scholarly journals Width of photon decay in a magnetic field: Elementary semiclassical derivation and sensitivity to Lorentz violation

2013 ◽  
Vol 87 (10) ◽  
Author(s):  
Petr Satunin
Keyword(s):  
Magnetic Field ◽  
Lorentz Violation ◽  
Photon Decay

scholarly journals Lorentz Violation in Torsional Antenna

2020 ◽  
Author(s):  
Fabio Cardone ◽  
Gianni Albertini ◽  
Domenico Bassani
Keyword(s):  
Magnetic Field ◽  
Lorentz Invariance ◽  
Lorentz Violation ◽  
General Rule ◽  
Torsion Angles ◽  
The Past ◽  
Electro Magnetic Field ◽  
Log Periodic Antenna ◽  
Electro Magnetic ◽  
Local Lorentz Invariance

Abstract A torsional-antenna and a log-periodic antenna are used as a source and an analyzer, respectively, to investigate the possible anomalies of an electro-magnetic field. An unexpected isotropic signal has been detected using those torsion angles, which correspond to a breakdown of the Local Lorentz Invariance, which was found in the past. This coincidence is interpreted as the recovery of a lost symmetry by torqueing the antenna, thus putting in evidence that this Lorentz violation is of angular nature. Introducing a new physical dimension—not only a mathematical dimension as a way to rearrange some equations—is here proposed as a general rule to recover the lost symmetry.

scholarly journals Magnetic field induced transition rates in Ne- and Be-like ions for plasma diagnostics and E1M1 two-photon decay rate determination

2014 ◽  
Vol 488 (15) ◽  
pp. 152005 ◽  
Author(s):  
Jon Grumer ◽  
Jiguang Li ◽  
Wenxian Li ◽  
Martin Andersson ◽  
Tomas Brage ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Decay Rate ◽  
Plasma Diagnostics ◽  
Transition Rates ◽  
Two Photon ◽  
Photon Decay

TORSION BOUNDS FROM CP VIOLATION α2-DYNAMO IN AXION–PHOTON COSMIC PLASMA

2011 ◽  
Vol 26 (38) ◽  
pp. 2863-2868 ◽  
Author(s):  
L. C. GARCIA DE ANDRADE
Keyword(s):  
Magnetic Field ◽  
Cp Violation ◽  
Maxwell Equations ◽  
Lorentz Violation ◽  
Classical Level ◽  
K Meson ◽  
Field Amplification ◽  
Frequency Peak ◽  
Galactic Dynamos ◽  
The Magnetic Field

Years ago Mohanty and Sarkar [Phys. Lett. B433, 424 (1998)] have placed bounds on torsion mass from K meson physics. In this paper, associating torsion to axions a la Campanelli et al. [Phys. Rev. D72, 123001 (2005)], it is shown that it is possible to place limits on spacetime torsion by considering an efficient α2-dynamo CP violation term. Therefore instead of Kostelecky et al. [Phys. Rev. Lett.100, 111102 (2008)] torsion bounds from Lorentz violation, here torsion bounds are obtained from CP violation through dynamo magnetic field amplification. It is also shown that oscillating photon–axion frequency peak is reduced to 10-7 Hz due to torsion mass (or Planck mass when torsion does not propagate) contribution to the photon–axion–torsion action. Though torsion does not couple to electromagnetic fields at classical level, it does at the quantum level. Recently, Garcia de Andrade [Phys. Lett. B468, 28 (2011)] has shown that the photon sector of Lorentz violation (LV) Lagrangian leads to linear nonstandard Maxwell equations where the magnetic field decays slower giving rise to a seed for galactic dynamos. Torsion constraints of the order of K0≈10-42 GeV can be obtained which are more stringent than the value obtained by Kostelecky et al. A lower bound for the existence of galactic dynamos is obtained for torsion as K0≈10-37 GeV .

Photon decay into neutrinos in a strong magnetic field

1976 ◽  
Vol 14 (12) ◽  
pp. 3326-3334 ◽  
Author(s):  
Lester L. DeRaad ◽  
Kimball A. Milton ◽  
N. D. Hari Dass
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Photon Decay

scholarly journals Nonorthogonality andκ-Dependence Eccentricity of Polarized Electromagnetic Waves in CPT-Even Lorentz Violation

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Thiago Prudêncio ◽  
Humberto Belich
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
Electromagnetic Waves ◽  
Maxwell Equations ◽  
Lorentz Violation ◽  
Elliptical Polarization ◽  
Wave Fields ◽  
Lorentz Symmetry Breaking ◽  
Elliptically Polarized ◽  
The Magnetic Field

We discuss the modified Maxwell action of aKF-type Lorentz symmetry breaking theory and present a solution of Maxwell equations derived in the cases of linear and elliptically polarized electromagnetic waves in the vacuum of CPT-even Lorentz violation. We show in this case that the Lorentz violation has the effect of changing the amplitude of one component of the magnetic field, while leaving the electric field unchanged, leading to nonorthogonal propagation of electromagnetic fields and dependence of the eccentricity onκ-term. Further, we exhibit numerically the consequences of this effect in the cases of linear and elliptical polarization, in particular, the regimes of nonorthogonality of the electromagnetic wave fields and the eccentricity of the elliptical polarization of the magnetic field with dependence on theκ-term.

scholarly journals Effect of an external magnetic field on the determination of E1M1 two-photon decay rates in Be-like ions

2013 ◽  
Vol 88 (2) ◽  
Author(s):  
Jon Grumer ◽  
Wenxian Li ◽  
Dietrich Bernhardt ◽  
Jiguang Li ◽  
Stefan Schippers ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Decay Rates ◽  
Two Photon ◽  
Photon Decay

scholarly journals Photon decay in ultrahigh-energy air showers: Stringent bound on Lorentz violation

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
Fabian Duenkel ◽  
Marcus Niechciol ◽  
Markus Risse
Keyword(s):  
Lorentz Violation ◽  
Ultrahigh Energy ◽  
Air Showers ◽  
Photon Decay

scholarly journals Photon decay in UHE air showers: a stringent bound on Lorentz violation

2021 ◽  
Author(s):  
Fabian Duenkel ◽  
Marcus Niechciol ◽  
Markus Risse
Keyword(s):  
Lorentz Violation ◽  
Air Showers ◽  
Photon Decay

Magnetic-field strengths from optical polarization data

1967 ◽  
Vol 31 ◽  
pp. 381-383
Author(s):  
J. M. Greenberg
Keyword(s):  
Magnetic Field ◽  
Optical Polarization ◽  
Polarization Data ◽  
Term Model ◽  
Source Of Information ◽  
Field Strengths

Van de Hulst (Paper 64, Table 1) has marked optical polarization as a questionable or marginal source of information concerning magnetic field strengths. Rather than arguing about this–I should rate this method asq+-, or quarrelling about the term ‘model-sensitive results’, I wish to stress the historical point that as recently as two years ago there were still some who questioned that optical polarization was definitely due to magnetically-oriented interstellar particles.

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