Sterile neutrino dark matter via coinciding resonances

被引：30

作者：

Ghiglieri, J. ^{[1
]}

Laine, M. ^{[2
]}

机构：

[1] Univ Nantes, SUBATECH, IMT Atlantique, IN2P3,CNRS, 4 Rue Alfred Kastler,La Chantrerie BP 20722, F-44307 Nantes, France

[2] Univ Bern, AEC, Inst Theoret Phys, Sidlerstr 5, CH-3012 Bern, Switzerland

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2020年 / 07期

基金：

瑞士国家科学基金会;

关键词：

dark matter theory; particle physics - cosmology connection; leptogenesis; neutrino theory;

D O I：

10.1088/1475-7516/2020/07/012

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It has been proposed that two resonances could coincide in the early universe at temperatures T similar to 0.2 ... 0.5 GeV: one between two nearly degenerate GeV-scale sterile neutrinos, producing a large lepton asymmetry through freeze-out and decays; another between medium-modified active neutrinos and keV-scale sterile neutrinos, converting the lepton asymmetry into dark matter. Making use of a framework which tracks three sterile neutrinos of both helicities as well as three separate lepton asymmetries, and scanning the parameter space of the GeV-scale species, we establish the degree of fine-tuning that is needed for realizing this scenario.

引用

页数：12

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