Journalartikel
Resonance-parton duality in (e, e′π) off nucleons
Autorenliste: Kaskulov, Murat; Mosel, Ulrich
Jahr der Veröffentlichung: 2012
Seiten: 194-199
Zeitschrift: Progress in Particle and Nuclear Physics
Bandnummer: 67
Heftnummer: 2
ISSN: 0146-6410
Open Access Status: Green
DOI Link: https://doi.org/10.1016/j.ppnp.2011.12.017
Verlag: Elsevier
Abstract:
Regge-pole-based descriptions of pion-electroproduction on nucleons have given a very good description of the longitudinal components of the cross sections. However, these very same models grossly underestimate the transverse components. A related problem appears in QCD-based scaling arguments that predict the predominance of longitudinal over transverse electroproduction of pions by terms alpha Q(2). However, data from JLAB, Cornell, and DESY, covering a wide kinematical range 1 < Q(2) < 11 GeV2 and 2 GeV < W < 4 GeV, do not show this expected behavior. We address here this issue of the transverse response in pion-electroproduction by considering the contributions of high-lying (W > 2 GeV) nucleon resonances to pion production. The coupling strengths and form factors are obtained through resonance-parton duality. We show that in a wide range of electron energies and four-momentum transfers such a model describes all the available data very well. (C) 2012 Elsevier B.V. All rights reserved.
Zitierstile
Harvard-Zitierstil: Kaskulov, M. and Mosel, U. (2012) Resonance-parton duality in (e, e′π) off nucleons, Progress in Particle and Nuclear Physics, 67(2), pp. 194-199. https://doi.org/10.1016/j.ppnp.2011.12.017
APA-Zitierstil: Kaskulov, M., & Mosel, U. (2012). Resonance-parton duality in (e, e′π) off nucleons. Progress in Particle and Nuclear Physics. 67(2), 194-199. https://doi.org/10.1016/j.ppnp.2011.12.017
Schlagwörter
Deep exclusive pion electroproduction; HARD EXCLUSIVE ELECTROPRODUCTION; INELASTIC ELECTRON SCATTERING; MESONS; PION; Regge-pole model; Resonance-parton duality
