1 research outputs found
Non-Standard Time Reversal and Transverse Single-Spin Asymmetries
A system of quarks interacting with chiral fields is shown to provide a
physical realization of a "non-standard" time reversal for particle multiplets
which mixes the multiplet components. We argue that, if the internal structure
of the nucleon is governed by a chiral dynamics, the so-called T-odd quark
distribution functions are not forbidden by time-reversal invariance and hence
might be non vanishing. This agrees with some other recent results. From a
phenomenological point of view, this would give rise to single-spin asymmetries
in inclusive processes involving a transversely polarized nucleon: in
particular, in pion lepto- and hadro-production and in Drell-Yan processes