SPIN ALIGNMENT AND PARITY VIOLATION EFFECTS IN RHO(0) PRODUCTION IN NEUTRINO AND ANTINEUTRINO CHARGED-CURRENT INTERACTIONS

Citation
Vg. Zaetz et al., SPIN ALIGNMENT AND PARITY VIOLATION EFFECTS IN RHO(0) PRODUCTION IN NEUTRINO AND ANTINEUTRINO CHARGED-CURRENT INTERACTIONS, Zeitschrift fur Physik. C, Particles and fields, 66(4), 1995, pp. 583-590
Citations number
24
Categorie Soggetti
Physics, Particles & Fields
ISSN journal
01709739
Volume
66
Issue
4
Year of publication
1995
Pages
583 - 590
Database
ISI
SICI code
0170-9739(1995)66:4<583:SAAPVE>2.0.ZU;2-8
Abstract
Most of the measured events on hydrogen, deuterium and neon targets fr om BEBC at CERN and the 15-foot Bubble Chamber at Fermilab are combine d to measure spin-density matrix elements for rho(0) production in the current-fragmentation region in neutrino and antineutrino charged-cur rent interactions. The spin-alignment parameter eta is found to be 0.0 8 +/- 0.11 for neutrino and 0.41 +/- O.11 for antineutrino interaction s. The parity-odd density matrix element Im(rho(10) + rho(-10)) is con sistent with zero in both reactions. In the combined neutrino and anti neutrino data an indication of parity violation is observed: Im rho(1- 1) = 0.38 +/- 0.16 at x(B) > 0.2, Q(2) > 8 GeV2 and z > 0.6.