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High Energy Physics - Phenomenology

arXiv:hep-ph/0507245 (hep-ph)
[Submitted on 20 Jul 2005]

Title:Big-Bang Nucleosynthesis with Unstable Gravitino and Upper Bound on the Reheating Temperature

Authors:Kazunori Kohri, Takeo Moroi, Akira Yotsuyanagi
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Abstract: We study the effects of the unstable gravitino on the big-bang nucleosynthesis. If the gravitino mass is smaller than \sim 10 TeV, primordial gravitinos produced after the inflation are likely to decay after the big-bang nucleosynthesis starts, and the light element abundances may be significantly affected by the hadro- and photo-dissociation processes as well as by the p n conversion process. We calculate the light element abundances and derived upper bound on the reheating temperature after the inflation. In our analysis, we calculate the decay parameters of the gravitino (i.e., lifetime and branching ratios) in detail. In addition, we performed a systematic study of the hadron spectrum produced by the gravitino decay, taking account of all the hadrons produced by the decay products of the gravitino (including the daughter superparticles). We discuss the model-dependence of the upper bound on the reheating temperature.
Comments: 32 pages, 11 figures
Subjects: High Energy Physics - Phenomenology (hep-ph); Astrophysics (astro-ph)
Report number: OU-TAP-261, TU-749
Cite as: arXiv:hep-ph/0507245
  (or arXiv:hep-ph/0507245v1 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/0507245
Journal reference: Phys.Rev.D73:123511,2006
Related DOI: https://doi.org/10.1103/PhysRevD.73.123511

Submission history

From: Akira Yotsuyanagi [view email]
[v1] Wed, 20 Jul 2005 17:03:34 UTC (456 KB)
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