Reevaluation of the cosmic antideuteron flux from cosmic-ray interactions and from exotic sources
Reevaluation of the cosmic antideuteron flux from cosmic-ray interactions and from exotic sources
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DOI：
10.1103/physrevd.105.083021
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发表时间：
2022-01
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通讯作者：
L. vSerkvsnyt.e;S. Konigstorfer;P. Doetinchem;L. Fabbietti;D. Gómez-Coral;Johannes Herms;A. Ibarra;T. Poschl;A. Shukla;A. Strong;I. Vorobyev
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作者：
L. vSerkvsnyt.e;S. Konigstorfer;P. Doetinchem;L. Fabbietti;D. Gómez-Coral;Johannes Herms;A. Ibarra;T. Poschl;A. Shukla;A. Strong;I. Vorobyev
宇宙射线反氘核可能是发现银河系奇异现象的关键，例如暗物质湮灭或原始黑洞蒸发。不幸的是，对地球上反氘核通量的理论预测受到来自银河系中反氘核产生和传播机制的不确定性的困扰。我们提出了来自宇宙射线与星际介质碰撞和奇异过程的反氘核通量的最新计算。我们包括第一次的反氘核非弹性相互作用截面最近测量的ALICE合作占传播过程中的反氘核的损失。为了括号中的预期通量的不确定性，我们考虑几个国家的最先进的模型的反氘生产和宇宙射线传播。
Cosmic-ray antideuterons could be a key for the discovery of exotic phenomena in our Galaxy, such as dark-matter annihilations or primordial black hole evaporation. Unfortunately the theoretical predictions of the antideuteron flux at Earth are plagued with uncertainties from the mechanism of antideuteron production and propagation in the Galaxy. We present the most up-to-date calculation of the antideuteron fluxes from cosmic-ray collisions with the interstellar medium and from exotic processes. We include for the first time the antideuteron inelastic interaction cross section recently measured by the ALICE collaboration to account for the loss of antideuterons during propagation. In order to bracket the uncertainty in the expected fluxes, we consider several state-of-the-art models of antideuteron production and of cosmic-ray propagation.