Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 8, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP08(2021)058
Keywords
Beyond Standard Model; Effective Field Theories; Renormalization Group; Compactification and String Models
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Funding
- IBS [IBS-R018-D1]
- Ministry of Science & ICT (MSIT), Republic of Korea [IBS-R018-D1-2021-A00] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The study investigates the renormalization group running of axion couplings, finding that string-theoretic axions have a noticeable difference in low energy couplings compared to KSVZ-like axions. This difference might be testable in future axion search experiments.
We study the renormalization group running of axion couplings while taking into account that the Standard Model can be extended to its supersymmetric extension at a certain energy scale below the axion decay constant. We then apply our results to three different classes of axion models, i.e. KSVZ-like, DFSZ-like, and string-theoretic axions, and examine if string-theoretic axions can be distinguished from others by having a different pattern of low energy couplings to the photon, nucleons and electron. We find that the low energy couplings of string-theoretic axions have a similar pattern as those of KSVZ-like axions but yet reveal a sizable difference which might be testable in future axion search experiments. We also note that the coupling of KSVZ-like QCD axions to the electron is dominated by a three-loop contribution involving the exotic heavy quark, gluons, top quark and Higgs field.
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