LHAASO discovery of highest-energy photons towards new physics

Li, Chengyi; Ma, Bo-Qiang

doi:10.1016/j.scib.2021.07.030

Cited by 7 publications

(9 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The arguments are similar to that of refs. [26,27] (see also [73,74]), and will not be repeated here. It is essential to notice that, in that case, an estimate about the photon's QG scale can be got as…”

Section: Jhep03(2023)230mentioning

confidence: 99%

Lorentz and CPT breaking in gamma-ray burst neutrinos from string theory

2023

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

Previous studies on high-energy gamma-ray burst neutrinos from IceCube suggest a neutrino speed variation at the Lorentz violation (LV) scale of ~6.4 × 1017 GeV, with opposite velocity variances between neutrinos and antineutrinos. Within a spacetime foam model, inspired by string theory, we develop an approach to describe the suggested neutrino/antineutrino propagation properties with both Lorentz invariance and CPT symmetry breaking. A threshold analysis on the bremsstrahlung of electron-positron pair (ν → νee+) for the superluminal (anti)neutrino is performed. We find that, due to the energy violation caused by the quantum foam, such reaction may be restricted to occur at sufficient high energies and could even be kinematically forbidden. Constraints on neutrino LV from vacuum ee+ pair emission are naturally avoided. Future experiments are appealed to test further the CPT violation of cosmic neutrinos and/or neutrino superluminality.

show abstract

Section: Jhep03(2023)230mentioning

confidence: 99%

Lorentz and CPT breaking in gamma-ray burst neutrinos from string theory

2023

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this model, gauge bosons, such as photons, have modified dispersion relations. Current observational data from LHAASO can be used to explore the LV properties of photons and provide support for this model [46,47]. In this model, charged particles, such as electrons, have dispersion relations consistent with the predictions of special relativity and are not subject to any (tree-level) quantum gravity modifications, and this property is supported by a new research [51] which uses the latest observations of photons from the Crab Nebula by LHAASO.…”

Section: D-foam Model In String Theorymentioning

confidence: 87%

“…If the LV modifies not only the dispersion relation of photons, but also the dispersion relation of electrons, then the decay of high-energy photons can also occur under the proper combination of modification parameters. At present, the observation data of LHAASO set very strict limitations on the decay of photons [46][47][48][49], and we will discuss that in detail later.…”

Section: • Decay Of High-energy Photonsmentioning

confidence: 99%

See 1 more Smart Citation

Lorentz Symmetry Violation of Cosmic Photons

2022

Universe

Self Cite

View full text Add to dashboard Cite

As a basic symmetry of space-time, Lorentz symmetry has played important roles in various fields of physics, and it is a glamorous question whether Lorentz symmetry breaks. Since Einstein proposed special relativity, Lorentz symmetry has withstood very strict tests, but there are still motivations for Lorentz symmetry violation (LV) research from both theoretical consideration and experimental feasibility, that attract physicists to work on LV theories, phenomena and experimental tests with enthusiasm. There are many theoretical models including LV effects, and different theoretical models predict different LV phenomena, from which we can verify or constrain LV effects. Here, we introduce three types of LV theories: quantum gravity theory, space-time structure theory and effective field theory with extra-terms. Limited by the energy of particles, the experimental tests of LV are very difficult; however, due to the high energy and long propagation distance, high-energy particles from astronomical sources can be used for LV phenomenological researches. Especially with cosmic photons, various astronomical observations provide rich data from which one can obtain various constraints for LV researches. Here, we review four common astronomical phenomena which are ideal for LV studies, together with current constraints on LV effects of photons.

show abstract

“…For a more extensive and up-to-date discussion on this argument, we refer the reader to Refs. [4,21], see also [36,39].…”

mentioning

confidence: 98%