://arxiv.org/abs/0905.4515v1
"Journal of the Society of Arts, Vol. 13, no. 655" is an article from The Journal of the Society of Arts, Volume 13 . View more articles from The Journal of the Society of Arts . View this article on JSTOR . View this article's JSTOR metadata . You may also retrieve all of this items metadata in JSON at the following URL: https://archive.org/metadata/jstor-41323770
Source: http://www.jstor.org/stable/10.2307/41323770
0
0.0
Jun 29, 2018
06/18
by
Xiongjie Yu; David J. Luitz; Bryan K. Clark
texts
eye 0
favorite 0
comment 0
We introduce the cut averaged entanglement entropy in disordered periodic spin chains and prove it to be a concave function of subsystem size for individual eigenstates. This allows us to identify the entanglement scaling as a function of subsystem size for individual states in inhomogeneous systems. Using this quantity, we probe the critical region between the many-body localized (MBL) and ergodic phases in finite systems. In the middle of the spectrum, we show evidence for bimodality of the...
Topics: Disordered Systems and Neural Networks, Condensed Matter, Strongly Correlated Electrons
Source: http://arxiv.org/abs/1606.01260
44
44
Sep 19, 2013
09/13
by
B. K. Clark; D. A. Abanin; S. L. Sondhi
texts
eye 44
favorite 0
comment 0
Recent numerical work (Nature 464, 847 (2010)) indicates the existence of a spin liquid phase (SL) that intervenes between the antiferromagnetic and semimetallic phases of the half filled Hubbard model on a honeycomb lattice. To better understand the nature of this exotic phase, we study the quantum $J_1-J_2$ spin model on the honeycomb lattice, which provides an effective description of the Mott insulating region of the Hubbard model. Employing the variational Monte Carlo approach, we analyze...
Source: http://arxiv.org/abs/1010.3011v1
0
0.0
Oct 30, 2019
10/19
by
M K Clark; D S Lee; J B Funderburg
texts
eye 0
favorite 0
comment 0
"Journal of the Society of Arts, Vol. 13, no. 651" is an article from The Journal of the Society of Arts, Volume 13 . View more articles from The Journal of the Society of Arts . View this article on JSTOR . View this article's JSTOR metadata . You may also retrieve all of this items metadata in JSON at the following URL: https://archive.org/metadata/jstor-41323767
Source: http://www.jstor.org/stable/10.2307/41323767
28
28
Sep 21, 2013
09/13
by
Kapil Ahuja; Bryan K. Clark; Eric de Sturler; David M. Ceperley; Jeongnim Kim
texts
eye 28
favorite 0
comment 0
Quantum Monte Carlo (QMC) methods are often used to calculate properties of many body quantum systems. The main cost of many QMC methods, for example the variational Monte Carlo (VMC) method, is in constructing a sequence of Slater matrices and computing the ratios of determinants for successive Slater matrices. Recent work has improved the scaling of constructing Slater matrices for insulators so that the cost of constructing Slater matrices in these systems is now linear in the number of...
Source: http://arxiv.org/abs/1008.5113v2
6
6.0
Jun 28, 2018
06/18
by
Xiao Chen; Xiongjie Yu; Gil Young Cho; Bryan K. Clark; Eduardo Fradkin
texts
eye 6
favorite 0
comment 0
We construct a family of many-body wave functions to study the many-body localization phase transition. The wave functions have a Rokhsar-Kivelson form, in which the weight for the configurations are chosen from the Gibbs weights of a classical spin glass model, known as the Random Energy Model, multiplied by a random sign structure to represent a highly excited state. These wave functions show a phase transition into an MBL phase. In addition, we see three regimes of entanglement scaling with...
Topics: Disordered Systems and Neural Networks, Statistical Mechanics, Strongly Correlated Electrons,...
Source: http://arxiv.org/abs/1509.03890
76
76
Sep 23, 2013
09/13
by
M. A. Morales; J. McMinis; B. K. Clark; J. Kim; G. Scuseria
texts
eye 76
favorite 0
comment 0
Quantum Monte Carlo (QMC) methods have received considerable attention over the last decades due to their great promise for providing a direct solution to the many-body Schrodinger equation in electronic systems. Thanks to their low scaling with number of particles, QMC methods present a compelling competitive alternative for the accurate study of large molecular systems and solid state calculations. In spite of such promise, the method has not permeated the quantum chemistry community broadly,...
Source: http://arxiv.org/abs/1303.6676v1
8
8.0
Jun 28, 2018
06/18
by
Dave Wecker; Matthew B. Hastings; Nathan Wiebe; Bryan K. Clark; Chetan Nayak; Matthias Troyer
texts
eye 8
favorite 0
comment 0
One of the main applications of future quantum computers will be the simulation of quantum models. While the evolution of a quantum state under a Hamiltonian is straightforward (if sometimes expensive), using quantum computers to determine the ground state phase diagram of a quantum model and the properties of its phases is more involved. Using the Hubbard model as a prototypical example, we here show all the steps necessary to determine its phase diagram and ground state properties on a...
Topics: Quantum Physics, Strongly Correlated Electrons, Condensed Matter
Source: http://arxiv.org/abs/1506.05135
"Journal of the Society for Arts, Vol. 7, no. 340" is an article from The Journal of the Society of Arts, Volume 7 . View more articles from The Journal of the Society of Arts . View this article on JSTOR . View this article's JSTOR metadata . You may also retrieve all of this items metadata in JSON at the following URL: https://archive.org/metadata/jstor-41334483
Source: http://www.jstor.org/stable/10.2307/41334483
50
50
Sep 18, 2013
09/13
by
Ethan W. Brown; Bryan K. Clark; Jonathan L. DuBois; David M. Ceperley
texts
eye 50
favorite 0
comment 0
We perform calculations of the {3D} finite-temperature homogeneous electron gas (HEG) in the warm-dense regime ({r_{s} \equiv (3/4\pi n)^{1/3}a_{B}^{- 1} = 1.0- 40.0} and {\Theta \equiv T/T_{F} = 0.0625- 8.0}) using restricted path integral Monte Carlo (RPIMC). Precise energies, pair correlation functions, and structure factors are obtained. For all densities, we find a significant discrepancy between the ground state parameterized local density approximation (LDA) and our results around...
Source: http://arxiv.org/abs/1211.6130v2
24
24
Sep 18, 2013
09/13
by
Michael H. Kolodrubetz; James S. Spencer; Bryan K. Clark; W. Matthew C. Foulkes
texts
eye 24
favorite 0
comment 0
The sign problem in Full Configuration Interaction Quantum Monte Carlo (FCIQMC) without annihilation can be understood as an instability of the psi-particle population to the ground state of the matrix obtained by making all off-diagonal elements of the Hamiltonian negative. Such a matrix, and hence the sign problem, is basis dependent. In this paper we discuss the properties of a physically important basis choice: first versus second quantization. For a given choice of single-particle...
Source: http://arxiv.org/abs/1209.3044v3
6
6.0
Jun 30, 2018
06/18
by
Hitesh J. Changlani; Dmitrii Kochkov; Krishna Kumar; Bryan K. Clark; Eduardo Fradkin
texts
eye 6
favorite 0
comment 0
One of the challenges in theoretical condensed matter physics is the physics of strongly correlated systems in regimes in which all interactions are nearly equally strong. This is particularly the case in quantum spin systems on geometrically frustrated lattices where, the inability to simultaneously satisfy competing exchange interactions, often results in the selection of magnetically ordered or exotic disordered spin liquid ground states. We report the existence of a quantum macroscopically...
Topics: Strongly Correlated Electrons, Condensed Matter
Source: http://arxiv.org/abs/1703.04659
48
48
Sep 21, 2013
09/13
by
Bryan K. Clark; Miguel A. Morales; Jeremy McMinis; Jeongnim Kim; Gustavo E. Scuseria
texts
eye 48
favorite 0
comment 0
Quantum Monte Carlo (QMC) methods such as variational Monte Carlo and fixed node diffusion Monte Carlo depend heavily on the quality of the trial wave function. Although Slater-Jastrow wave functions are the most commonly used variational ansatz in electronic structure, more sophisticated wave-functions are critical to ascertaining new physics. One such wave function is the multiSlater-Jastrow wave function which consists of a Jastrow function multiplied by the sum of Slater determinants. In...
Source: http://arxiv.org/abs/1106.2456v1
78 RPMs and Cylinder Recordings
0
0.0
Sep 17, 2020
09/20
by
DIZZY GILLESPIE and his Sextet; S. Stitt; M. Jackson; R. Brown; K. Clark; A. Haig; D. Gillespie; Ray Brown
audio
eye 0
favorite 0
comment 1
Performer: DIZZY GILLESPIE and his Sextet; S. Stitt; M. Jackson; R. Brown; K. Clark; A. Haig; D. Gillespie Writer: Ray Brown Instrumental; alto sax; vibraphone; bass; drums; piano; trumpet. Digitized at 78 revolutions per minute. Four stylii were used to transfer this record. They are 3.5mil truncated eliptical, 2.3mil truncated conical, 2.8mil truncated conical, 3.3mil truncated conical. These were recorded flat and then also equalized with Turnover: 450.0, Rolloff: -10.5. The preferred...
( 1 reviews )
Topics: 78rpm, Jazz
Source: 78
78 RPMs and Cylinder Recordings
0
0.0
Sep 17, 2020
09/20
by
DIZZY GILLESPIE and his Sextet; S. Stitt; M. Jackson; R. Brown; K. Clark; A. Haig; D. Gillespie; Gillespie; Fuller
audio
eye 0
favorite 0
comment 1
Performer: DIZZY GILLESPIE and his Sextet; S. Stitt; M. Jackson; R. Brown; K. Clark; A. Haig; D. Gillespie Writer: Gillespie; Fuller Instrumental; alto sax; vibraphone; bass; drums; piano; trumpet. Digitized at 78 revolutions per minute. Four stylii were used to transfer this record. They are 3.5mil truncated eliptical, 2.3mil truncated conical, 2.8mil truncated conical, 3.3mil truncated conical. These were recorded flat and then also equalized with Turnover: 450.0, Rolloff: -10.5. The...
( 1 reviews )
Topics: 78rpm, Jazz
Source: 78
21
21
Sep 24, 2013
09/13
by
T. G. Lee; C. Rochow; R. Martin; T. K. Clark; R. C. Forrey; N. Balakrishnan; P. C. Stancil; D. R. Schultz; A. Dalgarno; G. J. Ferland
texts
eye 21
favorite 0
comment 0
The two most recently published potential energy surfaces (PESs) for the HeH$_2$ complex, the so-called MR (Muchnick and Russek) and BMP (Boothroyd, Martin, and Peterson) surfaces, are quantitatively evaluated and compared through the investigation of atom-diatom collision processes. The BMP surface is expected to be an improvement, approaching chemical accuracy, over all conformations of the PES compared to that of the MR surface. We found significant differences in inelastic rovibrational...
Source: http://arxiv.org/abs/astro-ph/0412201v1
Boston Public Library 78rpm Collection
76
76
Oct 23, 2018
10/18
by
A. Haig; R. Brown; K. Clark; Gillespie; Brown; Dizzy Gillespie and his Orchestra; Ray Brown; M. Jackson; Dizzy Gillespie; S. Stitt; D. Gillespie; Dizzy Gillespie Sextet
audio
eye 76
favorite 0
comment 1
Performer: Dizzy Gillespie Sextet; S. Stitt; M. Jackson; D. Gillespie; R. Brown; K. Clark; A. Haig; Dizzy Gillespie and his Orchestra; Ray Brown Writer: Dizzy Gillespie; Gillespie; Brown Instrumental; alto sax; vibraphone; trumpet; bass; drums; piano; Bass. Digitized at 78 revolutions per minute. Four stylii were used to transfer these records. They are 3.8mil truncated conical, 2.3mil truncated conical, 2.8mil truncated conical, 3.3mil truncated conical. These were recorded flat and then also...
( 1 reviews )
Topics: Jazz, 78rpm
Source: 78
"Journal of the Society of Arts, Vol. 13, no. 628" is an article from The Journal of the Society of Arts, Volume 13 . View more articles from The Journal of the Society of Arts . View this article on JSTOR . View this article's JSTOR metadata . You may also retrieve all of this items metadata in JSON at the following URL: https://archive.org/metadata/jstor-41323736
Source: http://www.jstor.org/stable/10.2307/41323736
84
84
Sep 17, 2013
09/13
by
F. Aubin; M. Auger; E. Behnke; B. Beltran; K. Clark; X. Dai; A. Davour; M. -H. Genest; G. Giroux; R. Gornea; R. Faust; C. B. Krauss; C. Leroy; L. Lessard; I. Levine; C. Levy; J. -P. Martin; T. Morlat; A. J. Noble; P. Nadeau; M. -C. Piro; S. Pospisil; T. Shepherd; J. Sodomka; N. Starinski; I. Stekl; C. Storey; U. Wichoski; V. Zacek
texts
eye 84
favorite 0
comment 0
The PICASSO collaboration observed for the first time a significant difference between the acoustic signals induced by neutrons and alpha particles in a detector based on superheated liquids. This new discovery offers the possibility of improved background suppression and could be especially useful for dark matter experiments. This new effect may be attributed to the formation of multiple bubbles on alpha tracks, compared to single nucleations created by neutron induced recoils.
Source: http://arxiv.org/abs/0807.1536v2
1
1.0
Jun 30, 2018
06/18
by
R. Alves; S. Andringa; S. Bradbury; J. Carvalho; D. Chauhan; K. Clark; I. Coulter; F. Descamps; E. Falk; L. Gurriana; C. Kraus; G. Lefeuvre; A. Maio; J. Maneira; M. Mottram; S. Peeters; J. Rose; L. Seabra; J. Sinclair; P. Skensved; J. Waterfield; R. White; J. R. Wilson
texts
eye 1
favorite 0
comment 0
A light injection system using LEDs and optical fibres was designed for the calibration and monitoring of the photomultiplier array of the SNO+ experiment at SNOLAB. Large volume, non-segmented, low-background detectors for rare event physics, such as the multi-purpose SNO+ experiment, need a calibration system that allow an accurate and regular measurement of the performance parameters of their photomultiplier arrays, while minimising the risk of radioactivity ingress. The design implemented...
Topics: Physics, High Energy Physics - Experiment, Instrumentation and Detectors
Source: http://arxiv.org/abs/1411.4830
23
23
Sep 18, 2013
09/13
by
HyperCP Collaboration; D. Rajaram; R. A. Burnstein; A. Chakravorty; Y. C. Chen; W. -S. Choong; K. Clark; E. C. Dukes; C. Durandet; J. Felix; Y. Fu; G. Gidal; H. R. Gustafson; T. Holmstrom; M. Huang; C. James; C. M. Jenkins; T. D. Jones; D. M. Kaplan; M. J. Longo; L. C. Lu; W. Luebke; K. -B. Luk; K. S. Nelson; H. K. Park; J. -P. Perroud; H. A. Rubin; J. Volk; C. G. White; S. L. White; P. Zyla
texts
eye 23
favorite 0
comment 0
A sensitive search for the lepton-number-violating decay $\Xi^-\to p \mu^-\mu^-$ has been performed using a sample of $\sim10^9$ $\Xi^-$ hyperons produced in 800 GeV/$c$ $p$-Cu collisions. We obtain $\mathcal{B}(\Xi^-\to p \mu^-\mu^-) < 4.0\times 10^{-8}$ at 90% confidence, improving on the best previous limit by four orders of magnitude.
Source: http://arxiv.org/abs/hep-ex/0505025v1
37
37
Sep 22, 2013
09/13
by
H. K. Park; R. A. Burnstein; A. Chakravorty; Y. C. Chen; W. S. Choong; K. Clark; E. C. Dukes; C. Durandet; J. Felix; Y. Fu; G. Gidal; H. R. Gustafson; T. Holmstrom; M. Huang; C. James; C. M. Jenkins; T. Jones; D. M. Kaplan; L. M. Lederman; N. Leros; M. J. Longo; F. Lopez; L. C. Lu; W. Luebke; K. B. Luk; K. S. Nelson; J. -P. Perroud; D. Rajaram; H. A. Rubin; J. Volk; C. G. White; S. L. White; P. Zyla
texts
eye 37
favorite 0
comment 0
We report the first evidence for the decay Sigma+ -> p mu+ mu- from data taken by the HyperCP experiment(E871) at Fermilab. Based on three observed events, the branching ratio is B(Sigma+ -> p,mu+,mu-) = [8.6 +6.6,-5.4(stat) +/-5.5(syst)] x 10**-8. The narrow range of dimuon masses may indicate that the decay proceeds via a neutral intermediate state, Sigma+ -> p P0, P0 -> mu+ mu-, with a P0 mass of 214.3 +/- 0.5 MeV/c**2 and branching ratio B(Sigma+ -> p P0; P0 -> mu+ mu-) =...
Source: http://arxiv.org/abs/hep-ex/0501014v2
35
35
Sep 21, 2013
09/13
by
S. Archambault; F. Aubin; M. Auger; M. Beleshi; E. Behnke; J. Behnke; B. Beltran; K. Clark; X. Dai; A. Davour; F. Debris. J. Farine; M. -H. Genest; G. Giroux; R. Gornea; R. Faust; H. Hinnefeld; A. Kamaha; C. B. Krauss; M. Lafrenière; M. Laurin; I. Lawson; C. Leroy; C. Lévy; L. Lessard; I. Levine; J. -P. Martin; S. Kumaratunga; R. MacDonald; R. Nadeau; A. Noble; M. -C. Piro; S. Pospisil; N. Starinski; I. Stekl; N. Vander Werf; U. Wichoski; V. Zacek
texts
eye 35
favorite 0
comment 0
We report new results obtained in calibrations of superheated liquid droplet detectors used in dark matter searches with different radiation sources (n,$\alpha$,$\gamma$). In particular, detectors were spiked with alpha-emitters located inside and outside the droplets. It is shown that the responses are different, depending on whether alpha particles or recoil nuclei create the signals. The energy thresholds for $\alpha$-emitters are compared with test beam measurements using mono-energetic...
Source: http://arxiv.org/abs/1011.4553v1
31
31
Sep 18, 2013
09/13
by
HyperCP Collaboration; L. C. Lu; R. A. Burnstein; A. Chakravorty; Y. C. Chen; W. -S. Choong; K. Clark; E. C. Dukes; C. Durandet; J. Felix; Y. Fu; G. Gidal; H. R. Gustafson; T. Holmstrom; M. Huang; C. James; C. M. Jenkins; T. D. Jones; D. M. Kaplan; M. J. Longo; W. Luebke; K. -B. Luk; K. S. Nelson; H. K. Park; J. -P. Perroud; D. Rajaram; H. A. Rubin; J. Volk; C. G. White; S. L. White; P. Zyla
texts
eye 31
favorite 0
comment 0
The alpha decay parameter in the process Omega-minus -> Lambda + K-minus has been measured from a sample of 4.50 million unpolarized Omega-minus decays recorded by the HyperCP (E871) experiment at Fermilab and found to be [1.78 +/- 0.19(stat) +/- 0.16(syst)]{\times}10^{-2}. This is the first unambiguous evidence for a nonzero alpha decay parameter, and hence parity violation, in the Omega-minus -> Lambda + K-minus decay.
Source: http://arxiv.org/abs/hep-ex/0505010v1
35
35
Sep 20, 2013
09/13
by
M. J. Longo; R. A. Burnstein; A. Chakravorty; Y. C. Chen; W. S. Choong; K. Clark; E. C. Dukes; C. Durandet; J. Felix; Y. Fu; G. Gidal; H. R. Gustafson; T. Holmstrom; M. Huang; C. James; C. M. Jenkins; T. Jones; D. M. Kaplan; L. M. Lederman; N. Leros; F. Lopez; L. C. Lu; W. Luebke; K. B. Luk; K. S. Nelson; H. K. Park; J. -P. Perroud; D. Rajaram; H. A. Rubin; J. Volk; C. G. White; S. White; P. Zyla
texts
eye 35
favorite 0
comment 0
We have searched for Theta+(1.54) -> K0,p decays using data from the 1999 run of the HyperCP experiment at Fermilab. We see no evidence for a narrow peak in the K0,p mass distribution near 1.54 GeV/c among 106,000 K0,p candidates, and obtain an upper limit for the fraction of Theta+(1.54) to K0,p candidates of
Source: http://arxiv.org/abs/hep-ex/0410027v2
37
37
Sep 21, 2013
09/13
by
HyperCP Collaboration; O. Kamaev; N. Solomey; R. A. Burnstein; A. Chakravorty; Y. C. Chen; W. -S. Choong; K. Clark; E. C. Dukes; C. Durandet; J. Felix; Y. Fu; G. Gidal; H. R. Gustafson; T. Holmstrom; M. Huang; C. James; C. M. Jenkins; T. D. Jones; D. M. Kaplan; M. J. Longo; L. C. Lu; W. Luebke; K. -B. Luk; K. S. Nelson; H. K. Park; J. -P. Perroud; D. Rajaram; H. A. Rubin; J. Volk; C. G. White; S. L. White; P. Zyla
texts
eye 37
favorite 0
comment 0
We report a new measurement of the decay \Omega^- \to \Xi^- \pi^+ \pi^- with 76 events and a first observation of the decay \Omega^+ \to \Xi^+ \pi^+ \pi^- with 24 events, yielding a combined branching ratio (3.74 ^{+0.67}_{-0.56}) \times 10^{-4}. This represents a factor 25 increase in statistics over the best previous measurement. No evidence is seen for CP violation, with B(\Omega^- \to \Xi^- \pi^+ \pi^-)=4.04^{+0.83}_{-0.71} \times 10^{-4} and B(\Omega^+ \to \Xi^+ \pi^+...
Source: http://arxiv.org/abs/1008.4405v1
29
29
Sep 24, 2013
09/13
by
HyperCP Collaboration; T. Holmstrom; N. Leros; R. A. Burnstein; A. Chakravorty; A. Chan; Y. C. Chen; W. S. Choong; K. Clark; E. C. Dukes; C. Durandet; J. Felix; Y. Fu; G. Gidal; P. Gu; H. R. Gustafson; C. Ho; M. Huang; C. James; C. M. Jenkins; T. Jones; D. M. Kaplan; L. M. Lederman; M. J. Longo; F. Lopez; L. C. Lu; W. Luebke; K. B. Luk; K. S. Nelson; H. K. Park; J. P. Perroud; D. Rajaram; H. A. Rubin; P. K. Teng; J. Volk; C. G. White; S. L. White; P. Zyla
texts
eye 29
favorite 0
comment 0
We have compared the proton and antiproton angular distributions in 117 million Xi-minus -> Lambda + pi-minus -> proton + pi-minus + pi-minus and 41 million anti-Xi-minus -> anti-Lamba + pi-plus -> antiproton + pi-plus + pi-plus decays using a subset of the data from the HyperCP experiment (E871) at Fermilab. We find no evidence of CP violation, with the direct-CP-violating parameter $A_{\Xi\Lambda} = \frac{\alpha_{\Xi}\alpha_{\Lambda} -...
Source: http://arxiv.org/abs/hep-ex/0412038v1
25
25
Sep 20, 2013
09/13
by
HyperCP collaboration; R. A. Burnstein; A. Chakravorty; A. Chan; Y. C. Chen; W. -S. Choong; K. Clark; E. C. Dukes; C. Durandet; J. Felix; R. Fuzesy; G. Gidal; P. Gu; H. R. Gustafson; C. Ho; T. Holmstrom; M. Huang; C. James; C. M. Jenkins; T. D. Jones; D. M. Kaplan; L. M. Lederman; N. Leros; M. J. Longo; F. Lopez; L. C. Lu; W. Luebke; K. -B. Luk; K. S. Nelson; H. K. Park; J. -P. Perroud; D. Rajaram; H. A. Rubin; P. K. Teng; B. Turko; J. Volk; C. G. White; S. L. White; P. Zyla
texts
eye 25
favorite 0
comment 0
The HyperCP experiment (Fermilab E871) was designed to search for rare phenomena in the decays of charged strange particles, in particular CP violation in $\Xi$ and $\Lambda$ hyperon decays with a sensitivity of $10^{-4}$. Intense charged secondary beams were produced by 800 GeV/c protons and momentum-selected by a magnetic channel. Decay products were detected in a large-acceptance, high-rate magnetic spectrometer using multiwire proportional chambers, trigger hodoscopes, a hadronic...
Source: http://arxiv.org/abs/hep-ex/0405034v1
33
33
Sep 18, 2013
09/13
by
HyperCP Collaboration; Y. C. Chen; R. A. Burnstein; A. Chakravorty; A. Chan; W. S. Choong; K. Clark; E. C. Dukes; C. Durandet; J. Felix; G. Gidal; P. Gu; H. R. Gustafson; C. Ho; T. Holmstrom; M. Huang; C. James; C. M. Jenkins; D. M. Kaplan; L. M. Lederman; N. Leros; M. J. Longo; F. Lopez; L. C. Lu; W. Luebke; K. B. Luk; K. S. Nelson; H. K. Park; J. P. Perroud; D. Rajaram; H. A. Rubin; P. K. Teng; J. Volk; C. G. White; S. L. White; P. Zyla
texts
eye 33
favorite 0
comment 0
We have measured the alpha parameter of the Omega- to Lambda K- decay using data collected with the HyperCP spectrometer during the 1997 fixed-target run at Fermilab. Analyzing a sample of 0.96 million Omega- to Lambda K^-, Lambda to p pi- decays, we obtain alpha_Omega*alpha_Lambda = [1.33+/-0.33(stat)+/-0.52(syst)] x 10^{-2}. With the accepted value of alpha_Lambda, alpha_Omega is found to be [2.07+/-0.51(stat)+/-0.81(syst)] x 10^{-2}.
Source: http://arxiv.org/abs/hep-ex/0502043v1
33
33
Sep 20, 2013
09/13
by
D. S. Akerib; X. Bai; S. Bedikian; A. Bernstein; A. Bolozdynya; A. Bradley; S. Cahn; D. Carr; J. J. Chapman; K. Clark; T. Classen; A. Curioni; C. E. Dahl; S. Dazeley; L. deViveiros; M. Dragowsky; E. Druszkiewicz; S. Fiorucci; R. J. Gaitskell; C. Hall; C. Faham; B. Holbrook; L. Kastens; K. Kazkaz; J. Kwong; R. Lander; D. Leonard; D. Malling; R. Mannino; D. N. McKinsey; D. Mei; J. Mock; M. Morii; J. Nikkel; P. Phelps; T. Shutt; W. Skulski; P. Sorensen; J. Spaans; T. Steigler; R. Svoboda; M. Sweany; J. Thomson; M. Tripathi; N. Walsh; R. Webb; J. White; F. L. H. Wolfs; M. Woods; C. Zhang
texts
eye 33
favorite 0
comment 0
The LUX (Large Underground Xenon) detector is a two-phase xenon Time Projection Chamber (TPC) designed to search for WIMP-nucleon dark matter interactions. As with all noble element detectors, continuous purification of the detector medium is essential to produce a large ($>$1ms) electron lifetime; this is necessary for efficient measurement of the electron signal which in turn is essential for achieving robust discrimination of signal from background events. In this paper we describe the...
Source: http://arxiv.org/abs/1207.3665v2
