Evidence for theϒ′′and a Search for New Narrow Resonances

Abstract

The production of the $\Upsilon$ family in proton-nucleus collisions is clarified by a sixfold increase in statistics. Constraining $\Upsilon$,${\Upsilon }^{\prime }$ masses to those observed at DORIS we find the statistical significance of the ${\Upsilon }^{\prime \prime }$ to be 11 standard deviations. The dependence of $\Upsilon$ production on $p_t$, $y$, and $s$ is presented. Limits for other resonance production in the mass range 4-18 GeV are determined.