TY  - JOUR
AU  - Ringwald, Andreas
TI  - Searching for axions and ALPs from string theory
JO  - Journal of physics / Conference Series
VL  - 485
IS  - DESY-12-151
SN  - 1742-6596
CY  - Bristol
PB  - IOP Publ.
M1  - DESY-2014-02718
M1  - DESY-12-151
SP  - 012013 
PY  - 2014
AB  - We review searches for closed string axions and axion–like particles (ALPs) in IIB string flux compactifications. For natural values of the background fluxes and TeV scale gravitino mass, the moduli stabilisation mechanism of the LARGE Volume Scenario predicts the existence of a QCD axion candidate with intermediate scale decay constant, fa   109÷12 GeV, associated with the small cycles wrapped by the branes hosting the visible sector, plus a nearly massless and nearly decoupled ALP associated with the LARGE cycle. In setups where the visible sector branes are wrapping more than the minimum number of two intersecting cycles, there are more ALPs which have approximately the same decay constant and coupling to the photon as the QCD axion candidate, but which are exponentially lighter. There are exciting phenomenological opportunities to search for these axions and ALPs in the near future. For fa   1011÷12 GeV, the QCD axion can be the dominant part of dark matter and be detected in haloscopes exploiting microwave cavities. For fa   109÷10 GeV, the additional ALPs could explain astrophysical anomalies and be searched for in the upcoming generation of helioscopes and light–shining–through–a–wall experiments.
T2  - 18th International Symposium on Particles, Strings and Cosmology
CY  - 3 Jun 2012 - 8 Jun 2012, Merida (Mexico)
Y2  - 3 Jun 2012 - 8 Jun 2012
M2  - Merida, Mexico
KW  - quantum chromodynamics: axion (INSPIRE)
KW  - axion: string (INSPIRE)
KW  - compactification (INSPIRE)
KW  - moduli: stability (INSPIRE)
KW  - gravitino: mass (INSPIRE)
KW  - flux: string (INSPIRE)
KW  - photon: regeneration (INSPIRE)
KW  - membrane model (INSPIRE)
KW  - string model (INSPIRE)
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)15
DO  - DOI:10.1088/1742-6596/485/1/012013
UR  - https://bib-pubdb1.desy.de/record/168903
ER  -