Limits on the Lorentz Invariance Violation from UHECR Astrophysics

Autor(es)

Lang, Rodrigo Guedes ^[1] ; Martinez-Huerta, Humberto ^{[1, 2]} ; de Souza, Vitor ^[1]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: ASTROPHYSICAL JOURNAL; v. 853, n. 1 JAN 20 2018.
• Citações Web of Science: 3

Resumo

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)

• Processo FAPESP: 17/03680-3 - Teste de quebra da invariância de Lorentz com astropartículas
• Beneficiário: Humberto Martínez Huerta
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/15897-1 - Cherenkov Telescope Array - CTA
• Beneficiário: Luiz Vitor de Souza Filho
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/24943-0 - Nova física fundamental em astropartículas: matéria escura e Invariância de Lorentz
• Beneficiário: Rodrigo Guedes Lang
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/26816-0 - Invariância de Lorentz no contexto de astrofísica de partículas
• Beneficiário: Rodrigo Guedes Lang
• Modalidade de apoio: Bolsas no Brasil - Mestrado