Sterile neutrino Dark Matter production from scalar decay in a thermal bath

被引：39

作者：

Drewes, Marco ^{[1
,5
]}

Kang, Jin U. ^{[2
,3
,4
,5
]}

机构：

[1] Tech Univ Munich, Phys Dept T70, James Franck Str 1, D-85748 Garching, Germany

[2] Nanjing Univ, Dept Phys, 22 Hankou Rd, Nanjing 210093, Jiangsu, Peoples R China

[3] Kim Il Sung Univ, Dept Phys, Taesong Dist, Pyongyang, North Korea

[4] Abdus Salaam Int Ctr Theoret Phys, Str Costiera 11, I-34151 Trieste, Italy

[5] Chinese Acad Sci, Kavli Inst Theoret Phys China, Zhong Guan Cun East St 55,POB 2735, Beijing 100190, Peoples R China

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2016年 / 05期

关键词：

Beyond Standard Model; Cosmology of Theories beyond the SM; Neutrino Physics; Thermal Field Theory; FINITE-TEMPERATURE; BARYON ASYMMETRY; GAUGE-THEORIES; LEPTOGENESIS; MASSES; OSCILLATIONS; ORIGIN; WARM; HOT; DISCONTINUITIES;

D O I：

10.1007/JHEP05(2016)051

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We calculate the production rate of singlet fermions from the decay of neutral or charged scalar fields in a hot plasma. We find that there are considerable thermal corrections when the temperature of the plasma exceeds the mass of the decaying scalar. We give analytic expressions for the temperature-corrected production rates in the regime where the decay products are relativistic. We also study the regime of non-relativistic decay products numerically. Our results can be used to determine the abundance and momentum distribution of Dark Matter particles produced in scalar decays. The inclusion of thermal corrections helps to improve predictions for the free streaming of the Dark Matter particles, which is crucial to test the compatibility of a given model with cosmic structure formation. With some modifications, our results may be generalised to the production of other Dark Matter candidates in scalar decays.

引用

页数：48

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