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arXiv 1003.0437hep-ph
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MSSM中低质量中性伴子暗物质与$B_s\to μ^+μ^-$和Higgs搜索极限的约束

Low Mass Neutralino Dark Matter in the MSSM with Constraints from $B_s\to μ^+μ^-$ and Higgs Search Limits

Daniel Feldman, Zuowei Liu, Pran Nath

摘要:

由于在暗物质探测器中可能存在超出本底的过量事件,质量低至(5-10)GeV的低中性伴子区域最近引起了人们的注意。本文给出了包含这个低质量区的自旋无关中性子质子截面$\SI$的分析。分析是在MSSM与辐射电弱对称性破缺(REWSB)。研究发现,在REWSB框架内,MSSM可以容纳$10^{-40}$ cm $^2$的大截面。然而,包括s粒子质量限制从目前的实验,以及下限的希格斯搜索从Tevatron,和目前的实验上限$B_s\to μ^+μ^-$显着限制允许的参数空间减少$\SI$躺在$\sim 10^{-41}$ cm $^2$或甚至更低的中性伴子质量约10 GeV。这些横截面比解释最近在低中性伴子质量区的暗物质实验中报道的数据所需的横截面低一个数量级。

英文摘要:

The region of low neutralino masses as low as (5-10) GeV has attracted attention recently due to the possibility of excess events above background in dark matter detectors. An analysis of spin independent neutralino-proton cross sections $\SI$ which includes this low mass region is given. The analysis is done in MSSM with radiative electroweak symmetry breaking (REWSB). It is found that cross sections as large as $10^{-40}$ cm$^2$ can be accommodated in MSSM within the REWSB framework. However, inclusion of sparticle mass limits from current experiments, as well as lower limits on the Higgs searches from the Tevatron, and the current experimental upper limit on $B_s\to μ^+μ^-$ significantly limit the allowed parameter space reducing $\SI$ to lie below $\sim 10^{-41}$cm$^2$ or even lower for neutralino masses around 10 GeV. These cross sections are an order of magnitude lower than the cross sections needed to explain the reported data in the recent dark matter experiments in the low neutralino mass region.

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