Near-threshold production of φ mesons in pp collisions

被引：55

作者：

Hartmann, M.

Maeda, Y.

Keshelashvili, I.

Koch, H. R.

Mikirtytchiants, S.

Barsov, S.

Borgs, W.

Buescher, M.

Dimitrov, V. I.

Dymov, S.

Hejny, V.

Kleber, V.

Koptev, V.

Kulessa, P.

Mersmann, T.

Merzliakov, S.

Mussgiller, A.

Nekipelov, M.

Nioradze, M.

Ohm, H.

Pysz, K.

Schleichert, R.

Stein, H. J.

Stroeher, H.

Watzlawik, K. -H

Wuestner, P.

机构：

[1] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany

[2] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany

[3] Tbilisi State Univ, Inst High Energy Phys, GE-0186 Tbilisi, Georgia

[4] Petersburg Nucl Phys Inst, Dept High Energy Phys, Gatchina 188350, Russia

[5] Idaho Acceerator Ctr, Pocatello, ID 83209 USA

[6] Joint Inst Nucl Res, Lab Nucl Problems, Dubna 141980, Russia

[7] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[8] H Niewodniczanski Inst Nucl Phys PAN, PL-31342 Krakow, Poland

[9] Univ Munster, Inst Kernphys, D-48149 Munster, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.96.242301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The pp -> pp phi reaction has been studied at the Cooler Synchrotron COSY-Julich, 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.

引用

页数：4

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