High-resolution search for the ${\Theta }^{+}$ pentaquark via a pion-induced reaction at J-PARC

PARC E19 Collaboration, M. Moritsu, S. Adachi +72

The pentaquark ${\Theta }^{+}$ has been searched for via the ${\pi }^{-}p\to K^{-}X$ reaction with beam momenta of 1.92 and 2.01 GeV/$c$ at J-PARC. A missing mass resolution of 2 MeV (FWHM) was achi…