THE H(1)(Q)(X,Q(2)) DISTRIBUTIONS AND THE NUCLEON TENSOR CHARGES

We recall the definitions and the basic properties of the transversity distributions h(1)(q)(x, Q(2)) and the corresponding nucleon tensor c harges delta q(Q(2)). We briefly comment on different estimates from s everal phenomenological models and on the future possible measurements with the polarized pp collider at RHIC-BNL. Recent works on the Q(2)- evolution of h(1)(q)(x, Q(2)) and a positivity bound are also discusse d.