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Non-Abelian vector boson as FIMP dark matter

文献类型:期刊论文

作者Barman, Basabendu; Bhattacharya, Subhaditya; Zakeri, Mohammadreza1
刊名JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期2020
期号2页码:29
ISSN号1475-7516
DOI10.1088/1475-7516/2020/02/029
英文摘要In this analysis we demonstrate the freeze-in realization of a non-abelian vector boson dark matter (DM). We choose to elaborate an existing SU(2)(N) extension (N stands for neutral) of the Standard Model (SM) with an additional U(1) = S' global symmetry, which stabilizes the vector boson (X, (X) over bar) as DM through unbroken S = T3N + S' as the lightest odd S particle. Apart from showing the right order of the SU(2)(N) coupling (similar to 10(-12)-10(-13)) required for the correct relic of DM via freeze in, the analysis reveals that the contribution to the freeze-in production of DM from the decay of a heavier scalar bi-doublet zeta(0,+/-)(1) -> zeta(0,+/-)(2) X is equally important even after the decoupling of zeta(0,+/-)(1) from the thermal bath. This treatment of computing the relic abundance in context with freeze-in is practically model-independent and can be applied to all the scenarios where the DM is produced from the decay of a massive particle which was once in equilibrium with the thermal bath. This bi-doublet earlier was in equilibrium with the visible sector due to SM SU(2)(L) coupling. Moreover, the neutral component of SU(2)(N) scalar triplet (Delta), responsible for neutrino mass generation in this framework, turns out to serve as additional DMs in the model and offers a multipartite freeze-in DM set up to explore. The allowed parameter space is obtained after estimating constraints from CMB, BBN and AMS-02 bound. This exercise nicely complements the freeze-out realization of (X, (X) over bar) as weakly interacting massive particle (WIMP) and distinguishes it through stable charge track signature at collider compared to leptonic signal excess as in WIMP scenario.
学科主题Astronomy & Astrophysics ; Physics
语种英语
源URL[http://ir.itp.ac.cn/handle/311006/27038]  
专题理论物理研究所_理论物理所1978-2010年知识产出
作者单位1.Indin Inst Technol Guwahati, Dept Phys, North Guwahati 781039, Assam, India
2.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
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Barman, Basabendu,Bhattacharya, Subhaditya,Zakeri, Mohammadreza. Non-Abelian vector boson as FIMP dark matter[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2020(2):29.
APA Barman, Basabendu,Bhattacharya, Subhaditya,&Zakeri, Mohammadreza.(2020).Non-Abelian vector boson as FIMP dark matter.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(2),29.
MLA Barman, Basabendu,et al."Non-Abelian vector boson as FIMP dark matter".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .2(2020):29.

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来源:理论物理研究所

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