On the momentum dependence of the flavor structure of the nucleon sea

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Title:	On the momentum dependence of the flavor structure of the nucleon sea
Authors:	彭仁傑;Peng, Jen-Chieh;Chang, Wen-Chen;Cheng, Hai-Yang;Hou, Tie-Jiun;Liu, Keh-Fei;Qiu, Jian-Wei
Contributors:	高能與強場物理研究中心
Keywords:	d¯(x)−u¯(x);formula omitted;Lattice QCD;NUCLEAR PHYSICS AND RADIATION PHYSICS;Parton distributions;Sea quark
Date:	2014-09-07
Issue Date:	2026-04-23 12:06:50 (UTC+8)
Publisher:	Elsevier;United States: Elsevier B.V
Abstract:	摘要： Difference between the u¯ and d¯ sea quark distributions in the proton was first observed in the violation of the Gottfried sum rule in deep-inelastic scattering (DIS) experiments. The parton momentum fraction x dependence of this difference has been measured over the region 0.02<x<0.35 from Drell–Yan and semi-inclusive DIS experiments. The Drell–Yan data suggested a possible sign-change for d¯(x)−u¯(x) near x∼0.3, which has not yet been explained by existing theoretical models. We present an independent evidence for the d¯(x)−u¯(x) sign-change at x∼0.3 from an analysis of the DIS data. We further discuss the x-dependence of d¯−u¯ in the context of meson cloud model and the lattice QCD formulation. 出版者： United States: Elsevier B.V 出版日期： 2014-09-07 出處： Physics Letters B, 2014-09, Vol.736 (C), p.411-414 資源來源： Elsevier ScienceDirect Journals 版權： 2014 The Authors 識別號： ISSN: 0370-2693 識別號： ISSN: 1873-2445 識別號： EISSN: 1873-2445 識別號： DOI: 10.1016/j.physletb.2014.07.050
Appears in Collections:	[Center for High Energy and High Field Physics (CHiP)] journal & Dissertation

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