Photoproduction of the Θ+ resonance on the nucleon in a Regge model
Creators
- 1. Jefferson Laboratory, Newport News, Virginia 23606 (United States) and Department of Physics, College of William and Mary, Williamsburg, Virginia 23187 (US)
- 2. Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum, D-44780 Bochum (Germany) and Petersburg Nuclear Physics Institute, 188350, Gatchina (Russian Federation)
- 3. Institut de Physique Nucleaire Orsay, F-91406 Orsay (France)
- 4. Department of Physics, College of William and Mary, Williamsburg, Virginia 23187 (United States)
Description
We estimate the reaction mechanisms for the photoproduction of the Θ+(1540) resonance on the nucleon, through K and K* Regge exchanges. We compare the size of the cross sections for the γn→K-Θ+ and γp→K0Θ+ reactions and investigate their sensitivity to the spin-parity assignments JP=(1/2)±,(3/2)± for the Θ+ resonance. The model allows one to estimate the cross sections corresponding with a given upper bound on the width of the Θ+. Within this model, the cross sections on the neutron are found to be around a factor of 5 larger than the ones on the proton, due to the presence of charged K exchange for the reaction on a neutron target. Furthermore, the photon asymmetry is found to display a pronounced sensitivity to the parity of the Θ+, making it a very promising observable to help determine the quantum numbers of the Θ+ resonance
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.72.054012;
- arXiv
- arXiv:hep-ph/0507180v2;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 72
- Journal Issue
- 5
- Journal Page Range
- p. 054012-054012.16
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37025818
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ASYMMETRY; COMPARATIVE EVALUATIONS; K*-892 MESONS; KAONS MINUS; KAONS NEUTRAL; NEUTRONS; NUCLEAR REACTION KINETICS; PARITY; PARTICLE WIDTHS; PHOTONS; PHOTOPRODUCTION; PROTONS; QUANTUM NUMBERS; REGGE CALCULUS; RESONANCE PARTICLES; SENSITIVITY; SPIN
- Descriptors DEC
- ANGULAR MOMENTUM; BARYONS; BASIC INTERACTIONS; BOSONS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; EVALUATION; FERMIONS; HADRONS; INTERACTIONS; KAONS; KINETICS; MASSLESS PARTICLES; MESONS; NUCLEONS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; REACTION KINETICS; STRANGE MESONS; STRANGE PARTICLES; VECTOR MESONS
Optional Information
- Notes
- (c) 2005 The American Physical Society