EXCHANGE CURRENT CORRECTIONS TO NEUTRINO-NUCLEUS SCATTERING .1. NUCLEAR-MATTER

Authors
Citation
Y. Umino et Jm. Udias, EXCHANGE CURRENT CORRECTIONS TO NEUTRINO-NUCLEUS SCATTERING .1. NUCLEAR-MATTER, Physical review. C. Nuclear physics, 52(6), 1995, pp. 3399-3415
Citations number
60
Categorie Soggetti
Physics, Nuclear
ISSN journal
05562813
Volume
52
Issue
6
Year of publication
1995
Pages
3399 - 3415
Database
ISI
SICI code
0556-2813(1995)52:6<3399:ECCTNS>2.0.ZU;2-V
Abstract
Relativistic exchange current corrections to the impulse approximation in low and intermediate energy neutrino-nucleus scattering are presen ted assuming nonvanishing strange quark form factors for constituent n ucleons. Two-body exchange current operators which treat all SU(3) vec tor and axial currents on an equal footing are constructed by generali zing the soft-pion dominance method of Chemtob and Rho. For charged cu rrent reactions, exchange current corrections can reduce the impulse a pproximation results by 5 to 10 % depending on the nuclear density. A finite strange quark form factor may change the total cross section fo r neutral current scattering by 20% while exchange current corrections are found to be sensitive to the nuclear density. Implications on the current LSND experiment to extract the strange quark axial form facto r of the nucleon are discussed.