Dark matter axions in models of string cosmology

Ram Brustein; Merav Hadad

doi:10.1016/S0370-2693(98)01206-4

Dark matter axions in models of string cosmology

Ram Brustein, Merav Hadad

Department of Physics

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Axions are produced during a period of dilaton-driven inflation by amplification of quantum fluctuations. We show that for some range of string cosmology parameters and some range of axion masses, primordial axions may constitute a large fraction of the present energy density in the universe in the form of cold dark matter. Due to the periodic nature of the axion potential energy density fluctuations are strongly suppressed. The spectrum of primordial axions is not thermal, allowing a small fraction of the axions to remain relativistic until quite late.

Original language	English
Pages (from-to)	74-81
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	442
Issue number	1-4
DOIs	https://doi.org/10.1016/S0370-2693(98)01206-4
State	Published - 3 Dec 1998

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/S0370-2693(98)01206-4

Cite this

@article{5316fcb461e9486ab6d3ea66ab3c31b5,

title = "Dark matter axions in models of string cosmology",

abstract = "Axions are produced during a period of dilaton-driven inflation by amplification of quantum fluctuations. We show that for some range of string cosmology parameters and some range of axion masses, primordial axions may constitute a large fraction of the present energy density in the universe in the form of cold dark matter. Due to the periodic nature of the axion potential energy density fluctuations are strongly suppressed. The spectrum of primordial axions is not thermal, allowing a small fraction of the axions to remain relativistic until quite late.",

author = "Ram Brustein and Merav Hadad",

year = "1998",

month = dec,

day = "3",

doi = "10.1016/S0370-2693(98)01206-4",

language = "English",

volume = "442",

pages = "74--81",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1-4",

}

TY - JOUR

T1 - Dark matter axions in models of string cosmology

AU - Brustein, Ram

AU - Hadad, Merav

PY - 1998/12/3

Y1 - 1998/12/3

N2 - Axions are produced during a period of dilaton-driven inflation by amplification of quantum fluctuations. We show that for some range of string cosmology parameters and some range of axion masses, primordial axions may constitute a large fraction of the present energy density in the universe in the form of cold dark matter. Due to the periodic nature of the axion potential energy density fluctuations are strongly suppressed. The spectrum of primordial axions is not thermal, allowing a small fraction of the axions to remain relativistic until quite late.

AB - Axions are produced during a period of dilaton-driven inflation by amplification of quantum fluctuations. We show that for some range of string cosmology parameters and some range of axion masses, primordial axions may constitute a large fraction of the present energy density in the universe in the form of cold dark matter. Due to the periodic nature of the axion potential energy density fluctuations are strongly suppressed. The spectrum of primordial axions is not thermal, allowing a small fraction of the axions to remain relativistic until quite late.

UR - http://www.scopus.com/inward/record.url?scp=0346550087&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(98)01206-4

DO - 10.1016/S0370-2693(98)01206-4

M3 - Article

AN - SCOPUS:0346550087

SN - 0370-2693

VL - 442

SP - 74

EP - 81

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-4

ER -

Dark matter axions in models of string cosmology

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this