Pith. sign in

REVIEW 2 cited by

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

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 1208.5288 v2 pith:IANTE5DG submitted 2012-08-27 astro-ph.HE gr-qchep-phhep-th

Kenji Toma , Shinji Mukohyama , Daisuke Yonetoku , Toshio Murakami , Shuichi Gunji , Tatehiro Mihara , Yoshiyuki Morihara , Tomonori Sakashita
show 4 more authors
Takuya Takahashi Yudai Wakashima Hajime Yonemochi Noriyuki Toukairin
This is my paper · ORCID
classification astro-ph.HEgr-qchep-phhep-th
keywords gamma-raypolarizationgrbsburstsconstrainedcpt-violatingeffectsgravity
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

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 brightest stellar-size explosions in the universe. We detected the gamma-ray polarization of three GRBs with high significance, and the source distances may be constrained by a well-known luminosity indicator for GRBs. For the Lorentz- and CPT-violating dispersion relation E_{\pm}^2=p^2 \pm 2\xi p^3/M_{Pl}, where \pm denotes different circular polarization states of the photon, the parameter \xi is constrained as |\xi|<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.

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Anisotropic quantum universe in Ho\v{r}ava-Lifshitz gravity

    gr-qc 2025-05 conditional novelty 6.0 of 10

    In the small-universe limit of Horava-Lifshitz gravity, the Wheeler-DeWitt equation separates and the anisotropy wave functions become normalizable harmonic-oscillator states, predicting small initial anisotropies set...

  2. A winding number analysis of Schwarzschild black hole stability in light of Planck-scale modified kinematics

    gr-qc 2026-07 conditional novelty 5.0 of 10

    For the cubic entropy correction S=πr_h²−αr_h³ arising from a Planck-scale modified dispersion relation, all physically allowed Schwarzschild-like branches have winding number w=−1, so no stable phase appears.

Pith tools