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arXiv 2108.02525hep-phastro-ph.COastro-ph.HE
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中子星中暗物质俘获的改进处理 III:核子与奇异靶

Improved Treatment of Dark Matter Capture in Neutron Stars III: Nucleon and Exotic Targets

Filippo Anzuini, Nicole F. Bell, Giorgio Busoni, Theo F. Motta, Sandra Robles, Anthony W. Thomas, Michael Virgato

AI总结:

本文研究了暗物质在中子星强子靶上的俘获,通过引入动量相关形状因子和重子强相互作用效应,发现这些改进抑制了俘获率并降低了物态方程的影响,同时指出中子星探测在很宽质量范围内比核反冲实验具有更高的灵敏度。

摘要:

我们考虑了暗物质(DM)通过在强子靶(包括中子、质子和超子)上散射而在中子星中的俘获过程。我们扩展了先前的分析,引入了动量相关形状因子以解释强子结构,并考虑了致密中子星内部重子强相互作用的影响,而不是将重子建模为自由费米气体。这些效应的结合在很宽的质量范围内抑制了暗物质俘获率,从而增加了使俘获率达到几何极限饱和的散射截面。此外,与中子星物态方程选择相关的俘获率变化也有所减小。对于质子靶,使用相互作用重子方法以获得正确的费米能量,对于在泡利阻塞区准确评估俘获率至关重要。对于预期包含奇异物质的重中子星,我们确定了暗物质在超子上散射对总俘获率有显著贡献的情况。尽管与现有分析相比中子星的俘获率较小,但我们发现,在很宽的暗物质质量范围内,预计的暗物质-核子散射灵敏度大大超过了核反冲实验的灵敏度。

英文摘要:

We consider the capture of dark matter (DM) in neutron stars via scattering on hadronic targets, including neutrons, protons and hyperons. We extend previous analyses by including momentum dependent form factors, which account for hadronic structure, and incorporating the effect of baryon strong interactions in the dense neutron star interior, rather than modelling the baryons as a free Fermi gas. The combination of these effects suppresses the DM capture rate over a wide mass range, thus increasing the cross section for which the capture rate saturates the geometric limit. In addition, variation in the capture rate associated with the choice of neutron star equation of state is reduced. For proton targets, the use of the interacting baryon approach to obtain the correct Fermi energy is essential for an accurate evaluation of the capture rate in the Pauli-blocked regime. For heavy neutron stars, which are expected to contain exotic matter, we identify cases where DM scattering on hyperons contributes significantly to the total capture rate. Despite smaller neutron star capture rates, compared to existing analyses, we find that the projected DM-nucleon scattering sensitivity greatly exceeds that of nuclear recoil experiments for a wide DM mass range.

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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