TY  - CONF
AU  - Marsh, M. C. D.
TI  - Hints of a Cosmic Axion Background
IS  - DESY-PROC-2013-04
CY  - Hamburg
PB  - Verlag Deutsches Elektronen-Synchrotron
M1  - PUBDB-2018-02805
M1  - DESY-PROC-2013-04
SN  - 978-3-935702-83-6 
T2  - DESY-PROC
SP  - 159-163
PY  - 2013
AB  - In models of particle physics and cosmology arising from compactifications of string theory , the reheating of the standard model after inflation generically proceeds through the decay of heavy moduli. Non-vanishing branching ratios for moduli decay into axions generate axionic dark radiation which linger in the present universe as a homogeneous and isotropic background of relativistic axions, hence called the Cosmic Axion Background (CAB). Axion-photon conversion in magnetic fields may render the CAB visible, and we show that the soft X-ray excess observed in galaxy clusters may provide hints for the existence of a CAB.
T2  - 9th Patras Workshop on Axions, WIMPs and WISPs
CY  - 24 Jun 2013 - 28 Jun 2013, Mainz (Germany)
Y2  - 24 Jun 2013 - 28 Jun 2013
M2  - Mainz, Germany
KW  - Hypothetisches Teilchen (gnd)
LB  - PUB:(DE-HGF)29 ; PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.3204/DESY-PROC-2013-04/marsh_david
UR  - https://bib-pubdb1.desy.de/record/408352
ER  -