Research output: Contribution to journal › Article › peer-review
Patterns of Lorentz symmetry breaking in QED by CPT-odd interaction. / Andrianov, A. A.; Soldati, R.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 435, No. 3-4, 10.09.1998, p. 449-452.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Patterns of Lorentz symmetry breaking in QED by CPT-odd interaction
AU - Andrianov, A. A.
AU - Soldati, R.
PY - 1998/9/10
Y1 - 1998/9/10
N2 - A tiny Lorentz symmetry breaking can be mediated in Electrodynamics by means of the Chern-Simons (CS) interaction polarized along a constant CS vector. Its presence makes the vacuum optically active that has been recently estimated from astrophysical data. We examine two possibilities for the CS vector to be time-like or space-like, under the assumption that it originates from v.e.v. of some pseudoscalar matter. It is shown that: a) a time-like CS vector makes the vacuum unstable under pairs creation of tachyonic photon modes with the finite vacuum decay rate, i.e. it is unlikely realized at macroscopic time scales; b) on the contrary, the space-like CS vector does not yield any tachyonic modes and, moreover, if its dynamical counterpart is substantially described by a scale invariant interaction, then the QED radiation effects induce the dynamical breaking of Lorentz symmetry, i.e. the occurrence of space-like CS vector appears to be rather natural.
AB - A tiny Lorentz symmetry breaking can be mediated in Electrodynamics by means of the Chern-Simons (CS) interaction polarized along a constant CS vector. Its presence makes the vacuum optically active that has been recently estimated from astrophysical data. We examine two possibilities for the CS vector to be time-like or space-like, under the assumption that it originates from v.e.v. of some pseudoscalar matter. It is shown that: a) a time-like CS vector makes the vacuum unstable under pairs creation of tachyonic photon modes with the finite vacuum decay rate, i.e. it is unlikely realized at macroscopic time scales; b) on the contrary, the space-like CS vector does not yield any tachyonic modes and, moreover, if its dynamical counterpart is substantially described by a scale invariant interaction, then the QED radiation effects induce the dynamical breaking of Lorentz symmetry, i.e. the occurrence of space-like CS vector appears to be rather natural.
UR - http://www.scopus.com/inward/record.url?scp=0346943100&partnerID=8YFLogxK
U2 - 10.1016/S0370-2693(98)00823-5
DO - 10.1016/S0370-2693(98)00823-5
M3 - Article
AN - SCOPUS:0346943100
VL - 435
SP - 449
EP - 452
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 3-4
ER -
ID: 41550447