Constraints on dark matter annihilation cross section in the brane-world and quintessence scenarios

Journal Article · Mon Jun 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.115023· OSTI ID:21300895

Wanlei, Guo ^[1]; Xin, Zhang ^[2]

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1. Kavli Institute for Theoretical Physics China, Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Science, Beijing 100190 (China)
2. Department of Physics, College of Sciences, Northeastern University, Shenyang 110004 (China)

We investigate the dark matter annihilation in the brane-world and quintessence scenarios, in which the modified cosmological expansion rate can enhance the thermal relic density of dark matter. According to the observed dark matter abundance, we constrain the thermally averaged annihilation cross section <{sigma}v> in these two scenarios. In addition, the big bang nucleosynthesis and the partial-wave unitarity are also used to place bounds on <{sigma}v>. It is found that both scenarios can lead to a large annihilation cross section, so they can be used to explain the recent PAMELA, ATIC, and PPB-BETS anomalies.

• OSTI ID: 21300895
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
CROSS SECTIONS
DENSITY
EXPANSION
NONLUMINOUS MATTER
NUCLEOSYNTHESIS
PARTIAL WAVES
UNITARITY