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Parton distributions in light-front holographic QCD
2018-12-12  【 】【打印】【关闭

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

Seminar

Title

题目

Parton distributions in light-front holographic QCD 

Speaker

报告人

Dr. Tianbo Liu 

Affiliation

所在单位

Jefferson Lab and Duke University

Date

日期

201812月12日(周三)上午10:00 

Venue

地点

Conference Room 322, ITP main building

Abstract

摘要

We determine the structure of generalized parton distributions from light-front holographic QCD up to a universal reparametrization function w(x), which incorporates Regge behavior at small-x and inclusive counting rules at large-x. A simple ansatz for w(x) which fulfills the physical constraints leads to precise descriptions of both nucleon and pion valence quark distribution functions. The analytic structure provides a nontrivial connection with hadron spectrum. Keeping the holographic structure, we can unambiguously introduce quark masses, preserving the harding scattering counting rule at large-Q and the inclusive counting rule at large-x. Within the light-front holographic framework, we predict the nucleon strange quark form factor and the asymmetric strange sea distribution up to a normalization factor. Together with lattice QCD data, we derive a lower limit on the intrinsic strange sea of the nucleon..

Contact Person

所内联系人

邹冰松

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