Cosmological constraints on dark scalar

被引：15

作者：

Ibe, Masahiro ^{[1
,2
]}

Kobayashi, Shin ^{[1
]}

Nakayama, Yuhei ^{[1
]}

Shirai, Satoshi ^{[2
]}

机构：

[1] Univ Tokyo, ICRR, Kashiwa, Chiba 2778582, Japan

[2] Univ Tokyo, Univ Tokyo Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2022年 / 2022卷 / 03期

关键词：

Cosmology of Theories BSM; New Light Particles; SPECTRAL DISTORTIONS; TEMPERATURE; UNIVERSE;

D O I：

10.1007/JHEP03(2022)198

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 discuss cosmological constraints on a dark scalar particle mixing with the Standard Model Higgs boson. We pay particular attention to the dark scalar production process when the reheating temperature of the Universe is very low, which allows us to give a conservative limit on the low-mass scalar particle. We also study the effect of the self-interaction of the dark scalars and find this has a significant impact on the cosmological constraints. We obtain the most conservative cosmological constraint on the dark scalar, which is complementary to accelerator experiments and astrophysical observations.

引用

页数：40

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