Insights from binary pulsars and laboratories into baryon number violation: Implications for GeV dark matter

被引：0

作者：

Allahverdi, Rouzbeh ^{[1
]}

Thompson, Adrian ^{[2
]}

Zakeri, Mohammadreza ^{[3
,4
]}

机构：

[1] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87106 USA

[2] Northwestern Univ, Evanston, IL 60208 USA

[3] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[4] Eastern Kentucky Univ, Dept Phys Geosci & Astron, Richmond, KY 40475 USA

来源：

PHYSICAL REVIEW D | 2024年 / 110卷 / 11期

基金：

美国国家科学基金会;

关键词：

NEUTRON-STARS;

D O I：

10.1103/PhysRevD.110.115010

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Rare processes in laboratory and within astrophysical environments can be highly sensitive probes of baryon-number-violating interactions at the TeV scale. We demonstrate the power of neutron stars to constrain baryon-number violation by considering a minimal extension of the standard model involving a TeV-mass scalar mediator and a GeV scale Majorana fermion yi . We find that a Delta B = 2 mass-loss process in binary pulsar systems via n-* yyi and the subsequent scattering yin-* pi-K+ places stringent constraints on the model parameter space. These limits will become much stronger, due to the possibility of Lambda-* yyi decays at the tree level, if the neutron star equation of state is hyperonic. We compare these constraints with ongoing and future collider experiments, n - n <overline> oscillations, and dinucleon decay searches at future largescale neutrino experiments, finding that the binary pulsars bounds on couplings are significantly tighter for specific flavor combinations.

引用

页数：18

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