Charge symmetry breaking in parton distribution functions from lattice QCD

被引：18

作者：

Horsley, R. ^{[1
]}

Nakamura, Y. ^{[2
,3
]}

Pleiter, D. ^{[4
]}

Rakow, P. E. L. ^{[5
]}

Schierholz, G. ^{[6
]}

Stueben, H. ^{[7
]}

Thomas, A. W. ^{[8
]}

Winter, F. ^{[1
,2
]}

Young, R. D. ^{[8
]}

Zanotti, J. M. ^{[1
]}

机构：

[1] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[3] Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki 3058577, Japan

[4] Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany

[5] Univ Liverpool, Div Theoret Phys, Dept Math Sci, Liverpool L69 3BX, Merseyside, England

[6] Deutsch Elektronen Synchrotron DESY, D-22603 Hamburg, Germany

[7] Konrad Zuse Zentrum Informat Tech Berlin, D-14195 Berlin, Germany

[8] Univ Adelaide, CSSM, Sch Phys & Chem, Adelaide, SA 5005, Australia

来源：

PHYSICAL REVIEW D | 2011年 / 83卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

NONPERTURBATIVE RENORMALIZATION;

D O I：

10.1103/PhysRevD.83.051501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

By determining the quark momentum fractions of the octet baryons from N-f = 2 + 1 lattice simulations, we are able to predict the degree of charge symmetry violation in the parton distribution functions of the nucleon. This is of importance, not only as a probe of our understanding of the nonperturbative structure of the proton, but also because such a violation constrains the accuracy of global fits to parton distribution functions and hence the accuracy with which, for example, cross sections at the LHC can be predicted. A violation of charge symmetry may also be critical in cases where symmetries are used to guide the search for physics beyond the standard model.

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页数：5

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