Search for the lepton-number-violating decay Xi- ---> p mu- mu-
/ Authors
D. Rajaram, R. Burnstein, A. Chakravorty, A. Chan, Y. Chen, W. Choong, K. Clark, E. Dukes, C. Durandet, J. Félix
and 25 more authors
G. Gidal, P. Gu, H. Gustafson, C. Ho, T. Holmstrom, M. Huang, C. James, C. Jenkins, D. Kaplan, L. Lederman, N. Leros, M. Longo, F. Lopez, L. Lu, W. Luebke, K. Luk, K. Nelson, H. Park, J. Perroud, H. Rubin, P. Teng, J. Volk, C. White, S. White, P. Żyła
/ Abstract
A sensitive search for the lepton-number-violating decay Xi(-)-->pmu(-)mu(-) has been performed using a sample of approximately 10(9) Xi(-) hyperons produced in 800 GeV/c p-Cu collisions. We obtain B(Xi(-)-->pmu(-)mu(-))<4.0x10(-8) at 90% confidence, improving on the best previous limit by 4 orders of magnitude.
Journal: Physical Review Letters