Probing Ultra-light Primordial Black Holes as a Dark Matter Candidate Anupam Ray

2025-05-02 0 0 348.18KB 4 页 10玖币

侵权投诉

Probing Ultra-light Primordial Black Holes as a

Dark Matter Candidate

Anupam Ray

Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400005, India

anupam.ray@theory.tifr.res.in

Abstract. Dark Matter (DM) is omnipresent in our universe. Despite

its abundance, the microscopic identity of DM still remains a mystery.

Primordial black holes (PBHs), possibly formed via gravitational collapse

of large density perturbations in the early universe, are one of the earliest

proposed and viable DM candidates. Recent studies indicate that PBHs

can make up a large or even entire fraction of the DM density for a wide

range of masses. Here, we brieﬂy review the observational constraints

on PBHs as DM, concentrating on the ultra-light mass window. Ultra-

light PBHs emit particles via Hawking radiation and can be probed by

observing such Hawking evaporated particles in various space as well as

ground based detectors. We also outline how next-generation gamma ray

telescopes can set a stringent exclusion limit on ultra-light PBH DM by

probing low energy photons.

Keywords: Primordial Black Holes, Hawking Radiation, Dark Matter

1 Introduction

Cosmological observations provide unambiguous evidence of a non-relativistic,

collision-less, and weakly interacting non-baryonic matter, commonly known as

dark matter (DM), as a dominant component of the Universe [1]. Many well-

motivated DM candidates have been proposed, and decades of experimental

searches have been conducted to hunt for these mysterious DM particles, yet the

microscopic identity remains unknown. Primordial black holes (PBHs), possibly

formed via gravitational collapse of large overdensities in the very early universe

are one of the earliest proposed and viable DM candidates [2,3,4].

PBHs have a wide range of masses depending on their time of formation, and

can constitute a large or even entire fraction of the present day DM density in

the mass range of ∼1017 −1023 g. The idea of PBHs as DM has recently received

a renewed attention with the detection of a BH merger by the LIGO-Virgo col-

laboration and the subsequent proposals that the BH merger can be primordial

in origin [5,6,7]. Several techniques have been implemented in order to probe

the PBH fraction of DM, yields a multitude of observational constraints [8,9,10].

Here, we brieﬂy review the current status of PBHs as DM, mostly concentrating

on the ultra-light mass window.

arXiv:2210.00072v2 [hep-ph] 10 Oct 2022

文档加载中……请稍候！
如果长时间未打开，您也可以点击刷新试试。

下载文档到电脑，查找使用更方便

10 玖币 0人已下载

立即下载

摘要：

ProbingUltra-lightPrimordialBlackHolesasaDarkMatterCandidateAnupamRayTataInstituteofFundamentalResearch,HomiBhabhaRoad,Mumbai,400005,Indiaanupam.ray@theory.tifr.res.inAbstract.DarkMatter(DM)isomnipresentinouruniverse.Despiteitsabundance,themicroscopicidentityofDMstillremainsamystery.Primordialblackh...

展开>> 收起<<

Probing Ultra-light Primordial Black Holes as a Dark Matter Candidate Anupam Ray.pdf

共4页,预览1页

还剩页未读，继续阅读

声明：本站为文档C2C交易模式，即用户上传的文档直接被用户下载，本站只是中间服务平台，本站所有文档下载所得的收益归上传人(含作者)所有。玖贝云文库仅提供信息存储空间，仅对用户上传内容的表现方式做保护处理，对上载内容本身不做任何修改或编辑。若文档所含内容侵犯了您的版权或隐私，请立即通知玖贝云文库，我们立即给予删除！

Probing Ultra-light Primordial Black Holes as a Dark Matter Candidate Anupam Ray

相关推荐

开通VIP享超值会员特权

作者详情

相关内容

热门标签

举报选择: