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Titolo:
PHI-PHOTOPRODUCTION NEAR-THRESHOLD WITH OKUBO-ZWEIG-IIZUKA EVADING PHI-NN INTERACTIONS
Autore:
WILLIAMS RA;
Indirizzi:
HAMPTON UNIV,DEPT PHYS HAMPTON VA 23668 THOMAS JEFFERSON NATL ACCELERATOR FACIL NEWPORT NEWS VA 23606
Titolo Testata:
Physical review. C. Nuclear physics
fascicolo: 1, volume: 57, anno: 1998,
pagine: 223 - 232
SICI:
0556-2813(1998)57:1<223:PNWOEP>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
OMEGA-MESON PRODUCTION; OZI-RULE; INTERMEDIATE STATES; ANTIPROTON ANNIHILATION; KAON PHOTOPRODUCTION; STRANGENESS CONTENT; QUARK CONTENT; FORM-FACTOR; NUCLEON; PROTON;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
59
Recensione:
Indirizzi per estratti:
Citazione:
R.A. Williams, "PHI-PHOTOPRODUCTION NEAR-THRESHOLD WITH OKUBO-ZWEIG-IIZUKA EVADING PHI-NN INTERACTIONS", Physical review. C. Nuclear physics, 57(1), 1998, pp. 223-232

Abstract

Existing intermediate and high energy phi-photoproduction data is consistent with purely diffractive production (i.e., Pomeron exchange). However, near threshold (1.574 GeV < E-gamma(lab) less than or equal to2.0 GeV) the energy dependence of the diffractive amplitude is not well known and nondiffractive amplitudes such as pi(0) and eta exchange,<s(s)over bar> knockout, and nonzero phi NN couplings can give sizable contributions to the cross section and polarization density matrix elements of the phi-->K+K- 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-Lizuka violations.

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Documento generato il 06/07/20 alle ore 06:45:43