Phi photoproduction near threshold with Okubo-Zweig-Iizuka evading phi NN interactions
Existing intermediate and high energy phi-photoproduction data is consistent with purely diffractive production (i.e., Pomeron exchange). However, near threshold (1.574 GeV < Egamma< 2.0 GeV) the energy dependence of the diffractive amplitude is not well known and nondiffractive amplitudes such as pi{sup 0} and eta exchange, ss-bar knockout, and nonzero phiNN couplings can give sizable contributions to the cross section and polarization density matrix elements of the phi-->K{sup +}K{sup -} decay angular distribution. We stress the importance of measurements with linearly polarized photons near the phi threshold to separate natural and unnatural parity exchange mechanisms. Approved and planned phi photoproduction and electroproduction experiments at Jefferson Lab will help establish the relative dynamical contributions near threshold and clarify outstanding theoretical issues related to apparent Okubo-Zweig-Iizuka violations.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 802135
- Report Number(s):
- JLAB-THY-97-51; DOE/ER/40150-2247; TRN: US0205693
- Journal Information:
- Physical Review C, Vol. 57; Other Information: Phys. Rev. C 57, 223 (1998); PBD: 1 Jan 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Study of the Okubo-Zweig-Iizuka--rule--violating reactions. pi. /sup +/n. -->. phip and. pi. /sup +/p. -->. phi. delta. /sup + +/ at 10 GeV/c
Test of the Okubo-Zweig-Iizuka rule in phi production