Stau-catalyzed big-bang nucleosynthesis reactions

Journal Article · Tue Jun 01 04:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3455917· OSTI ID:21362092

Kamimura, Masayasu ^[1]; Kino, Yasushi ^[2]; Hiyama, Emiko ^[3]

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1. Department of Physics, Kyushu University, Fukuoka 812-8581 (Japan)
2. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
3. RIKEN Nishina Center, Wako 351-0198 (Japan)

We study the new type of big-bang nucleosynthesis (BBN) reactions that are catalyzed by a hypothetical long-lived negatively charged, massive leptonic particle (called X{sup -}) such as the supersymmetric (SUSY) particle stau, the scalar partner of the tau lepton. It is known that if the X{sup -} particle has a lifetime of tau{sub X} > or approx. 10{sup 3} s, it can capture a light element previously synthesized in standard BBN and form a Coulombic bound state and induces various types of reactions in which X{sup -} acts as a catalyst. Some of these X{sup -} catalyzed reactions have significantly large cross sections so that the inclusion of the reactions into the BBN network calculation can markedly change the abundances of some elements. We use a high-accuracy three-body calculation method developed by the authors and provide precise cross sections and rates of these catalyzed BBN reactions for use in the BBN network calculation.

• OSTI ID: 21362092
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1238; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOUND STATE
CALCULATION METHODS
CHARGE EXCHANGE
CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY TRANSFER
FERMIONS
HEAT TRANSFER
HEAVY LEPTONS
LEPTONS
LIFETIME
MANY-BODY PROBLEM
NUCLEOSYNTHESIS
POSTULATED PARTICLES
RADIANT HEAT TRANSFER
SPARTICLES
SUPERSYMMETRY
SYMMETRY
SYNTHESIS
TAU PARTICLES
THREE-BODY PROBLEM