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

页数：19

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