Couplings between QCD axion and photon from string compactification

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Title
Couplings between QCD axion and photon from string compactification
Author(s)
Jihn E. Kim; Soonkeon Nam
Publication Date
2016-08
Journal
PHYSICS LETTERS B, v.759, no., pp.149 - 153
Publisher
ELSEVIER SCIENCE BV
Abstract
The QCD axion couplings of various invisible axion models are presented. In particular, the exact global symmetry U(1)PQU(1)PQ in the superpotential is possible for the anomalous U(1) from string compactification, broken only by the gauge anomalies at one loop level, and is shown to have the resultant invisible axion coupling to photon, View the MathML sourcecaγγ≥83−caγγchbr where View the MathML sourcecaγγchbr≃2. However, this bound is not applicable in approximate U(1)PQU(1)PQ models with sufficiently suppressed U(1)PQU(1)PQ-breaking superpotential terms. We also present a simple method to obtain View the MathML sourcecaγγ0 which is the value obtained above the electroweak scale. ©2016 The Authors.
URI
https://pr.ibs.re.kr/handle/8788114/2886
ISSN
0370-2693
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
Files in This Item:
5. [김진의 PDF] Couplings between QCD axion and photon from string compactification (IBS 소속표기).pdfDownload

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