arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2011.04679hep-phastro-ph.COastro-ph.GA
收藏

暗物质自相互作用的半经典机制

The Semi-Classical Regime for Dark Matter Self-Interactions

Brian Colquhoun, Saniya Heeba, Felix Kahlhoefer, Laura Sagunski, Sean Tulin

摘要:

许多暗物质自相互作用的粒子物理模型--旨在解决无碰撞冷暗物质范式长期存在的挑战--都属于半经典体系,相互作用势与暗物质粒子的德布罗意波长相比是长程的。在这项工作中,我们提出了一个量子力学推导和新的半经典的动量转移和粘性截面的自相互作用的Yukawa势介导的解析公式。我们的结果包括领先的量子校正超过经典极限,并允许可区分和相同的暗物质粒子。我们的公式取代了著名的动量转移截面公式,从经典的散射问题,这是经常使用的自相互作用暗物质的唯象研究。再加上以前的近似公式的截面的量子制度,我们的新结果允许几乎完整的分析覆盖的参数空间与汤川势的自相互作用。我们还讨论了我们的研究结果的现象学意义,并提供了一个新的速度平均程序约束速度依赖的自相互作用。我们的结果已在新发布的代码CLASSICS中实现。

英文摘要:

Many particle physics models for dark matter self-interactions - motivated to address long-standing challenges to the collisionless cold dark matter paradigm - fall within the semi-classical regime, with interaction potentials that are long-range compared to the de Broglie wavelength for dark matter particles. In this work, we present a quantum mechanical derivation and new analytic formulas for the semi-classical momentum transfer and viscosity cross sections for self-interactions mediated by a Yukawa potential. Our results include the leading quantum corrections beyond the classical limit and allow for both distinguishable and identical dark matter particles. Our formulas supersede the well-known formulas for the momentum transfer cross section obtained from the classical scattering problem, which are often used in phenomenological studies of self-interacting dark matter. Together with previous approximation formulas for the cross section in the quantum regime, our new results allow for nearly complete analytic coverage of the parameter space for self-interactions with a Yukawa potential. We also discuss the phenomenological implications of our results and provide a new velocity-averaging procedure for constraining velocity-dependent self-interactions. Our results have been implemented in the newly released code CLASSICS.

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。

↑