Speaker
Isabella Garzia
(INFN)
Description
We present a measurement of the azimuthal asymmetries
induced by the Collins effect in inclusive production of
charged pion pairs, in the e+e- -> pi pi X annihilation process,
where the two pions are produced in opposite hemispheres.
The data collected by the BABAR detector allows the determination
of the Collins fragmentation function as a function of
hadron fractional energies and transverse momenta, and can
be combined with semi-inclusive deep-inelastic-scattering
data to extract the transversity distribution function,
which is the least known leading-twist component of the
QCD description of the partonic structure of the nucleon.
Authors
Fabio Anulli
(Universita e INFN, Roma I (IT))
Isabella Garzia
(INFN)
