NUCLEON STRUCTURE UNCERTAINTIES IN PARITY-VIOLATING QUASI-ELASTIC ELECTRON-SCATTERING

被引：2
|
作者：
BERNARD, V
KAISER, N
MEISSNER, UG
机构：
[1] UNIV LOUIS PASTEUR STRASBOURG,F-67037 STRASBOURG,FRANCE
[2] NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK
[3] UNIV BERN,INST THEORET PHYS,CH-3012 BERN,SWITZERLAND
来源：
PHYSICS LETTERS B | 1990年 / 243卷 / 04期
关键词：
D O I：
10.1016/0370-2693(90)91410-D
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate the nucleon structure uncertainties for the extraction of the parity-violating asymmetry measured at Mainz by means of the 9Be(e, e′) reaction. We demonstrate that the contribution to the asymmetry from the quasi-elastic region is only mildly affected by the changes in the electromagnetic and axial nucleon form factors and by possible strangeness admixtures into the nucleon wave function. These nucleon structure effects do not alter the existing bounds on the weak neutral hadronic axial-vector coupling constants. The largest uncertainty actually arises from the neutron charge form factor. Similar conclusions can be drawn for the elastic electron-12C scattering experiment at Bates. © 1990.
引用
收藏
页码：439 / 443
页数：5
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