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New weakly coupled forces hidden in low-energy QCD

Sean Tulin

  • Michigan Center for Theoretical Physics, University of Michigan, Ann Arbor, Michigan 48109, USA

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Phys. Rev. D 89, 114008 – Published 5 June, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.114008

Abstract

Is it possible to detect a new weakly coupled force at the QCD scale that interacts primarily with quarks? This work investigates experimental signatures of a new MeV–GeV gauge boson that couples to the baryon number, with attention to the 100 MeV–GeV mass range that is the regime of nonperturbative QCD. Such a state can be searched for in rare radiative decays of light mesons (η,η′,ϕ,ω) as a π0γ resonance, which is its leading decay mode from 140 to 620 MeV. This is a new discovery window for forces beyond the Standard Model that is not covered by existing dark photon searches.

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Phys. Rev. D 89, 114008– Published 5 June, 2014
  • Received 21 April 2014

© 2014 American Physical Society

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