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

Jen Chieh Peng; Wen Chen Chang; Hai Yang Cheng; Tie Jiun Hou; Keh Fei Liu; Jian Wei Qiu

doi:10.1016/j.physletb.2014.07.050

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

Jen Chieh Peng
, Wen Chen Chang
, Hai Yang Cheng
, Tie Jiun Hou
, Keh Fei Liu
, Jian Wei Qiu

Physics And Astronomy

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	411-414
Number of pages	4
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	736
DOIs	https://doi.org/10.1016/j.physletb.2014.07.050
State	Published - Sep 7 2014

Funding

We acknowledge helpful discussion with Jiunn-Wei Chen and Chien-Peng Yuan. This work was supported in part by the National Science Council of the Republic of China and the U.S. Department of Energy under contact Nos. DE-AC02-98CH10886 and DE-FG05-84ER40154 , and the National Science Foundation under grant Nos. PHY-0969739 and PHY-1316617 .

Funders	Funder number
National Science Foundation Arctic Social Science Program	PHY-0969739, PHY-1316617
U.S. Department of Energy	DE-FG05-84ER40154, DE-AC02-98CH10886
National Science Council

Keywords

D-(x)-u-(x)
Lattice QCD
Parton distributions
Sea quark

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2014.07.050

Cite this

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title = "On the momentum dependence of the flavor structure of the nucleon sea",

abstract = "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\textasciitilde{}. 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\textasciitilde{}. 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.",

keywords = "D-(x)-u-(x), Lattice QCD, Parton distributions, Sea quark",

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doi = "10.1016/j.physletb.2014.07.050",

language = "English",

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pages = "411--414",

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T1 - On the momentum dependence of the flavor structure of the nucleon sea

AU - Peng, Jen Chieh

AU - Chang, Wen Chen

AU - Cheng, Hai Yang

AU - Hou, Tie Jiun

AU - Liu, Keh Fei

AU - Qiu, Jian Wei

PY - 2014/9/7

Y1 - 2014/9/7

N2 - 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.

AB - 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.

KW - D-(x)-u-(x)

KW - Lattice QCD

KW - Parton distributions

KW - Sea quark

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U2 - 10.1016/j.physletb.2014.07.050

DO - 10.1016/j.physletb.2014.07.050

M3 - Article

AN - SCOPUS:84907350066

SN - 0370-2693

VL - 736

SP - 411

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

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

Abstract

Funding

Keywords

ASJC Scopus subject areas

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