Neutrino Mass and Spontaneous Parity Nonconservation

enhanced production expected in n'p reactions. Figure 4 indicates the 95%-confidence-level cross-section limit over our mass range. " In summary, we find no evidence for production of narrow pp states produced in &'p b,t"pp. In particular, we are unable to confirm the existence of states at 2.02 and 2.20 GeV jc' reported in v-P —4f'PP. Those states would appear as &5standard-deviation effects in our experiment. The authors would like to thank the staffs of the Brookhaven National Laboratory alternatinggradient synchrotron, the MPS facility, On-Line Data Facility, Central Scientific Computing Facility, and the technical staff at Carnegie-Mellon University. In addition, we are grateful to G. Bunce and G. Guinther for their help during the data-taking phase of this experiment. This work was supported in part by the U. S. Department of Energy and the National Science Foundation.