CLAS Physics Database

E04-021

Spokesperson
M. Williams
Year
2004
Abstract
High-statistics differential cross sections and spin density matrix elements for the reaction γ p -> p ω have been measured using the CLAS at Jefferson Lab for center-of-mass (c.m.) energies from threshold up to 2.84 GeV. Results are reported in 112 10-MeV wide CM energy bins, each subdivided into cos(θCMω bins of width 0.1. These are the most precise and extensive ω photoproduction measurements to date. A number of prominent structures are clearly present in the data. Many of these have not previously been observed due to limited statistics in earlier measurements.
Publication
  1. M. Williams, D. Applegate, M. Bellis, C.A. Meyer, and CLAS Collaboration Differential cross sections and spin density matrix elements for the reaction γp -> pω. // Phys. Rev. C 80, 065208 (2009); arXiv:0908.2910v3 [nucl-ex]
Quantities
dσ/dcos(θ) ρ00,0 ρ01,0 ρ01,-1

Measurements

ID Quantity Beam Target Final state Q2min,
GeV2
Q2max,
GeV2
Wmin,
GeV
Wmax,
GeV
E133M1 dσ/dcos(θ) γ p ω p 0.0 0.0 1.725 2.835
E133M2 ρ00,0 γ p ω p 0.0 0.0 1.725 2.835
E133M3 ρ01,0 γ p ω p 0.0 0.0 1.725 2.835
E133M4 ρ01,-1 γ p ω p 0.0 0.0 1.725 2.835