Constrained γZ interference corrections to parity-violating electron scattering

被引：34
|
作者：
Hall, N. L. [1 ,2 ]
Blunden, P. G. [3 ]
Melnitchouk, W.
Thomas, A. W. [1 ,2 ]
Young, R. D. [1 ,2 ]
机构：
[1] Univ Adelaide, Sch Chem & Phys, ARC Ctr Excellence Particle Phys Terascale, Adelaide, SA 5005, Australia
[2] Univ Adelaide, Sch Chem & Phys, CSSM, Adelaide, SA 5005, Australia
[3] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada
来源：
PHYSICAL REVIEW D | 2013年 / 88卷 / 01期
基金：
澳大利亚研究理事会; 加拿大自然科学与工程研究理事会;
关键词：
GENERALIZED VECTOR DOMINANCE; DEEP-INELASTIC SCATTERING; RADIATIVE-CORRECTIONS; PARTON DISTRIBUTIONS; EXCITATION;
D O I：
10.1103/PhysRevD.88.013011
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a comprehensive analysis of gamma Z interference corrections to the weak charge of the proton measured in parity-violating electron scattering, including a survey of existing models and a critical analysis of their uncertainties. Constraints from parton distributions in the deep-inelastic region, together with new data on parity-violating electron scattering in the resonance region, result in significantly smaller uncertainties on the corrections compared to previous estimates. At the kinematics of the Q(weak) experiment, we determine the gamma Z box correction to be Re square(V)(gamma Z) = (5.57 +/- 0.36) x 10(-3). The new constraints also allow precise predictions to be made for parity-violating deep-inelastic asymmetries on the deuteron.
引用
收藏
页数：19
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