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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Gamma-ray lines may reveal the CP nature of the dark matter particle

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Autor(es):
Queiroz, Farinaldo S. [1] ; Yaguna, Carlos E. [2]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Fed Rio Grande do Norte, Int Inst Phys, Campus Univ, BR-59078970 Natal, RN - Brazil
[2] UPTC, Escuela Fis, Ave Cent Norte, Tunja - Colombia
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Journal of Cosmology and Astroparticle Physics; n. 1 JAN 2019.
Citações Web of Science: 0
Resumo

Determining the fundamental properties of the dark matter is one of the most important open problems in particle physics today. If the dark matter particle has spin zero, one of these properties is its CP nature. That is, whether it is CP-even (scalar), CP-odd (pseudoscalar), or if its interactions violate CP. In this paper, we show that the observation of gamma-ray lines arising from the decay of a spin-zero dark matter particle could be used to discriminate among these possibilities. We consider a general setup where dark matter decay is induced by effective operators and demonstrate that, due to gauge invariance, there exists correlations among the branching ratios into gauge boson final states (gamma gamma, gamma Z, W+W-, ZZ) that depend on the mass and the CP properties of the dark matter. Consequently, the future observation of gamma-ray lines may in principle be used to establish the CP nature of the dark matter particle. (AU)

Processo FAPESP: 16/01343-7 - ICTP Instituto Sul-Americano para Física Fundamental: um centro regional para física teórica
Beneficiário:Nathan Jacob Berkovits
Linha de fomento: Auxílio à Pesquisa - Temático