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84

Feb 10, 2016
02/16

by
E Rodríguez

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56

Sep 21, 2013
09/13

by
E. Rodriguez-Jauregui

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We argue here why CP violating phase Phi in the quark mixing matrix is maximal, that is, Phi=90 degrees. In the Standard Model CP violation is related to the Jarlskog invariant J, which can be obtained from non commuting Hermitian mass matrices. In this article we derive the conditions to have Hermitian mass matrices which give maximal Jarlskog invariant J and maximal CP violating phase Phi. We find that all squared moduli of the quark mixing elements have a singular point when the CP violation...

Source: http://arxiv.org/abs/hep-ph/0104092v1

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219

May 10, 2012
05/12

by
Clara E. Rodriguez

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Topics: Hispanic American motion picture actors and actresses -- Biography, Hispanic Americans in the...

12
12

Feb 14, 2020
02/20

by
E Rodríguez; M Weigend

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eye 12

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12

Feb 14, 2020
02/20

by
E Rodríguez; M Weigend

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20

Feb 29, 2020
02/20

by
A Hofreiter; E Rodríguez

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17

Feb 14, 2020
02/20

by
M Weigend; E Rodríguez

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7.0

Mar 13, 2021
03/21

by
Luis E. Rodriguez (Luis)

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This is created from the specs Makerbeam posted on Scribd . It is 40 mm tall but you can modify the sketchup file to the 10cm (100mm) that Makerbeam beams will be avaiable in. Makerbeam - http://makerbeam.com/whatsnext.html Scribd post - http://www.kickstarter.com/projects/701662757/makerbeam-an-open-source-building-kit/posts/18107 UPDATE: Uploaded a 10cm beam in .stl format.

Topics: thingiverse, T-slot, makerbeam, makerbot, stl, sketchup, Other

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16

Feb 14, 2020
02/20

by
M Weigend; E Rodríguez

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10
10.0

Mar 19, 2021
03/21

by
Luis E. Rodriguez (Luis)

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This is the LED ornament topper that was a collaboration between CCCKC Hackerspace and Hammerspace Hobby & Community Toolshop (our new home) in Kansas City. It is a fun, quick 4 soldering point ornament insert. The LED cycles between several colors and modes with each on and off cycle. We decided to keep it awesome by printing the body and using only two components (LED and battery holder) and copper wire to extend the leads to create the ornament hanger and integrated switch! We created...

Topics: electronics, 123D, xmas, thingiverse, ornament, Other, LED, stl

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43

Sep 22, 2013
09/13

by
A. Mondragon; E. Rodriguez-Jauregui

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Different ansaetze for the breaking of the flavour permutational symmetry according to S(3)L X S(3)R in S(2)L X S(2) give different Hermitian mass matrices of the same modified Fritzsch type, which differ in the symmetry breaking pattern. In this work we obtain a clear and precise indication on the preferred symmetry breaking scheme from a fit of the predicted theoretical Vckm to the experimentally determined absolute values of the elements of the CKM matrix. The preferred scheme leads to...

Source: http://arxiv.org/abs/hep-ph/9807214v2

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49

Sep 17, 2013
09/13

by
Angel Carocca; Rubi E. Rodriguez

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The object of this paper is to prove some general results about rational idempotents for a finite group $G$ and deduce from them geometric information about the components that appear in the decomposition of the Jacobian variety of a curve with $G-$action. We give an algorithm to find explicit primitive rational idempotents for any $G$, as well as for rational projectors invariant under any given subgroup. These explicit constructions allow geometric descriptions of the factors appearing in the...

Source: http://arxiv.org/abs/math/0305328v1

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102

Jul 20, 2013
07/13

by
A. Mondragon; E. Rodriguez-Jauregui

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The phase equivalence of the theoretical mixing matrix ${\bf V}^{th}$ derived from the breaking of the flavour permutational symmetry and the standard parametrization ${\bf V}^{PDG}$ advocated by the Particle Data Group is explicitly exhibited. From here, we derive exact explicit expressions for the three mixing angles $\theta_{12}$, $\theta_{13}$, $\theta_{23}$, and the CP violating phase $\delta_{13}$ in terms of the quark mass ratios $(m_{u}/m_{t}, m_{c}/m_{t}, m_{d}/m_{b}, m_{s}/m_{b})$ and...

Source: http://arxiv.org/abs/hep-ph/9906429v2

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14

Feb 14, 2020
02/20

by
M Weigend; E Rodríguez R.

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73

Sep 22, 2013
09/13

by
A. Mondragon; E. Rodriguez-Jauregui

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The phase equivalence of the theoretical quark mixing matrix ${\bf V}^{th}$ derived from the breaking of the flavour permutational symmetry and the phenomenological parametrizations ${\bf V}^{PDG}$ and ${\bf V}^{KM}$ is explicitly exhibited. From here, we derive exact explicit expressions for the three mixing angles and the CP violating phase of the two phenomenological parametrizations in terms of the quark mass ratios $(m_{u}/m_{t}, m_{c}/m_{t}, m_{d}/m_{b}, m_{s}/m_{b})$ and the parameters...

Source: http://arxiv.org/abs/hep-ph/0003104v1

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36

Jul 20, 2013
07/13

by
A. Mondragón; E. Rodríguez-Jáuregui

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This paper has been withdrawn by the authors, and instead we have replaced hep-ph/9807214 by this new version.

Source: http://arxiv.org/abs/hep-ph/9902240v2

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56

Sep 19, 2013
09/13

by
A. Mondragon; E. Rodriguez-Jauregui

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Recent interest in flavour or horizontal symmetry building (mass textures) has been spurred mainly by the large top mass and, hence, the strong hierarchy in quark masses. Recently, various symmetry breaking schemes have been proposed based on the discrete, non-Abelian group S3L x S3R, which is broken according to S3L x S3R > S3_diag > S2_diag. The group S3 treats three objects symmetrically, while the hierarchical nature of the Yukawa matrices is a consequence of the representation...

Source: http://arxiv.org/abs/hep-ph/9804267v1

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44

May 14, 2013
05/13

by
edited by Clara E. Rodríguez.

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Topic: Hispanic Americans and mass media

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44

Sep 22, 2013
09/13

by
H. Perez Rojas; E. Rodriguez Querts

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Our aim is to study the electron-positron vacuum pressures in presence of a strong magnetic field $B$. To that end, we obtain a general energy-momentum tensor, depending on external parameters, which in the zero temperature and zero density limit leads to vacuum expressions which are approximation-independent. Anisotropic pressures arise, and in the tree approximation of the magnetic field case, the pressure along $B$ is positive, whereas perpendicular to $B$ it is negative. Due to the common...

Source: http://arxiv.org/abs/hep-ph/0603254v1

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73

Sep 17, 2013
09/13

by
H. Pérez Rojas; E. Rodriguez Querts

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Previous results from the authors concerning the arising a tiny photon anomalous paramagnetic moment are also interpreted as a red-shift in analogy to the gravitational known effect. It is due to the photon interaction with the magnetized virtual electron-positron background which withdraw transverse momentum from photons and is polarization-dependent. If the photon frequency red-shift implies a change in time, a clock would go faster for increasing magnetic field intensity.

Source: http://arxiv.org/abs/1003.3843v1

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18

Jun 28, 2018
06/18

by
Ruben A. Hidalgo; Rubi E. Rodriguez

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Recently, Barraza-Rojas have described the action of the full automorphisms group on the Fermat curve of degree $p$, for $p$ a prime integer, and obtained the group algebra decomposition of the corresponding Jacobian variety. In this short note we observe that the factors in such a decomposition are given by the Jacobian varieties of certain $p$-gonal curves.

Topics: Mathematics, Algebraic Geometry

Source: http://arxiv.org/abs/1508.00401

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78

Jul 20, 2013
07/13

by
H. Perez Rojas; E. Rodriguez Querts

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Our paper Phys. Rev. D \textbf{79}, 093002 (2009), in which it was shown the paramagnetic behavior of photons propagating in magnetized vacuum, is criticized in Phys. Rev. D \textbf{81}, 105019, (2010) and even claimed that the photon has a diamagnetic component. Here it is shown that such criticism is inadequate and that the alleged "perpendicular component" is due to a mistake in differentiating a vanishing term with regard to the magnetic field $B$, or either by mistaking the...

Source: http://arxiv.org/abs/1007.4841v2

12
12

Oct 9, 2019
10/19

by
Sara G. Tressens; Manuela E. Rodríguez

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36

Sep 21, 2013
09/13

by
H. Perez Rojas; E. Rodriguez Querts

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We study the electron-positron vacuum in a strong magnetic field $B$ in parallel with Casimir effect. Use is made of the energy-momentum tensor, taken as the zero temperature and zero density limit of the relativistic quantum statistical tensor. In both magnetic field and Casimir cases it is shown the arising of anisotropic pressures. In the first case the pressure transversal to the field $B$ is negative, whereas along $B$ an usual positive pressure arises. Similarly, in addition to the usual...

Source: http://arxiv.org/abs/hep-ph/0402213v2

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50

Sep 21, 2013
09/13

by
H. Perez Rojas; E. Rodriguez Querts

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A photon exhibits a tiny anomalous magnetic moment $\mu_{\gamma}$ due to its interaction with an external constant magnetic field in vacuum through the virtual electron-positron background. It is paramagnetic ($\mu_{\gamma}>0$) in the whole region of transparency, i.e. below the first threshold energy for pair creation and has a maximum near this threshold. The photon magnetic moment is different for eigenmodes polarized along and perpendicular to the magnetic field. Explicit expressions are...

Source: http://arxiv.org/abs/0808.2955v4

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65

Sep 19, 2013
09/13

by
H. Perez Rojas; E. Rodriguez Querts

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The rotation of the polarization vector for light propagating perpendicular to an external constant external magnetic field $B$, is calculated in quantum vacuum, where it leads to different photon eigenmodes of the magnetized photon self-energy tensor for polarizations along and orthogonal to $B$ (Cotton-Mouton effect in QED vacuum). Its analogies and differences with Faraday effect are discussed and both phenomena are calculated for a relativistic electron gas at low densities, by starting...

Source: http://arxiv.org/abs/0708.2215v4

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69

Sep 21, 2013
09/13

by
H. Perez Rojas; E. Rodriguez Querts

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We start from the analytical expression of the eigenvalues $\kappa^{(i)}$ of the photon self-energy tensor in an external constant magnetic field $B$ calculated by Batalin Shabad in the Furry representation, and in the one-loop approximation. We expand in power series of the external field and in terms of the squared photon transverse momentum $z_2$ and (minus) transverse energy $z_1=k^2-z_2$, in terms of which are expressed $\kappa^{(i)}$. A general expression is given for the photon anomalous...

Source: http://arxiv.org/abs/0808.2958v2

5
5.0

Jun 29, 2018
06/18

by
Hector K. Vivanco; Efrain E. Rodriguez

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The iron chalcogenides FeSe and FeS are superconductors composed of two-dimensional sheets held together by van der Waals interactions, which makes them prime candidates for the intercalation of various guest species. We review the intercalation chemistry of FeSe and FeS superconductors and discuss their synthesis, structure, and physical properties. Before we review the latest work in this area, we provide a brief background on the intercalation chemistry of other inorganic materials that...

Topics: Superconductivity, Condensed Matter

Source: http://arxiv.org/abs/1603.02334

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62

Sep 20, 2013
09/13

by
H. Perez Rojas; E. Rodriguez Querts

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Previous results from the authors concerning the arising a tiny photon anomalous paramagnetic moment $\mu_{\gamma}$ due to its interaction with a magnetized virtual electron-positron background are complemented and discussed. It is argued that such magnetic moment it cannot be a linear function of the angular momentum and that there is no room for the existence of an hypothetical perpendicular component, as recently claimed in the literature. It is discussed that in the region beyond the first...

Source: http://arxiv.org/abs/1002.3269v2

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166

Jul 20, 2013
07/13

by
H. Perez Rojas; E. Rodriguez Querts

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We study vacuum in a strong magnetic field. It shows a nonlinear response, as a ferromagnetic medium. Anisotropic pressures arise, and a negative pressure is exerted in the direction perpendicular to the field. The analogy of this effect with the Casimir effect is analyzed. The vacuum transverse pressure is found to be of the same order of the statistical pressure for $B\sim10^{15}G$ and $N\sim10^{33}electrons/cm^{3}$. Vacuum interaction with the field is studied also for $B\sim10^{16}G$ and...

Source: http://arxiv.org/abs/hep-ph/0406284v2

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3.0

Jun 30, 2018
06/18

by
Sebastián Reyes-Carocca; Rubí E. Rodríguez

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In this short paper we generalise a theorem due to Kani and Rosen on decomposition of Jacobian varieties of Riemann surfaces with group action. This generalisation extends the set of Jacobians for which it is possible to obtain an isogeny decomposition where all the factors are Jacobians.

Topics: Algebraic Geometry, Mathematics

Source: http://arxiv.org/abs/1702.00484

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60

Sep 20, 2013
09/13

by
H. Perez Rojas; E. Rodriguez Querts

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We consider self-magnetization of charged and neutral vector bosons bearing a magnetic moment in a gas and in vacuum. For charged vector bosons (W bosons) a divergence of the magnetization in both the medium and the electroweak vacuum occurs for the critical field B=B_{wc}=m_{w}^{2}/e. For B>B_{wc} the system is unstable. This behavior suggests the occurrence of a phase transition at B=B_{c}, where the field is self-consistently maintained. This mechanism actually prevents $B$ from reaching...

Source: http://arxiv.org/abs/hep-ph/0612349v1

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14

Feb 14, 2020
02/20

by
M Weigend; E Rodríguez; N Dostert

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eye 14

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favorite 0

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comment 0

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17

Feb 29, 2020
02/20

by
S Leiva G.; E Rodríguez; J Campos

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eye 17

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favorite 0

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comment 0

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68

Sep 22, 2013
09/13

by
Angel Carocca; Herbert Lange; Rubi E. Rodriguez

texts

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We construct and study two series of curves whose Jacobians admit complex multiplication. The curves arise as quotients of Galois coverings of the projective line with Galois group metacyclic groups $G_{q,3}$ of order $3q$ with $q \equiv 1 \mod 3$ an odd prime, and $G_m$ of order $2^{m+1}$. The complex multiplications arise as quotients of double coset algebras of the Galois groups of these coverings. We work out the CM-types and show that the Jacobians are simple abelian varieties.

Source: http://arxiv.org/abs/0906.4185v1

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24

Feb 14, 2020
02/20

by
E Rodríguez R.; M Weigend; N Dostert

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Performer: Chinin de Triana Writer: E. Rodriguez; P. Oltra Bolero; Flamenco; y Conjunto. Digitized at 78 revolutions per minute. Four stylii were used to transfer this record. They are 3.5 mil truncated eliptical, 2.3 mil truncated conical, 2.8 mil truncated conical, 3.3 mil truncated conical. These were recorded flat and then also equalized with Turnover: 400.0, Rolloff: -12.0. The preferred versions suggested by an audio engineer at George Blood, L.P. have been copied to have the more...

( 1 reviews )

Topics: 78rpm, Latin

Source: 78

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53

Sep 22, 2013
09/13

by
Ai-Ying Zhou; Zong-Li Liu; E. Rodríguez

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We present the results of a three-year photometric study of the $\delta$ Scuti star UV Trianguli. Our data sets consist of 9378 differential measurements in Johnson V together with a few data collected into the Str\"{o}mgren {\em uvby$\beta$} system. UV Tri is at least a biperiodic variable. The two best-fitting frequencies, $f_1$=9.3298 d$^{-1}$ and $f_2$=10.8513 d$^{-1}$, are still not the complete set of pulsation frequencies representing the star's light variations. A suspected third...

Source: http://arxiv.org/abs/astro-ph/0205421v1

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58

Sep 23, 2013
09/13

by
C. Stock; E. E. Rodriguez; M. A. Green

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Using neutron inelastic scattering, we investigate the role of interstitial iron on the low-energy spin fluctuations in powder samples of Fe_{1+x}Te_{0.7}Se_{0.3}. We demonstrate how combining the principle of detailed balance along with measurements at several temperatures allows us to subtract both temperature-independent and phonon backgrounds from S(Q,\omega) to obtain purely magnetic scattering. For small values of interstitial iron (x=0.009(3)), the sample is superconducting (T_{c}=14 K)...

Source: http://arxiv.org/abs/1202.4152v1

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83

Sep 18, 2013
09/13

by
A. Ivanchik; P. Petitjean; E. Rodriguez; D. Varshalovich

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The possible cosmological variation of the proton-to-electron mass ratio was estimated by measuring the H_2 wavelengths in the high-resolution spectrum of the quasar Q~0347-382. Our analysis yielded an estimate for the possible deviation of \mu value in the past, 10 Gyr ago: for the unweighted value $\Delta \mu / \mu = (3.0\pm2.4)\times10^{-5}$; for the weighted value \[ \Delta \mu / \mu = (5.02\pm1.82)\times10^{-5}\] Since the significance of the both results does not exceed 3$\sigma$, further...

Source: http://arxiv.org/abs/astro-ph/0210299v1

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5.0

Jun 30, 2018
06/18

by
Lisandro A. Raviola; Oscar Zárate; Eduardo E. Rodríguez

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We study the ascending motion of a disk rolling on an incline when its center of mass lies outside the disk axis. The problem is suitable as laboratory project for a first course in mechanics at the undergraduate level and goes beyond typical textbook problems about bi-dimensional rigid body motions. We develop a theoretical model for the disk motion based on mechanical energy conservation and compare its predictions with experimental data obtained by digital video recording. Using readily...

Topics: Physics, Physics Education

Source: http://arxiv.org/abs/1403.7220

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10.0

Jun 28, 2018
06/18

by
Joseph E. Rodriguez; Joshua Pepper; Keivan G. Stassun

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Using time-series photometry from the Kilodegree Extremely Little Telescope (KELT) exoplanet survey, we are looking for eclipses of stars by their protoplanetary disks, specifically in young stellar associations. To date, we have discovered two previously unknown, large dimming events around the young stars RW Aurigae and V409 Tau. We attribute the dimming of RW Aurigae to an occultation by its tidally disrupted disk, with the disruption perhaps resulting from a recent flyby of its binary...

Topics: Solar and Stellar Astrophysics, Astrophysics

Source: http://arxiv.org/abs/1509.04351

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5.0

Jun 30, 2018
06/18

by
D. Díaz-Fraile; E. Rodríguez; P. J. Amado

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A photometric variability study of a sample of northern field stars, which previously classified as either PMS or Herbig Ae/Be objects, has been undertaken with the purpose of detecting {\delta} Scuti-type pulsations. Determination of physical parameters for these stars has also been carried out to locate them on the HR diagram and check the instability strip for this type of pulsators. Multichannel photomultiplier and CCD time series photometry in the uvby Str\"omgren and BVI Johnson...

Topics: Astrophysics, Solar and Stellar Astrophysics

Source: http://arxiv.org/abs/1407.0391

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78

Sep 21, 2013
09/13

by
S. O. Valenzuela; G. A. Jorge; E. Rodriguez

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Repulsive and attractive forces are both possible between a superconducting sample and a permanent magnet, and they can give place to magnetic levitation or free-suspension phenomena, respectively. We show experiments to quantify this magnetic interaction which represents a promising field regarding to short-term technological applications of high temperature superconductors. The measuring technique employs an electronic balance and a rare-earth magnet that induces a magnetic moment in a...

Source: http://arxiv.org/abs/cond-mat/9905084v1

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108

Jul 20, 2013
07/13

by
E. Rodriguez Querts; H. Perez Rojas; A. Perez Martinez

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We discuss the effect of a strong magnetic field in the behavior of the symmetry of an electrically neutral electroweak plasma. We analyze the case of a strong field and low temperatures as compared with the W rest energy. If the magnetic field is large enough, it is self-consistently maintained. Charged vector bosons play the most important role, leading only to a decrease of the symmetry breaking parameter, the symmetry restoration not being possible.

Source: http://arxiv.org/abs/hep-ph/0406260v2

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6.0

Jun 29, 2018
06/18

by
E. Barradas-Guevara; O. Félix-Beltrán; E. Rodríguez-Jáuregui

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Conditions for spontaneous Charge-Parity (CP) violation in the scalar potential sector of general $S(3)$ Higgs-doublet model (3HDM) are analyzed. An analysis of the Higgs sector of the minimal $S(3)$-invariant extension of the Standard Model including CP violation arising from the spontaneous breaking of the electroweak symmetry is presented. This extended Higgs sector with three SU(2) doublets Higgs fields with complex vev's provides an interesting scenario to analyze the Higgs masses...

Topic: High Energy Physics - Phenomenology

Source: http://arxiv.org/abs/1606.07773

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62

Sep 18, 2013
09/13

by
G. Z. Adunas; E. Rodriguez-Milla; D. V. Ahluwalia

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The joint realm of quantum mechanics and the general-relativistic description of gravitation is becoming increasingly accessible to terrestrial experiments and observations. In this essay we study the emerging indications of the violation of equivalence principle (VEP). While the solar neutrino anomaly may find its natural explanation in a VEP, the statistically significant discrepancy observed in the gravitationally induced phases of neutron interferometry seems to be the first indication of a...

Source: http://arxiv.org/abs/gr-qc/0006022v1

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43

Sep 18, 2013
09/13

by
G. Z. Adunas; E. Rodriguez-Milla; D. V. Ahluwalia

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We emphasize that a specific aspect of quantum gravity is the absence of a super-selection rule that prevents a linear superposition of different gravitational charges. As an immediate consequence, we obtain a tiny, but observable, violation of the equivalence principle, provided, inertial and gravitational masses are not assumed to be operationally identical objects. In this framework, the cosmic gravitational environment affects local experiments. A range of terrestrial experiments, from...

Source: http://arxiv.org/abs/gr-qc/0006021v2

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47

Sep 19, 2013
09/13

by
J. Kubo; A. Mondragon; M. Mondragon; E. Rodriguez-Jauregui

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Assuming that the lepton, quark and Higgs fields belong to the three-dimensional reducible representation of the permutation group S_3, we suggest a minimal S_3 invariant extension of the standard model. We find that in the leptonic sector, the exact S_3 x Z_2 symmetry, which allows 6 real independent parameters with two CP-violating phases, is consistent with experimental data and predicts a maximal mixing of the atmospheric neutrinos, and that the third neutrino is the lightest neutrino. With...

Source: http://arxiv.org/abs/hep-ph/0302196v4

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5.0

Jun 30, 2018
06/18

by
E. Barradas-Guevara; O. Félix-Beltrán; E. Rodríguez Jáuregui

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In this work, we analyze the Higgs sector of the minimal $S(3)$-invariant extension of the Standard Model is performed. Considering three Higgs fields, which are SU(2) doublets, and CP invariant, we compute the exact and analytical physical Higgs boson masses in terms of the Higgs potential parameters and the scalar Higgs matrix rotation angle $\theta_S$ and $w_3$ ($\tan\theta_P=\tan\theta_C=\tan^{-1}\omega_3$), related to the pseudoscalar and charged Higgs matrix rotation angles $\theta_P$ and...

Topic: High Energy Physics - Phenomenology

Source: http://arxiv.org/abs/1402.2244