Strict limit on CPT violation from polarization of γ-ray bursts.
Phys Rev Lett
; 109(24): 241104, 2012 Dec 14.
Article
em En
| MEDLINE
| ID: mdl-23368301
ABSTRACT
We report the strictest observational verification of CPT invariance in the photon sector, as a result of γ-ray polarization measurement of distant gamma-ray bursts (GRBs), which are the brightest stellar-sized explosions in the Universe. We detected γ-ray polarization of three GRBs with high significance levels, and the source distances may be constrained by a well-known luminosity indicator for GRBs. For the Lorentz- and CPT-violating dispersion relation E(±)(2) = p(2) ± 2ξp(3)/M(Pl), where ± denotes different circular polarization states of the photon, the parameter ξ is constrained as |ξ|
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2012
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Article