New weakly-coupled forces hidden in low-energy QCD

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 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 ($\eta ,{\eta }^{\prime },\varphi ,\omega$) as a ${\pi }^0\gamma$ resonance, which is its leading decay mode from 140 - 620 MeV. This is a new discovery window for forces beyond the Standard Model that is not covered by existing dark photon searches.

14 pages

References in corpus (11)

• A Theory of Dark Matter
• Secluded WIMP Dark Matter
• Secluded U(1) below the weak scale
• New Fixed-Target Experiments to Search for Dark Gauge Forces
• Cores in Dwarf Galaxies from Dark Matter with a Yukawa Potential
• U-boson production in e+e- annihilations, psi and Upsilon decays, and Light Dark Matter
• Study of the decay K+ => pi+,nu,nubar in the momentum region 140<Ppi<199 MeV/c
• Probing a Secluded U(1) at B-factories
• Neutron scattering and extra short range interactions
• Bounds on new light particles from high-energy and very small momentum transfer np elastic scattering data
• rho(omega)-> pi^0 pi^0 gamma, rho(omega) -> eta pi^0 gamma decays in the local quark Nambu--Jona-Lasinio model

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