Production of heavy meson pairs in p collisions within a double handbag approach

FAIR NExt generation of ScientistS 2013

Goritschnig, A.T.^1 ; Pire, B.^2 ; Schweiger, W.^1

Institute of Physics, University of Graz, Universitätsplatz 5, 8010 Graz, Austria^1

Centre de Physique Theorique, Ecole Poly Technique, CNRS, 91128 Palaiseau cedex, France^2

关键词: Distribution amplitudes;    Matrix elements;    Pair production;    Perturbative QCD;    Proton-antiproton;    Robust modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/503/1/012012/pdf
DOI  :  10.1088/1742-6596/503/1/012012

来源: IOP

【 摘 要 】

We study the pair-production of heavy mesons in proton-antiproton annihilations within a perturbative QCD-motivated framework. In particular we investigate p → D0within a double handbag approach, where a hard subprocess factorizes from soft hadronic matrix elements. The soft matrix elements can be parametrized by transition distribution amplitudes, which are off-diagonal in flavor space. The transition distribution amplitudes are modelled as overlaps of light-cone wave functions. We obtain rather robust model results for p → D0cross sections, which are expected to be measured at the future detector at GSI-FAIR.