arXiv 0910.49362009-10-26hep-ph

弯曲和平坦额外维中暗物质候选者的湮灭截面和相互作用耦合

Annihilation cross sections and interaction couplings of the dark matter candidates in the warped and flat extra dimensions

E. O. Iltan

备注：: 14 pages, 5 figures
发表信息：: Mod.Phys.Lett.A25:1187-1197,2010
DOI：: 10.1142/S0217732310032421

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摘要：

我们考虑一个额外的标量标准模型单线态$ϕ_S$的情况下，生活在一个单一的额外维度的RS 1背景。定域在额外维度的标量的零模是暗物质的候选者，并且湮灭截面对它的定域参数非常敏感。作为第二种情况，我们假设标准模型希格斯场可以到达第五维。首先，我们把附加标准模型单重标量场看作是第六额外维的可达场，它的零模是一个可能的暗物质候选者。第二，我们认为新的标准模型单线态，暗物质的候选者，生活在四维空间。在这两种选择中，当紧致化半径$R$较大时，标准模型Higgs场的KK模起着可观测的作用，有效耦合λ S在远离（接近）共振湮灭的10^{-2}-10 ^{-1}（10^{-6}）量级。

英文摘要：

We consider a scenario with an additional scalar standard model singlet $ϕ_S$, living in a single extra dimension of the RS1 background. The zero mode of this scalar which is localized in the extra dimension is a dark matter candidate and the annihilation cross section is strongly sensitive to its localization parameter. As a second scenario, we assume that the standard model Higgs field is accessible to the fifth flat extra dimension. At first we take the additional standard model singlet scalar field as accessible to the sixth extra dimension and its zero mode is a possible dark matter candidate. Second, we consider that the new standard model singlet, the dark matter candidate, lives in four dimensions. In both choices the KK modes of the standard model Higgs field play an observable role for the large values of the compactification radius $R$ and the effective coupling λ_{S} is of the order of 10^{-2}-10^{-1} (10^{-6}) far from (near to) the resonant annihilation.

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