Possible Evidence for Narrow States in Missing-Mass Spectra of theB=2,T=1System

Abstract

The missing-mass spectra for the transfer reactions $p({}_{}{}^3{}_{}{}^{}\mathrm{He},d)X$ and ${}_{}{}^3{}_{}{}^{}\mathrm{He}\mathrm{}(p,d)X$ ($B=2\mathrm{}$, $T=1\mathrm{}$) have been measured at, respectively, $T_{{}_{}{}^3{}_{}{}^{}\mathrm{He}}=2.7\mathrm{}$ GeV and $T_p=0.925\mathrm{}$ GeV. The data show a narrow structure lying on top of an important continuum, with a mass $M=2.240\mathrm{}\pm 0.005$ GeV and a width ${\Gamma }_{\frac{1}{2}}=0.016\mathrm{}\pm 0.003$ GeV.