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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Limits on the Lorentz Invariance Violation from UHECR Astrophysics

Full text
Author(s):
Lang, Rodrigo Guedes [1] ; Martinez-Huerta, Humberto [1, 2] ; de Souza, Vitor [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Fis Sao Carlos, Ave Trabalhador Sao Carlense 400, Sao Carlos, SP - Brazil
[2] IPN, Dept Fis, Ctr Invest & Estudios Avanzados, Apartado Postal 14-740, Mexico City 07000, DF - Mexico
Total Affiliations: 2
Document type: Journal article
Source: ASTROPHYSICAL JOURNAL; v. 853, n. 1 JAN 20 2018.
Web of Science Citations: 3
Abstract

In this paper, the Lorentz invariance violation (LIV) is introduced in the calculations of photon propagation in the universe. LIV is considered in the photon sector, and the mean-free path of the gamma gamma -> e(+)e(-) interaction is calculated. The corresponding photon horizon, including LIV effects, is used to predict major changes in the propagation of photons with energy above 10(18) eV. The flux of GZK photons on Earth, considering LIV, is calculated for several source models of ultra-high-energy cosmic rays (UHECRs). The predicted flux of GZK gamma-rays is compared to the new upper limits on the photon flux obtained by the Pierre Auger Observatory in order to impose upper limits on the LIV coefficients of order n = 0, 1, and 2. The limits on the LIV coefficients derived here are more realistic than previous works and in some cases more restrictive. The analysis resulted in LIV upper limits in the photon sector of delta(limit)(gamma,0) similar to -10(-20) , delta(limit)(gamma,1) similar to -10(-38) eV(-1), and delta(limit)(gamma,2) similar to -10(-56) eV(-2) in the astrophysical scenario, which best describes UHECR data. (AU)

FAPESP's process: 17/03680-3 - Lorentz invariance breaking test with astroparticles
Grantee:Humberto Martínez Huerta
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 15/15897-1 - Cherenkov Telescope Array - CTA
Grantee:Luiz Vitor de Souza Filho
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/24943-0 - New physics in astroparticle physics: dark matter and Lorentz invariance
Grantee:Rodrigo Guedes Lang
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 14/26816-0 - Lorentz invariance tests using astroparticle physics data
Grantee:Rodrigo Guedes Lang
Support Opportunities: Scholarships in Brazil - Master