Searches for Lorentz Invariance Violation at the Pierre Auger Observatory

被引：0

作者：

Trimarelli, Caterina ^{[1
,2
]}

机构：

[1] Univ Aquila, Laquila, Italy

[2] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Laquila, Italy

[3] Observ Pierre Auger, Ave San Martin Norte 304, RA-5613 Malargue, Argentina

来源：

ULTRA HIGH ENERGY COSMIC RAYS, UHECR 2022 | 2023年 / 283卷

关键词：

SPECTRUM;

D O I：

10.1051/epjconf/202328305003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Lorentz Invariance (LI) requires the space-time structure to be the same for all observers, but various quantum gravity theories suggest that it may be violated when approaching the Planck scale. Even a small violation of LI could easily affect the Ultra-High-Energy Cosmic Ray (UHECRs) propagation on a cosmological scale. Moreover, at the extreme energies, like those available in the collisions of UHECRs in the atmosphere, one should also expect a change in the development of Extensive Air-Showers (EAS). In this contribution, Lorentz Invariance Violation (LIV) has been introduced as a perturbation term in the single particle dispersion relation considering a phenomenological approach. As a result, the kinematics of the interactions in both the extragalactic propagation and in the shower development in the atmosphere is affected. The comparison between the model predictions and the data measured by the Pierre Auger Observatory are considered to constrain the LIV scenarios. The impact of LIV has been tested considering the measured energy spectrum and the composition and the resulting upper limits on the photon flux. Finally, the effects on the shower cascade in the atmosphere are studied considering the muon content distribution.

引用

页数：8

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