BOSE-EINSTEIN CORRELATIONS IN NEUTRINO AND ANTINEUTRINO INTERACTIONS IN DEUTERIUM

none33siBose-Einstein correlations between pions of equal charge have been observed in Charged Current and Neutral Current (anti)neutrino-deuterium interactions in the BEBC bubble chamber exposed to the SPS wide band beam. The pion emission region is found to be essentially spherical with a mean radius of (0.48±0.07) fm; the chaoticity parameter is 0.36±0.04. © 1988 Springer-Verlag.noneAllasia D.; Angelini C.; Baldini A.; Bertanza L.; Bianchi F.; Bigi A.; Bobisut F.; Borg A.; Capiluppi P.; Cirio R.; Derkaoui J.; Faccini-Turluer M.L.; Frodesen A.G.; Gamba D.; Giacomelli G.; Jongejans B.; Mandrioli G.; Margiotta-Neri A.; Marzari-Chiesa A.; Pazzi R.; Patrizii L.; Petri C.; Predieri F.; Romero A.; Rossi A.M.; Sconza A.; Serra-Lugaresi P.; Spurio M.; Tenner A.G.; van Apeldoorn G.W.; van Dam P.H.A.; van Eijndoven N.A.M.; Vignaud D.Allasia D.; Angelini C.; Baldini A.; Bertanza L.; Bianchi F.; Bigi A.; Bobisut F.; Borg A.; Capiluppi P.; Cirio R.; Derkaoui J.; Faccini-Turluer M.L.; Frodesen A.G.; Gamba D.; Giacomelli G.; Jongejans B.; Mandrioli G.; Margiotta-Neri A.; Marzari-Chiesa A.; Pazzi R.; Patrizii L.; Petri C.; Predieri F.; Romero A.; Rossi A.M.; Sconza A.; Serra-Lugaresi P.; Spurio M.; Tenner A.G.; van Apeldoorn G.W.; van Dam P.H.A.; van Eijndoven N.A.M.; Vignaud D

SEARCH FOR FRACTIONALLY CHARGED-PARTICLES IN (ANTI)NEUTRINO-DEUTERIUM INTERACTIONS

A search for relativistic fractionally charged particles in (anti)neutrino-deuterium interactions was performed using the CERN SPS wide-band neutrino beam and the Big European Bubble Chamber. The experiment established the following upper limit: quark/event <5×10-5 (90% confidence level) for charged particles with 0.3e<0.7e, interaction length >0.02, and mass mq<0.5 GeV. Other limits are quoted in the text. © 1988 The American Physical Society