Search for narrow high mass states at Fermilab

A search has been made in neutron beryllium interactions for neutral narrow enhancements produced at Feynman x≳0.2. Upper limits are presented for production cross sections times branching ratio into the 2‐body channels π+π−, π+K−, pK− and p? for masses in the interval 2 GeV≲m≲4 GeV.