Associated photoproduction of K{sup +} mesons off protons within a coupled-channels K-matrix approach

Journal Article · Thu Jan 14 23:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.015204· OSTI ID:21388861

Shyam, R ^[1]; Scholten, O ^[2]; Lenske, H ^[1]

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1. Institute fuer Theoretische Physik, Universitaet Giessen, D-35392 Giessen (Germany)
2. Kernfysisch Versneller Instituut, University of Groningen, NL-9747 AA Groningen (Netherlands)

We investigate the p(gamma,K{sup +})LAMBDA and p(gamma,K{sup +})SIGMA{sup 0} reactions within a coupled-channels effective-Lagrangian method that is based on the K-matrix approach. The two-body final channels included are piN, etaN, phiN, rhoN, gammaN, KLAMBDA, and KSIGMA. Nonresonant meson-baryon interactions are included in the model via nucleon intermediate states in the s and u channels and meson exchanges in the t-channel amplitude and the u-channel resonances. The nucleon resonances S{sub 11}(1535), S{sub 11}(1650), S{sub 31}(1620), P{sub 11}(1440), P{sub 11}(1710), P{sub 13}(1720), P{sub 33}(1232), P{sub 33}(1600), D{sub 13}(1520), D{sub 13}(1700), and D{sub 33}(1700) are included explicitly in the calculations. With a single parameter set that was derived earlier from our analysis of eta-meson photoproduction, the model describes all the available cross-section and polarization data of the SAPHIR Collaboration well for the two investigated channels. The description of the data from the CLAS Collaboration, however, is not of the same quality. In contrast to some previous studies, we do not find any compelling need to include a D{sub 13} state with a mass of about 2.0 GeV to reproduce the data for the p(gamma,K{sup +})LAMBDA reaction at photon energies corresponding to the invariant mass around 1.9 GeV.

• OSTI ID: 21388861
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BASIC INTERACTIONS
BOSON-EXCHANGE MODELS
BOSONS
CHARGED-PARTICLE REACTIONS
COUPLED CHANNEL THEORY
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
ETA MESONS
FERMIONS
FUNCTIONS
GAMMA RADIATION
GEV RANGE
GEV RANGE 01-10
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INTERACTIONS
INTERMEDIATE STATE
IONIZING RADIATIONS
K MATRIX
KAONS
KAONS PLUS
LAGRANGIAN FUNCTION
LAMBDA BARYONS
LAMBDA PARTICLES
MANY-BODY PROBLEM
MASS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATRICES
MESON-BARYON INTERACTIONS
MESONS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PERIPHERAL MODELS
PHOTONS
PHOTOPRODUCTION
POLARIZATION
PROTONS
PSEUDOSCALAR MESONS
RADIATIONS
RESONANCE
SIGMA BARYONS
SIGMA NEUTRAL PARTICLES
SIGMA PARTICLES
STRANGE MESONS
STRANGE PARTICLES
T CHANNEL
TWO-BODY PROBLEM
U CHANNEL