暗物质是贝尔II星B→Kνν¯过剩的起源吗？

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-10-10 DOI:10.1103/r2gw-rwzw

Lorenzo Calibbi, Tong Li, Lopamudra Mukherjee, Michael A. Schmidt

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引用次数: 0

摘要

我们提出了两个暗物质（DM）模型，它们可以为B+→K+νν¯的标准模型（SM）预测提供B+→K+νν¯过剩的自然解释，这已经由Belle II合作报告。在一种情况下，暗区和可见光区之间的相互作用是由类轴子粒子介导的，在第二种情况下，是由暗光子和SM光子之间的动力学混合介导的。这两种模型都包含一个光费米子单重态作为DM候选，并可以分别通过冻结和冻结产生机制来解释观测到的DM遗迹丰度，同时解释Belle II过剩。

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Is dark matter the origin of the B→Kνν¯ excess at Belle II?

We present two models of dark matter (DM) that can provide a natural explanation of the excess of B+→K++invisible events with respect to the Standard Model (SM) prediction for B+→K+νν¯, which has been reported by the Belle II Collaboration. Interactions between the dark and the visible sector are mediated by an axionlike particle in one case, by the kinetic mixing between a dark photon and the SM photon in the second case. Both models encompass a light fermion singlet as the DM candidate and can account for the observed DM relic abundance through, respectively, the freeze-in and the freeze-out production mechanism, while simultaneously explaining the Belle II excess.

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来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.