  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.
