Strange form factors of the proton:: a new analysis of the v ((v)over-bar) data of the BNL-734 experiment

被引：41

作者：

Alberico, WM

Barbaro, MB

Bilenky, SM

Caballero, JA

Giunti, C

Maieron, C

de Guerra, EM

Udías, JM

机构：

[1] Univ Turin, Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[2] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy

[3] Joint Inst Nucl Res, Dubna, Russia

[4] Tech Univ Munich, Inst Theoret Phys, D-58748 Garching, Germany

[5] Univ Sevilla, Dept Fis Anat Mol & Nucl, E-41080 Seville, Spain

[6] CSIC, Inst Estructura Mat, E-28006 Madrid, Spain

[7] MIT, Ctr Theoret Phys, Nucl Sci Lab, Cambridge, MA 02139 USA

[8] MIT, Dept Phys, Cambridge, MA 02139 USA

[9] Univ Complutense Madrid, Dept Fis ATom Mol & Nucl, E-28040 Madrid, Spain

来源：

NUCLEAR PHYSICS A | 1999年 / 651卷 / 03期

关键词：

strange form factors; neutrino-nucleon (nucleus) scattering;

D O I：

10.1016/S0375-9474(99)00142-6

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：

We consider ratios of elastic nu(<(nu)over bar>)-proton cross sections measured by the Brookhaven BNL-734 experiment and use them to obtain the neutral current (NC) over charged current (CC) neutrino-antineutrino asymmetry. We discuss the sensitivity of these ratios and of the asymmetry to the electric, magnetic and axial strange form factors of the nucleon and to the axial cutoff mass M-A. We show that the effects of the nuclear structure and interactions on the asymmetry and, in general, on ratios of cross sections are negligible. We find some restrictions on the possible values of the parameters characterizing the strange form factors. We show that a precise measurement of the neutrino-antineutrino asymmetry would allow the extraction of the axial and vector magnetic strange form factors in a model independent way. The neutrino-antineutrino asymmetry turns out to be almost independent on the electric strange form factor and on the axial cutoff mass. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：277 / 286

页数：10

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