Journal of High Energy Physics

, 2019:159 | Cite as

Axion clockworks from heterotic M-theory: the QCD-axion and its ultra-light companion

  • Sang Hui ImEmail author
  • Hans Peter Nilles
  • Marek Olechowski
Open Access
Regular Article - Theoretical Physics


A previously discussed clockwork mechanism within heterotic M-theory is applied to its axion landscape. We identify a unique candidate for a QCD-axion with a decay constant in the preferred “axion window” around 1011 GeV. It is accompanied by at least one ultra-light axion that couples predominantly to hidden sector gauge groups.


Beyond Standard Model M-Theory Superstrings and Heterotic Strings Field Theories in Higher Dimensions 


Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited


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Copyright information

© The Author(s) 2019

Authors and Affiliations

  • Sang Hui Im
    • 1
    Email author
  • Hans Peter Nilles
    • 2
  • Marek Olechowski
    • 3
  1. 1.Department of PhysicsPusan National UniversityBusanKorea
  2. 2.Bethe Center for Theoretical Physics and Physikalisches Institut der Universität BonnBonnGermany
  3. 3.Institute of Theoretical Physics, Faculty of PhysicsUniversity of WarsawWarsawPoland

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