The axion mass in modular invariant supergravity☆☆This work was supported in part by the Director, Office of Science, Office of High Energy and Nuclear Physics, Division of High Energy Physics of the US Department of Energy under Contract DE-AC03-76SF00098, in part by the National Science Foundation under grant PHY-0098840

Daniel Butter, Mary K. Gaillard
2005 Physics Letters B  
When supersymmetry is broken by condensates with a single condensing gauge group, there is a nonanomalous R-symmetry that prevents the universal axion from acquiring a mass. It has been argued that, in the context of supergravity, higher dimension operators will break this symmetry and may generate an axion mass too large to allow the identification of the universal axion with the QCD axion. We show that such contributions to the axion mass are highly suppressed in a class of models where the
more » ... models where the effective Lagrangian for gaugino and matter condensation respects modular invariance (T-duality).
doi:10.1016/j.physletb.2005.03.024 fatcat:vxmnjgnfgrh5npd5jm7zneeysy