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961
Limits on Neutron Lorentz Violation From Pulsar Timing
, 2006
"... Pulsars are the most accurate naturally occurring clocks, and data about them can be used to set bounds on neutronsector Lorentz violations. If SO(3) rotation symmetry is completely broken for neutrons, then pulsars ’ rotation speeds will vary periodically. Pulsar timing data limits the relevant Lo ..."
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Pulsars are the most accurate naturally occurring clocks, and data about them can be used to set bounds on neutronsector Lorentz violations. If SO(3) rotation symmetry is completely broken for neutrons, then pulsars ’ rotation speeds will vary periodically. Pulsar timing data limits the relevant
Limits on Neutron Lorentz Violation from the Stability of Primary Cosmic Ray Protons
, 805
"... Recent evidence appears to confirm that the ultrahighenergy primary cosmic ray spectrum consists mostly of protons. The fact that these protons can traverse large distances to reach Earth allows us to place bounds on Lorentz violations. The protons neither emit vacuum Cerenkov radiation nor βdeca ..."
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Recent evidence appears to confirm that the ultrahighenergy primary cosmic ray spectrum consists mostly of protons. The fact that these protons can traverse large distances to reach Earth allows us to place bounds on Lorentz violations. The protons neither emit vacuum Cerenkov radiation nor β
Astrophysics LETTERS Testing Lorentz violation with binary pulsars: constraints on standard model extension ∗
, 2012
"... Abstract Under the standard model extension (SME) framework, Lorentz invariance is tested in five binary pulsars: PSR J0737–3039, PSR B1534+12, PSR J1756−2251, PSR B1913+16 and PSR B2127+11C. By analyzing the advance of periastron, we obtain the constraints on a dimensionless combination of SME para ..."
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parameters that is sensitive to timing observations. The results imply no evidence for the break of Lorentz invariance at the 10−10 level, one order of magnitude larger than the previous estimation. Key words: gravitation — relativity — pulsars: individual (PSR 0737−3039, PSR
Lorentz Violation and αDecay
, 812
"... Relating the effective Lorentz violation coefficients for composite particles to the coefficients for their constituent fields is a challenging problem. We calculate the Lorentz violation coefficients relevant to the dynamics of an αparticle in terms of proton and neutron coefficients. The αpartic ..."
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Relating the effective Lorentz violation coefficients for composite particles to the coefficients for their constituent fields is a challenging problem. We calculate the Lorentz violation coefficients relevant to the dynamics of an αparticle in terms of proton and neutron coefficients. The α
Pulsars as Astrophysical Laboratories for Nuclear and Particle
 Physics (Institute of Physics
, 1999
"... A forefront area of research concerns the exploration of the properties of hadronic matter under extreme conditions of temperature and density, and the determination of the equation of state–the relation between pressure, temperature and density–of such matter. Experimentally, relativistic heavyion ..."
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Cited by 113 (21 self)
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ion collision experiments enable physicists to cast a brief glance at hot and ultradense matter for times as little as about 10 −22 seconds. Complementary to this, the matter that exists in the cores of neutron stars, observed as radio pulsars, Xray pulsars, and magnetars, is at low temperatures
GLAST and Lorentz violation
, 805
"... Abstract. We study possible Lorentz violations by means of gammaray bursts (GRB) with special focus on the Large Array Telescope (LAT) of GLAST, where we concentrate on models with linear corrections to the speed of light. We simulate bursts with gtobssim and introduce a Lorentz violating term in t ..."
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Abstract. We study possible Lorentz violations by means of gammaray bursts (GRB) with special focus on the Large Array Telescope (LAT) of GLAST, where we concentrate on models with linear corrections to the speed of light. We simulate bursts with gtobssim and introduce a Lorentz violating term
Spontaneous Lorentz Violation
, 2008
"... In the presence of background fields that spontaneously violate Lorentz invariance, a matterantimatter asymmetry can be generated even in thermal equilibrium. In this paper we systematically investigate models of this type, showing that either highenergy or electroweak versions of baryogenesis are ..."
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In the presence of background fields that spontaneously violate Lorentz invariance, a matterantimatter asymmetry can be generated even in thermal equilibrium. In this paper we systematically investigate models of this type, showing that either highenergy or electroweak versions of baryogenesis
SPONTANEOUS LORENTZ VIOLATION AND BARYOGENESIS
, 2007
"... In the presence of background fields that spontaneously violate Lorentz invariance, a matterantimatter asymmetry can be generated even in thermal equilibrium. In this paper we systematically investigate models of this type, showing that either highenergy or electroweak versions of baryogenesis are ..."
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are possible, depending on the dynamics of the Lorentzviolating fields. We identify two scenarios of interest: baryogenesis from a weakscale pseudoNambuGoldstone boson with intermediatescale baryonnumber violation, and sphaleroninduced baryogenesis driven by a constantmagnitude vector with a latetime
Lorentz Violation and Modified Geodesics
, 2013
"... We propose a modification of proper time, which is dependent on vierbein and spin connection. It explicitly breaks local Lorentz gauge symmetry, while preserving diffeomorphism invariance. In the nonrelativistic limit, the geodesics are consistent with galactic rotation curves without invoking dark ..."
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We propose a modification of proper time, which is dependent on vierbein and spin connection. It explicitly breaks local Lorentz gauge symmetry, while preserving diffeomorphism invariance. In the nonrelativistic limit, the geodesics are consistent with galactic rotation curves without invoking
Lorentz Violation of Quantum Gravity
, 905
"... A quantum gravity theory which becomes renormalizable at short distances due to a spontaneous symmetry breaking of Lorentz invariance and diffeomorphism invariance is studied. A breaking of Lorentz invariance with the breaking patterns SO(3,1) → O(3) and SO(3,1) → O(2), describing 3 + 1 and 2 + 1 ..."
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Cited by 1 (0 self)
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A quantum gravity theory which becomes renormalizable at short distances due to a spontaneous symmetry breaking of Lorentz invariance and diffeomorphism invariance is studied. A breaking of Lorentz invariance with the breaking patterns SO(3,1) → O(3) and SO(3,1) → O(2), describing 3 + 1 and 2 + 1
Results 1  10
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961