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000408367 0247_ $$2datacite_doi$$a10.3204/DESY-PROC-2013-04/cicoli_michele
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000408367 1001_ $$0P:(DE-HGF)0$$aCicoli, M.$$b0$$eCorresponding author
000408367 1112_ $$0C13-06-24.5$$2inspire$$a9th Patras Workshop on Axions, WIMPs and WISPs$$cMainz$$d2013-06-24 - 2013-06-28$$gAXION-WIMP 2013$$wGermany
000408367 245__ $$aAxion-like Particles from String Compactifications
000408367 260__ $$aHamburg$$bVerlag Deutsches Elektronen-Synchrotron$$c2013
000408367 29510 $$aCicoli, M. "Axion-like Particles from String Compactifications" in Proceedings, 9th Patras Workshop on Axions, WIMPs and WISPs (AXION-WIMP 2013) / Oberlack, Uwe, Sissol, Pierre (eds.), 2013 ; AXION-WIMP 2013 : 9th Patras Workshop on Axions, WIMPs and WISPs , 2013-06-23 - 2013-06-28, Mainz
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000408367 520__ $$aWe review how axion-like particles (ALPs) naturally emerge in the low-energy effective field theory of string compactifications. We focus on the study of their mass spectrum and couplings, stressing that they depend on the mechanism used to fix the moduli. We present concrete examples where either open or closed string modes behave as QCD axions which do not overproduce cold dark matter. Relativistic ALPs can also be produced by the decay of the lightest modulus which drives reheating. These ALPs contribute to dark radiation and could be detected via axion-photon conversion in astrophysical magnetic fields. 
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