Effects of Squark Processes on the Axino CDM Abundance | Zendy

Laura Covi | Zendy; Leszek Roszkowski | Zendy; Michael Small | Zendy

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Effects of Squark Processes on the Axino CDM Abundance

Author(s) -

Laura Covi,

Leszek Roszkowski,

Michael Small

Publication year - 2002

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2002/07/023

Subject(s) - particle physics , physics , gluino , quark , cold dark matter , coupling (piping) , universe , dark matter , supersymmetry , nuclear physics , astrophysics , mechanical engineering , engineering

We investigate the role of an effective dimension-4 axino-quark-squarkcoupling in the thermal processes producing stable cold axino relics in theearly Universe. We find that, while the induced squark and quark scatteringprocesses are always negligible, squark decays become important in the case oflow reheat temperature and large gluino mass. The effect can tighten the boundson the scenario from the requirement that cold dark matter axinos do notoverclose the Universe.Comment: 20 pages, 9 figures, uses JHEP3.cl

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