Strict Limit on CPT Violation from Polarization of gamma-Ray Bursts

作者：Toma Kenji^*; Mukohyama Shinji; Yonetoku Daisuke; Murakami Toshio; Gunji Shuichi; Mihara Tatehiro; Morihara Yoshiyuki; Sakashita Tomonori; Takahashi Takuya; Wakashima Yudai; Yonemochi Hajime; Toukairin Noriyuki

来源：Physical Review Letters, 2012, 109(24): 241104.

DOI：10.1103/PhysRevLett.109.241104

We report the strictest observational verification of CPT invariance in the photon sector, as a result of gamma-ray polarization measurement of distant gamma-ray bursts (GRBs), which are the brightest stellar-sized explosions in the Universe. We detected gamma-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) +/- 2 xi p(3)/M-Pl, where +/- denotes different circular polarization states of the photon, the parameter xi is constrained as vertical bar xi vertical bar %26lt; O(10(-15)). Barring precise cancellation between quantum gravity effects and dark energy effects, the stringent limit on the CPT-violating effect leads to the expectation that quantum gravity presumably respects the CPT invariance. DOI: 10.1103/PhysRevLett.109.241104

• 出版日期2012-12-13