Inelastic nu and (nu)over-bar scattering on nuclei and ''strangeness'' of the nucleon

被引:74
作者
Alberico, WM
Barbaro, MB
Bilenky, SM
Caballero, JA
Giunti, C
Maieron, C
deGuerra, EM
Udias, JM
机构
[1] UNIV TURIN,DIPARTMENTO FIS TEOR,I-10125 TURIN,ITALY
[2] JOINT INST NUCL RES,DUBNA,RUSSIA
[3] TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-320000 HAIFA,ISRAEL
[4] CSIC,INST ESTRUCTURA MAT,E-28006 MADRID,SPAIN
[5] UNIV SEVILLA,DPTO FIS ATOM MOL & NUCL,E-41080 SEVILLE,SPAIN
关键词
neutrino-nucleus scattering; strange form factors; nuclear model effects;
D O I
10.1016/S0375-9474(97)00416-8
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
Possibilities to extract information on the strange form factors of the nucleon from neutrino (anti-neutrino) inelastic scattering on nuclei, in an energy range from 200 MeV to 1 GeV and more, are investigated in detail. All calculations are performed within two relativistic independent particle models (Fermi gas and shell model); the final state interactions of the ejected nucleon are taken into account through relativistic optical model potentials. We have shown that the values of the cross sections significantly depend on the nuclear model (especially in the lower energy range). However, the NC/CC neutrino-anti-neutrino asymmetry in a medium-high energy range shows a rather small dependence on the model and allows to disentangle different values of the parameters that characterize the strange form factors. We have calculated also the ratio of the cross sections for inelastic NC scattering of neutrinos on nuclei, with the emission of a proton and of a neutron. Our calculations show that at high neutrino energy this ratio depends rather weakly on the nuclear model and confirm previous conclusions on the rather strong dependence of this ratio upon the axial strange form factors; however at E-nu less than or equal to 200 MeV, the FSI are found to significantly affect the ratio. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:471 / 497
页数:27
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