Near-Threshold Production of {phi} Mesons in pp Collisions

Journal Article · Fri Jun 23 04:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.242301· OSTI ID:20775281

Hartmann, M; Koch, H R; Borgs, W; Buescher, M; Hejny, V; Mussgiller, A; Nekipelov, M; Ohm, H; Schleichert, R; Stein, H J; Stroeher, H; Watzlawik, K -H ^[1]; Maeda, Y ^[1]; Keshelashvili, I ^[1]; Mikirtytchiants, S; Barsov, S; Koptev, V ^[2]; Dimitrov, V I ^[3]; Dymov, S; Merzliakov, S ^[4]

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1. Institut fuer Kernphysik, Forschungszentrum Juelich, 52425 Juelich (Germany)
2. High Energy Physics Department, Petersburg Nuclear Physics Institute, 188350 Gatchina, Russia (Russian Federation)
3. Idaho Accelerator Center, Pocatello, Idaho 83209 (United States)
4. Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)

The pp{yields}pp{phi} reaction has been studied at the Cooler Synchrotron COSY-Juelich, using the internal beam and ANKE facility. Total cross sections have been determined at three excess energies {epsilon} near the production threshold. The differential cross section closest to threshold at {epsilon}=18.5 MeV exhibits a clear S wave dominance as well as a noticeable effect due to the proton-proton final-state interaction. Taken together with data for pp{omega} production, a significant enhancement of the {phi}/{omega} ratio of a factor 8 is found compared to predictions based on the Okubo-Zweig-Iizuka rule.

• OSTI ID: 20775281
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 96; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSY STORAGE RING
DIFFERENTIAL CROSS SECTIONS
FINAL-STATE INTERACTIONS
MEV RANGE 10-100
PARTICLE PRODUCTION
PHI-1020 MESONS
PROTON-PROTON INTERACTIONS
PROTONS
S WAVES
TOTAL CROSS SECTIONS