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(d)over-bar - (u)over-bar Flavor Asymmetry in the Proton in Chiral Effective Field Theory
Salamu, Y; Ji, CR; Melnitchouk, W; Wang, P; 王平(理)
2015
发表期刊FEW-BODY SYSTEMS
卷号56期号:6-9页码:355-362
通讯作者Salamu Y
摘要The (d) over bar - (u) over bar flavor asymmetry in the proton arising from pion loops is computed using chiral effective field theory. The calculation includes both nucleon and Delta intermediate states, and uses both the fully relativistic and heavy baryon frameworks. The x dependence of extracted from the Fermilab E866 Drell-Yan data can be well reproduced in terms of a single transverse momentum cutoff parameter regulating the ultraviolet behavior of the loop integrals. In addition to the distribution at x > 0, corrections to the integrated asymmetry from zero momentum contributions are computed, which arise from pion rainbow and bubble diagrams at x = 0. These have not been accounted for in previous analyses, and can make important contributions to the lowest moment of (d) over bar - (u) over bar.
文章类型Article
学科领域Physics
DOI10.1007/s00601-015-0949-0
收录类别SCI ; CA
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000360435800018
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228638
专题理论物理室
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GB/T 7714
Salamu, Y,Ji, CR,Melnitchouk, W,et al. (d)over-bar - (u)over-bar Flavor Asymmetry in the Proton in Chiral Effective Field Theory[J]. FEW-BODY SYSTEMS,2015,56(6-9):355-362.
APA Salamu, Y,Ji, CR,Melnitchouk, W,Wang, P,&王平.(2015).(d)over-bar - (u)over-bar Flavor Asymmetry in the Proton in Chiral Effective Field Theory.FEW-BODY SYSTEMS,56(6-9),355-362.
MLA Salamu, Y,et al."(d)over-bar - (u)over-bar Flavor Asymmetry in the Proton in Chiral Effective Field Theory".FEW-BODY SYSTEMS 56.6-9(2015):355-362.
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