Valence Quark Ratio in the Proton

崔著钫; 高飞; Daniele Binosi; 常雷; Craig D.Roberts; Sebastian M.Schmidt

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Valence Quark Ratio in the Proton

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Beginning with precise data on the ratio of structure functions in deep inelastic scattering(DIS)from ^3He and ^3H,collected on the domain 0.19≤xB≤0.83,where xBis the Bjorken scaling variable,we employ a robust method for extrapolating such data to arrive at a model-independent result for the xB=1 value of the ratio of neutron and proton structure functions.Combining this with information obtained in analyses of DIS from nuclei,corrected for target-structure dependence,we arrive at a prediction for the proton valence-quark ratio:d_(v)/u_(v)|_(xB→1)=0.230(57).Requiring consistency with this result presents a challenge to many descriptions of proton structure.

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《中国物理快报：英文版》 |2022年第4期|1-6|共6页
作者
崔著钫; 高飞; Daniele Binosi; 常雷; Craig D.Roberts; Sebastian M.Schmidt;
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作者单位

School of Physics;

Nanjing University;

Nanjing 210093;

China;

Institute for Nonperturbative Physics;

Nanjing University;

Nanjing 210093;

China;

Centre for High Energy Physics;

Peking University;

Beijing 100871;

China;

European Centre for Theoretical Studies in Nuclear Physics and Related Areas;

Villa Tambosi;

Strada delle Tabarelle 286;

I-38123 Villazzano(TN);

Italy;

School of Physics;

Nankai University;

Tianjin 300071;

China;

Helmholtz-Zentrum Dresden-Rossendorf;

Dresden D-01314;

Germany;

RWTH Aachen University;

Ⅲ.Physikalisches Institut B;

Aachen D-52074;

Germany;

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原文格式 PDF
正文语种 chi
中图分类介子;
关键词
structure; functions; precise;

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Valence Quark Ratio in the Proton

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