Published March 9, 2006
| Version v1
Journal article
Quark model description of quasi-elastic pion knockout from the proton at JLAB
- 1. Institute of Nuclear Physics, Moscow State University, Vorobievy Gory, Moscow 119899 (Russian Federation)
- 2. Institut fuer Theoretische Physik, Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)
Description
The interference term between s- and t-pole contributions to the p(e,e'π+)n cross section is evaluated on the basis of the constituent quark model. It is shown that the contribution of baryon s-poles can be modeled by a nonlocal extension of the Kroll-Ruderman contact term. This contribution is in a destructive interference with the pion t-pole that is essential to improve the description of recent JLab data at the invariant mass W=1.95 GeV. Some predictions are made for a new JLab measurement at higher values W=2.1-2.3 GeV and Q2 centered at 1.6 and 2.45 GeV2/c2
Additional details
Identifiers
- DOI
- 10.1016/j.physletb.2006.01.038;
- arXiv
- arXiv:hep-ph/0506319v3;
- PII
- S0370-2693(06)00096-7;
Publishing Information
- Journal Title
- Physics Letters. Section B
- Journal Volume
- 634
- Journal Issue
- 2-3
- Journal Page Range
- p. 220-226
- ISSN
- 0370-2693
- CODEN
- PYLBAJ
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38029029
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- CEBAF ACCELERATOR; CROSS SECTIONS; ELECTRON BEAMS; ELECTROPRODUCTION; FORM FACTORS; GEV RANGE 01-10; INTERFERENCE; KNOCK-OUT REACTIONS; MASS; NEUTRONS; PIONS PLUS; PROTON BEAMS; PROTONS; QUARK MODEL
- Descriptors DEC
- ACCELERATORS; BARYONS; BASIC INTERACTIONS; BEAMS; BOSONS; COMPOSITE MODELS; DIMENSIONLESS NUMBERS; DIRECT REACTIONS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; INTERACTIONS; LEPTON BEAMS; LINEAR ACCELERATORS; MATHEMATICAL MODELS; MESONS; NUCLEAR REACTIONS; NUCLEON BEAMS; NUCLEONS; PARTICLE BEAMS; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR MESONS
Optional Information
- Copyright
- Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.