Widening the axion window via kinetic and stückelberg mixings
Entity
UAM. Departamento de Física TeóricaPublisher
American Physical SocietyDate
2015-10-27Citation
10.1103/PhysRevLett.115.181601
Physical Review Letters 115.18 (2015): 181601
ISSN
0031-9007 (print); 1079-7114 (online)DOI
10.1103/PhysRevLett.115.181601Funded by
The work of G. S. and F. Y. is supported in part by the DOE Grant No. DE-FG-02-95ER40896 and the HKRGC Grants No. HKUST4/CRF/13G, No. 604231, and No. 16304414. W. S. is supported by the ERC Advanced Grant SPLE under Contract No. ERC-2012-ADG-20120216-320421, by Grant No. FPA2012-32828 from the MINECO, and Grant No. SEV-2012-0249 of the “Centro de Excelencia Severo Programme. W. S. would also like to thank the European COST Action No. MP1210 “The String Theory Universe” for a Short Term Scientific Mission GrantProject
Gobierno de España. FPA2012-32828; Gobierno de España. SEV-2012-0249Editor's Version
http://dx.doi.org/10.1103/PhysRevLett.115.181601Subjects
Bosons; Dark matter; Decay constants; Minimal model; Non-abelian groups; FísicaRights
©2015 American Physical SocietyAbstract
We point out that kinetic and Stückelberg mixings that are generically present in the low energy effective action of axions can significantly widen the window of axion decay constants. We show that an effective super-Planckian decay constant can be obtained even when the axion kinetic matrix has only sub-Planckian entries. Our minimal model involves only two axions, a Stückelberg U(1) and a modest rank instanton generating non-Abelian group. Below the mass of the Stückelberg U(1), there is only a single axion with a nonperturbatively generated potential. In contrast to previous approaches, the enhancement of the axion decay constant is not tied to the number of degrees of freedom introduced. We also discuss how kinetic mixings can lower the decay constant to the desired axion dark matter window. String theory embeddings of this scenario and their phenomenological features are briefly discussed
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Google Scholar:Shiu, Gary
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Staessens, Wieland
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Ye, Fang
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