Proton-antiproton annihilation into a Lambda( )(c)(Lambda)over-bar(c)(-) pair

作者：Goritschnig A T^*; Kroll P; Schweiger W

来源：European Physical Journal A, 2009, 42(1): 43-62.

DOI：10.1140/epja/i2009-10862-x

The process p (p) over bar -> Lambda( )(c)(Lambda) over bar (-)(c) is investigated within the handbag approach. It is shown to lowest order of perturbative QCD that, under the assumption of restricted parton virtualities and transverse momenta, the dominant dynamical mechanism, characterized by the partonic subprocess u (u) over bar -> c (c) over bar, factorizes in the sense that only the subprocess contains highly virtual partons, namely a gluon, while the hadronic matrix elements embody only soft scales and can be parameterized in terms of helicity flip and non-flip generalized parton distributions. Modelling the latter functions by overlaps of light-cone wave functions for the involved baryons we are able to predict cross-sections and spin correlation parameters for the process of interest.

• 出版日期2009-10