Elsevier

Physics Letters B

Volume 267, Issue 2, 12 September 1991, Pages 299-308
Physics Letters B

φ production in pp annihilation at rest

https://doi.org/10.1016/0370-2693(91)91264-VGet rights and content

Abstract

We report on measurements of the branching ratios for φ production in pp annihilation at rest in H2 gas. Branching ratios for φπ0, φη, φϱ0, φω and φπ+ π are determined for two data sets with different contributions of annihilations from S and P states of the pp system. The branching ratios are compared to corresponding annihilation modes where the φ is replaced by an ω meson. We conclude that φ production is in most reactions enhanced with respect to the expectation based on the OZI rule. In annihilations from the spin triplet ground state of antiprotonic hydrogen into φπ the OZI rule is violated dramatically.

References (37)

  • A.M. Cooper

    Nucl. Phys. B

    (1978)
  • A. Etkin

    Phys. Lett. B

    (1988)
  • H. Abramowicz

    Z. Phys. C

    (1982)
  • J. Gasser et al.

    Phys. Rep. C

    (1982)
  • L.A. Ahrens

    Phys. Rev. D

    (1986)
    L.A. Ahrens

    Phys. Rev. D

    (1987)
  • J. Ashman

    Phys. Lett. B

    (1988)

    Nucl. Phys. B

    (1989)
  • S. Furui

    Z. Phys. C

    (1990)

    Nucl. Phys. A

    (1990)
  • S. Ahmad

    Nucl. Instrum. Methods A

    (1990)
  • U. Schaefer

    Nucl. Phys. A

    (1989)
  • K.D. Duch

    Z. Phys. C

    (1989)
  • C. Gesquière
  • P. Weidenauer et al., NN annihilations into five pions, in...P. Weidenauer

    Ph.D. Thesis

    (1990)
  • M. Doser

    Nucl. Phys. A

    (1988)

    Phys. Lett. B

    (1988)
    G. Reifenröther et al.

    Phys. Lett. B

    (1990)
  • M. Chiba

    Phys. Rev. D

    (1988)
  • M. Bloch et al.

    Nucl. Phys. B

    (1970)
  • F.E. Close et al.

    Phys. Rev. Lett.

    (1978)

    Phys. Lett. B

    (1987)
  • C.B. Dover et al.

    Phys. Rev. Lett.

    (1989)
  • J. Ellis et al.

    Phys. Lett. B

    (1989)
  • Cited by (0)

    We thank the LEAR crew for their support during the runs. This research was supported in part by the Deutsches Bundesministerium für Forschung und Technologie, the Institut National de Physique Nucléaire des Particules, the Schweizer Nationalfonds, the Osterreichischer Nationalfonds and the Natural Sciences and Engineering Research Council of Canada.

    1

    The analysis presented here is part of the Ph.D. thesis of J. Reifenröther.

    2

    Present address: Schott Glaswerke, W-6500 Mainz/Wiesbaden, FRG.

    3

    Present address: LeCroy Research Systems, CH-1211 Geneva, Switzerland.

    4

    Present address: CERN, CH-1211 Geneva, Switzerland.

    5

    Present address: IMP-ETH, CH-5234 Villigen, PSI, Switzerland.

    View full text