Photoproduction of phi Mesons with Linearly Polarized Photons
We propose to measure the reaction gamma(vec) + p --> p + phi with phi --> K^+K^- in the photon energy range of 1.9 < E_gamma < 2.2 GeV by tagging the incident photon energy and detecting the final-state proton in coincidence with the decay K^+ in the CLAS detector. The photons will be produced by coherent bremsstrahlung from a 4 GeV (6 GeV) electron beam incident on a diamond radiator, and will provide an average polarization of 65% (80%) The proposal to build the Coherent Bremsstrahlung Facility has been approved. The reaction can be completely specified by 12 complex density matrix elements composed of 17 independent, real functions of which 11 are measurable. The use of a linearly polarized beam of photons will allow for the extraction of nine of these functions by measuring the angular distributions of the decay kaons for each value of the 4-momentum transfer squared (t). The maximimum value of t is -2.0 (GeV/c)^2 and the experiment will obtain data with good statistics up to
- Research Organization:
- Thomas Jefferson Lab National Accelerator Facility
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 954610
- Report Number(s):
- JLAB-PR-98-109
- Country of Publication:
- United States
- Language:
- English
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