Dynamical coupled channels calculation of pion and omega meson production

Journal Article · Sun Feb 15 04:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.025208· OSTI ID:21199581

Paris, Mark W ^[1]

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1. Excited Baryon Analysis Center, Thomas Jefferson National Accelerator Facility, 12000 Jefferson Avenue MS12H2 Newport News, Virginia 23606 (United States)

The dynamical coupled-channels approach developed at the Excited Baryon Analysis Center is extended to include the {omega}N channel to study {pi}- and {omega}-meson production induced by scattering pions and photons from the proton. Six intermediate channels, including {pi}N, {eta}N, {pi}{delta}, {sigma}N, {rho}N, and {omega}N, are employed to describe unpolarized and polarized data. Bare parameters in an effective hadronic Lagrangian are determined in a fit to the data for {pi}N{yields}{pi}N, {gamma}N{yields}{pi}N, {pi}{sup -}p{yields}{omega}n, and {gamma}p{yields}{omega}p reactions at center-of-mass energies from threshold to W<2.0 GeV. The T matrix determined in these fits is used to calculate the photon beam asymmetry for {omega}-meson production and the {omega}N{yields}{omega}N total cross section and {omega}N-scattering lengths. The calculated beam asymmetry is in good agreement with the observed in the range of energies near threshold to W < or approx. 2.0 GeV.

• OSTI ID: 21199581
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
CENTER-OF-MASS SYSTEM
COUPLED CHANNEL THEORY
GEV RANGE 01-10
LAGRANGIAN FUNCTION
OMEGA BARYONS
PARTICLE PRODUCTION
PHOTON BEAMS
PHOTONS
PION-NUCLEON INTERACTIONS
PIONS MINUS
PROTONS
S MATRIX
SCATTERING
SCATTERING LENGTHS
SIMULATION
TOTAL CROSS SECTIONS