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Testing Lorentz invariance and CPT symmetry using gamma-ray burst neutrinos
Ist Teil von
Physical review. D, 2019-02, Vol.99 (4)
Ort / Verlag
College Park: American Physical Society
Erscheinungsjahr
2019
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A recent work [Y. Huang and B.-Q. Ma, Commun. Phys. 1, 62 (2018)] associated all four PeV neutrinos observed by IceCube to gamma-ray bursts, and revealed a regularity which indicates a Lorentz-violation scale ELV=(6.5±0.4)×1017 GeV with opposite sign factors s=±1 between neutrinos and antineutrinos. The association of “time delay” and “time advance” events with neutrinos and antineutrinos (or vice versa) is only a hypothesis since the IceCube detector cannot tell the chirality of the neutrinos, and further experimental tests are needed to verify this hypothesis. We derive the values of the CPT-odd Lorentz violating parameters in the standard-model extension (SME) framework, and perform a threshold analysis on the electron-positron pair emission of the superluminal neutrinos (or antineutrinos). We find that different neutrino/antineutrino propagation properties, suggested by Y. Huang and B.-Q. Ma, can be described in the SME framework with both Lorentz invariance and CPT symmetry violation, but with a threshold energy constraint. A viable way on testing the CPT symmetry violation between neutrinos and antineutrinos is suggested.