FIZIKA B 13 (2004)  1, 75 - 80

LETTER TO THE EDITOR

HARD EXCLUSIVE BARYON-ANTIBARYON PRODUCTION
IN 2-g COLLISIONS

CAROLA F. BERGER^a and WOLFGANG SCHWEIGER^b

^aI.N.F.N. Sezione di Torino, Via P. Giuria 1, I-10125 Torino, Italy
E-mail address: carola.berger@to.infn.it
^bInstitute of Theoretical Physics, University of Graz,
A-8010 Graz, Universitätsplatz 5, Austria
E-mail address: wolfgang.schweiger@uni-graz.at

Received 5 September 2003;    Accepted 26 April 2004
Online 16 July 2004

We present a perturbative calculation of baryon pair production in two-photon collisions, gg® BB, in which baryons are treated as quark-diquark systems. Our approach accounts for constituent mass effects in a systematic way. Taking the diquark-model parameters from foregoing studies of other electron- and photon-induced baryonic reactions, our results agree well with the most recent large momentum-transfer data for the pp, LL, and S⁰S⁰ channels.

PACS numbers: 12.38.Bx, 13.60.Rj
UDC 539.12.1

Keywords: perturbative QCD, diquarks, hard hadronic processes, 2-g reactions

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