Letter to the Editor

Diquarks as effective particles in hard exclusive scattering

Carola F Berger ; Institute of Theoretical Physics, University of Graz, Universitätsplatz 5, A-8010 Graz, AUSTRIA
Bernhard Lechner ; Institute of Theoretical Physics, University of Graz, Universitätsplatz 5, A-8010 Graz, AUSTRIA
Wolfgang Schweiger ; Institute of Theoretical Physics, University of Graz, Universitätsplatz 5, A-8010 Graz, AUSTRIA

Abstract

In the context of hard hadronic reactions, diquarks are a useful phenomenological device to model non-perturbative effects still observable in the kinematic range accessible by present-day experiments. In the following, we present diquark-model predictions for γγ → p¯p and ΛΛ. We also sketch how the (pure quark) hard-scattering formalism for exclusive reactions involving baryons can be reformulated in terms of quarks and diquarks. As an application of these considerations, we analyze the magnetic proton form factor with regard to its quark-diquark content.

Keywords

perturbative QCD; diquarks; hard hadronic processes; two-gamma reactions; proton magnetic form factor

Hrčak ID:

305362

URI

https://hrcak.srce.hr/305362

Publication date:

1.6.1999.

Article data in other languages: croatian

Visits: 445 *