THE NEAR-THRESHOLD PRODUCTION OF ϕ-MESONS IN PROTON–NUCLEON COLLISIONS-Reference-Cited by-同舟云学术

THE NEAR-THRESHOLD PRODUCTION OF ϕ-MESONS IN PROTON–NUCLEON COLLISIONS

Published:2007-01-30 Issue:02n03 Volume:22 Page:317-324
ISSN:0217-751X
Container-title:International Journal of Modern Physics A
language:en
Short-container-title:Int. J. Mod. Phys. A

Author:

,Hartmann M.¹,Maeda Y.¹²,Keshelashvili I.¹³,Barsov S.⁴,Borgs W.¹,Büscher M.¹,Dimitrov V. I.⁵,Dymov S.⁶,Dzyuba A.¹⁴,Hejny V.¹,Kacharava A.³⁷,Kleber V.⁸,Koch H. R.¹,Koptev V.⁴,Kulessa P.¹⁹,Mersmann T.¹⁰,Merzliakov S.⁷,Mikirtytchiants S.⁴,Mussgiller A.¹⁵,Nekipelov M.¹,Nioradze M.³,Ohm H.¹,Pysz K.⁹,Schleichert R.¹,Stein H. J.¹,Ströher H.¹,Valdau Yu.⁴,Watzlawik K.-H.¹,Wilkin C.¹¹,Wüstner P.¹²

Affiliation:

1. Institut für Kernphysik, Forschungszentrum Jülich, 52425 Jülich, Germany

2. Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany

3. High Energy Physics Institute, Tbilisi State University, 0186 Tbilisi, Georgia

4. High Energy Physics Department, Petersburg Nuclear Physics Institute, 188350 Gatchina, Russia

5. Idaho Accelerator Center, Pocatello, Idaho 83209, USA

6. Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, 141980 Dubna, Russia

7. Physikalisches Institut II, Universität Erlangen–Nürnberg, 91058 Erlangen, Germany

8. Physikalisches Institut, Universität Bonn, 53115 Bonn, Germany

9. H. Niewodniczański Institute of Nuclear Physics PAN, 31342 Kraków, Poland

10. Institut für Kernphysik, Universität Münster, 48149 Münster, Germany

11. Physics and Astronomy Department, UCL, Gower Street, London WC1E 6BT, UK

12. Zentralinstitut für Elektronik, Forschungszentrum Jülich, 52425 Jülich, Germany

Abstract

The pp → ppϕ and quasi–free pn → dϕ reactions have been studied at the Cooler Synchrotron COSY–Jülich, using the internal beam and the ANKE facility. Total cross sections in the pp entrance channel have been determined at three excess energies ∊ in the range of 18.5–75.9 MeV. In case of the pn entrance channel the energy dependence of the cross section up to 80 MeV has been extracted by exploiting the intrinsic momentum of the neutron inside a deuterium target. Taken together with data for ω–production, a significant enhancement of the ϕ/ω ratio for both entrance channels of a factor 8 is found compared to predictions based on the Okubo–Zweig–Iizuka rule.

Publisher

World Scientific Pub Co Pte Lt

Subject

Astronomy and Astrophysics,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217751X07035483

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