Role of the Soffer bound in determination of transversity and the tensor charge

被引：21

作者：

D'Alesio, Umberto ^{[1
,2
]}

Flore, Carlo ^{[1
,2
,3
]}

Prokudin, Alexei ^{[4
,5
]}

机构：

[1] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, Italy

[2] INFN, Sez Cagliari, I-09042 Monserrato, CA, Italy

[3] Univ Paris Saclay, IJCLab, CNRS, F-91405 Orsay, France

[4] Penn State Univ Berks, Div Sci, Reading, PA 19610 USA

[5] Jefferson Lab, Theory Ctr, 12000 Jefferson Ave, Newport News, VA 23606 USA

来源：

PHYSICS LETTERS B | 2020年 / 803卷

基金：

美国国家科学基金会; 欧盟地平线“2020”;

关键词：

Transversity function; Soffer bound; Tensor charge; QCD; JLAB-THY-19-3130; PARTON DISTRIBUTIONS; SIVERS ASYMMETRIES; EVOLUTION; FRAGMENTATION; CONSTRAINTS; COLLINS; QUARKS; PIONS; KAONS;

D O I：

10.1016/j.physletb.2020.135347

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The transversity and the tensor charge of the nucleon, currently under active investigation experimentally and theoretically, are fundamental quantities in hadron physics as well as for our comprehension of the nucleon structure. Some tension between the values of the tensor charge, as computed on the basis of phenomenological extractions and lattice QCD calculations, has been observed. In this letter, by means of an explicit example, we study the role of assumptions, usually adopted in phenomenological parametrizations, and we show that, by relaxing some of them, such a tension could be eased. (C) 2020 The Authors. Published by Elsevier B.V.

引用

页数：7

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