A complete calculation for direct detection of Wino dark matter
A complete calculation for direct detection of Wino dark matter
复制标题
DOI：
10.1016/j.physletb.2010.05.047
复制
发表时间：
2010-04
影响因子：
4.4
通讯作者：
J. Hisano;Koji Ishiwata;N. Nagata
中科院分区：
文献类型：
--
作者：
J. Hisano;Koji Ishiwata;N. Nagata
在反常介导的超对称性破缺中，SU（2）L多重态的中性Gaugino（Wino）可以成为最轻的超对称性粒子，并成为暗物质的候选者。假设超对称粒子和较重的Higgs玻色子的质量为超对称标准模型中引力子质量的量级，计算了Wino暗物质与核子的散射截面，核子是直接探测暗物质的物质.在这种情况下，温诺-核子耦合是由环过程产生的。我们在计算中考虑了双圈对Wino-胶子相互作用的贡献，因为它是Wino-核子耦合的主要贡献之一。结果发现，与质子的自旋无关散射截面为10−（46-48）cm 2。虽然它几乎与威诺质量无关，但由于意外抵消，结果对希格斯玻色子质量非常敏感。
In the anomaly-mediated supersymmetry (SUSY) breaking scenario, neutral gaugino of SU(2)Lmultiplet, Wino, can be the lightest SUSY particle and become a candidate for dark matter. We calculated scattering cross section of Wino dark matter with nucleon, which is responsible for direct detection of the dark matter, on the assumption that the SUSY particles and the heavier Higgs bosons have masses of the order of the gravitino mass in the SUSY standard model. In such a case, the Wino–nucleon coupling is generated by loop processes. We have included two-loop contribution to Wino–gluon interaction in the calculation, since it is one of the leading contributions to the Wino–nucleon coupling. It was found that the spin-independent scattering cross section with proton is 10−(46–48)cm2. While it is almost independent of the Wino mass, the result is quite sensitive to the Higgs boson mass due to the accidental cancellation.