title: Searching for Axionlike Particles in Flavor-Changing Neutral Current Processes.
abstract: We propose new searches for axionlike particles (ALPs) produced in flavor-changing neutral current (FCNC) processes. This proposal exploits the often-overlooked coupling of ALPs to W^{±} bosons, leading to FCNC production of ALPs even in the absence of a direct coupling to fermions. Our proposed searches for resonant ALP production in decays such as B→K^{(*)}a, a→γγ, and K→πa, a→γγ could greatly improve upon the current sensitivity to ALP couplings to standard model particles. We also determine analogous constraints and discovery prospects for invisibly decaying ALPs.
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: Eder
authors.initials: E
authors.lastname: Izaguirre
authors.affiliation: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.|Berkeley Center for Theoretical Physics, University of California, Berkeley, California 94720, USA.
authors.forename: Tongyan
authors.initials: T
authors.lastname: Lin
authors.affiliation: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
authors.forename: Brian
authors.initials: B
authors.lastname: Shuve