Big-bang nucleosynthesis with unstable gravitino and upper bound on the reheating temperature

Journal Article · Thu Jun 15 04:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.73.123511· OSTI ID:20774863

Kohri, Kazunori ^[1]; Moroi, Takeo; Yotsuyanagi, Akira ^[2]

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1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street Cambridge, Massachusetts 02138 (United States)
2. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)

We study the effects of unstable gravitino on big-bang nucleosynthesis. If the gravitino mass is smaller than {approx}10 TeV, primordial gravitinos produced after inflation are likely to decay after big-bang nucleosynthesis starts, and light-element abundances may be significantly affected by hadro and photodissociation processes as well as by p{r_reversible}n conversion process. We calculate the light-element abundances and derive upper bounds on the reheating temperature after inflation. In our analysis, we calculate decay parameters of the gravitino (i.e. lifetime and branching ratios) in detail. In addition, we perform 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 model dependence of the upper bound on the reheating temperature.

• OSTI ID: 20774863
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 12 Vol. 73; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
COSMOLOGY
ELEMENT ABUNDANCE
ENERGY SPECTRA
HADRONS
LIFETIME
NUCLEOSYNTHESIS
PARTICLE DECAY
REST MASS
SPARTICLES
TEV RANGE