(d)over-bar - (u)over-bar Flavor Asymmetry in the Proton in Chiral Effective Field Theory

	(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)
刊名	FEW-BODY SYSTEMS
	2015
卷号	56 期号:6-9 页码:355-362
通讯作者	Salamu Y
英文摘要	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.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI ; CA
WOS记录号	WOS:000360435800018
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228638]
专题	高能物理研究所_理论物理室
推荐引用方式 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.