New mechanism of producing superheavy Dark Matter

被引：13

作者：

Babichev, Eugeny ^{[1
]}

Gorbunov, Dmitry ^{[2
,3
]}

Ramazanov, Sabir ^{[4
]}

机构：

[1] Univ Paris Sud, Univ Paris Saclay, CNRS, Lab Phys Theor, F-91405 Orsay, France

[2] Russian Acad Sci, Inst Nucl Res, 60th October Anniversary Prospect 7a, Moscow 117312, Russia

[3] Moscow Inst Phys & Technol, Inst Per 9, Dolgoprudnyi 141700, Russia

[4] Czech Acad Sci, Inst Phys, CEICO, Na Slovance 1999-2, Prague 18221 8, Czech Republic

来源：

PHYSICS LETTERS B | 2019年 / 794卷

关键词：

ENERGY COSMIC-RAYS; PARTICLE-PRODUCTION; SCALARON; CREATION; HIGGS; VACUUM;

D O I：

10.1016/j.physletb.2019.05.030

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study in detail the recently proposed mechanism of generating superheavy Dark Matter with the mass larger than the Hubble rate at the end of inflation. A real scalar field constituting Dark Matter linearly couples to the inflaton. As a result of this interaction, the scalar gets displaced from its zero expectation value. This offset feeds into the energy density of Dark Matter. This mechanism is universal and can be implemented in a generic inflationary scenario. Phenomenology of the model is comprised of Dark Matter decay into inflatons, which in turn decay into Standard Model species triggering cascades of high energy particles contributing to the cosmic ray flux. We evaluate the lifetime of Dark Matter and obtain limits on the inflationary scenarios, where this mechanism does not lead to the conflict with the Dark Matter stability considerations/studies of cosmic ray propagation. (C) 2019 The Authors. Published by Elsevier B.V.

引用

页码：69 / 76

页数：8

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