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arXiv 0905.1333hep-phastro-ph.HE
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太阳中非弹性暗物质的捕获

Capture of Inelastic Dark Matter in the Sun

Shmuel Nussinov, Lian-Tao Wang, Itay Yavin

摘要:

我们认为捕获的暗物质在太阳的非弹性散射对核的非弹性暗物质的情况。我们证明,假设WIMP-核子截面为σ_n = 10^{-40} \cm^2,所得到的俘获率和密度足够高,以致于来自太阳的μ子中微子通量的电流边界排除了WIMP到W^+W^-,Z^0 Z^0,τ^+τ^-,t \bar{t}和中微子的任何可观的湮灭分支比。对于b \bar{b}和c \bar{c}的零化,也有稍弱的边界。湮灭成较轻的粒子,可能产生中微子,如μ^+μ^-,π介子和K介子是不受约束的,因为它们在衰变前会在太阳中停止。有趣的是,这与最近一些由PAMELA结果激发的提议是一致的,这些提议认为WIMP湮灭为轻玻色子,随后主要衰变为轻轻子和π介子。

英文摘要:

We consider the capture of dark matter in the Sun by inelastic scattering against nuclei as in the inelastic dark matter scenario. We show that, assuming a WIMP-nucleon cross-section of σ_n = 10^{-40}\cm^2 the resulting capture rate and density are sufficiently high so that current bounds on the muon neutrino flux from the Sun rule out any appreciable annihilation branching ratio of WIMPs into W^+W^-, Z^0Z^0, τ^+τ^-, t\bar{t} and neutrinos. Slightly weaker bounds are also available for annihilations into b\bar{b} and c\bar{c}. Annihilations into lighter particles that may produce neutrinos, such as μ^+μ^-, pions and kaons are unconstrained since those stop in the Sun before decaying. Interestingly enough, this is consistent with some recent proposals motivated by the PAMELA results for the annihilation of WIMPs into light bosons which subsequently decay predominantly into light leptons and pions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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