Abstract
We report a search for a dark vector gauge boson that couples to quarks in the decay chain , . No signal is found and we set a mass-dependent limit on the baryonic fine structure constant of in the mass range of 290 to . This analysis is based on a data sample of collected by the Belle experiment at the KEKB asymmetric-energy collider.
- Received 19 September 2016
DOI:https://doi.org/10.1103/PhysRevD.94.092006
© 2016 American Physical Society