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

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 t...

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Bibliographic Details
Main Authors: Umberto D'Alesio, Carlo Flore, Alexei Prokudin
Format: Article
Language:English
Published: Elsevier 2020-04-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269320301519
Description
Summary: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. Keywords: Transversity function, Soffer bound, Tensor charge, QCD, JLAB-THY-19-3130
ISSN:0370-2693