Dark matter casts light on the early Universe

被引：17

作者：

Arbey, A. ^{[1
,2
,6
]}

Ellis, J. ^{[2
,3
,4
]}

Mahmoudi, F. ^{[1
,2
]}

Robbins, G. ^{[1
,5
]}

机构：

[1] Univ Lyon 1, Univ Lyon, Inst Phys Nucl Lyon, CNRS,IN2P3,UMR5822, F-69622 Villeurbanne, France

[2] CERN, Theoret Phys Dept, CH-1211 Geneva 23, Switzerland

[3] Kings Coll London, Dept Phys, Theoret Particle Phys & Cosmol Grp, London WC2R 2LS, England

[4] NICPB, Ravala 10, EE-10143 Tallinn, Estonia

[5] Univ Lyon 1, Univ Lyon, ENS Lyon, CNRS,Ctr Rech Astrophys Lyon,UMR5574, F-69230 St Genis Laval, France

[6] Inst Univ France, 103 Blvd St Michel, F-75005 Paris, France

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 10期

关键词：

Beyond Standard Model; Cosmology of Theories beyond the SM; Supersymmetric Standard Model; COSMOLOGICAL MODULI PROBLEM; FLAVOR PHYSICS OBSERVABLES; CALCULATING RELIC DENSITY; SUPERSYMMETRY BREAKING; STABLE PARTICLES; ENERGY; QUINTESSENCE; PROGRAM; SCALAR; NEUTRALINO;

D O I：

10.1007/JHEP10(2018)132

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 show how knowledge of the cold dark matter (CDM) density can be used, in conjunction with measurements of the parameters of a scenario for beyond the Standard Model (BSM) physics, to provide information about the evolution of the Universe before Big Bang Nucleosynthesis (BBN). As examples of non-standard evolution, we consider models with a scalar field that may decay into BSM particles, and quintessence models. We illustrate our calculations using various supersymmetric models as representatives of classes of BSM scenarios in which the CDM density is either larger or smaller than the observed density when the early Universe is assumed to be radiation-dominated. In the case of a decaying scalar field, we show how the CDM density can constrain the initial scalar density and the reheating temperature after it decays in BSM scenarios that would yield overdense dark matter in standard radiation-dominated cosmology, and how the decays of the scalar field into BSM particles can be constrained in scenarios that would otherwise yield underdense CDM. We also show how the early evolution of the quintessence field can be constrained in BSM scenarios.

引用

页数：25

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