Production of J/ψ and ψ(2S) mesons in π-Be collisions at 515 GeV/c

A. Gribushin, V. Abramov, Yu Antipov, B. Baldin, R. Crittenden, C. Davis, L. Dauwe, S. Denisov, A. Dyshkant, A. Dzierba, V. Glebov, H. Goldberg, R. Jesik, V. Koreshev, J. Krider, A. Krinitsyn, R. Li, S. Margulies, T. Marshall, J. MartinH. Mendez, A. Petrukhin, J. Solomon, V. Sirotenko, P. Smith, T. Sulanke, R. Sulyaev, F. Vaca, A. Ziemiński, Steven Roy Blusk, C. Bromberg, P. Chang, B. Choudhary, W. H. Chung, L. De Barbaro, W. Dlugosz, J. Dunlea, E. Engels, G. Fanourakis, G. Ginther, K. Hartman, J. Huston, V. Kapoor, C. Lirakis, S. Mani, J. Mansour, A. Maul, R. Miller, B. Y. Oh, E. Pothier, R. Roser, P. Shepard, D. Skow, P. Slattery, L. Sorrell, W. Toothacker, N. Varelas, D. Weerasundara, J. Whitmore, C. Yosef, M. Zieliński

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Abstract

We have studied the production of Jlψ and ψ(2S) charmonium mesons in 515 GeV/c π-Be collisions in the Feynman-x range 0.1<xF<0.8. J/ψ mesons were detected via their decay into μ+μ-, and ψ(2S) mesons were studied in both the μ+μ- and Jlψπ-π- decay modes. J/ψ differential cross sections have been measured as functions of xF,pT 2, and the cosine of the Gottfried-Jackson decay angle. We measure an inclusive Jlψ cross section of B(J/ψ→μ-μ-)σ(π -Be→J/ψ+X)/A= [9.3±0.1(stat)±1.1(syst)] nb/nucleon for JlψxF>0.1. Our results are compared with those from other experiments performed at lower beam energies. F We also measure the differential ψ(2S) cross section as a function of both xF and pr 2, and a ψ(2S) inclusive cross section of B(ψ(2S)→J/ψπ+π-)σ(π -Be→ψ(2S)+X)/A=[7.4±1.5(stat)±1.2(syst)] nb/nucleon for ψ(2S) xF>0.1. The fraction of the inclusive Jlψ yield due to ψ(2S) meson decays is 0.083±0.017(stat) ±0.013(syst), and the observed ratio of ψ(2S) decay rates is B(ψ(2S)→J/ψπ+π -)/B(ψ(2S)→μ+μ-) =30.2±7.2(stat)±6.8(syst). We have searched for production of "hidden" charm resonances decaying into either J/ψπ±,ψ(2S)π±, or J/ψπ- systems, and report an upper limit of 3.1 nb/nucleon for the product of branching ratio and cross section for the recently reported enhancement at a J/ψπ+π- mass of 3.836 GeV/ c2.

Original languageEnglish (US)
Pages (from-to)4723-4733
Number of pages11
JournalPhysical Review D
Volume53
Issue number9
StatePublished - May 1 1996
Externally publishedYes

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ASJC Scopus subject areas

  • Mathematical Physics
  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Gribushin, A., Abramov, V., Antipov, Y., Baldin, B., Crittenden, R., Davis, C., Dauwe, L., Denisov, S., Dyshkant, A., Dzierba, A., Glebov, V., Goldberg, H., Jesik, R., Koreshev, V., Krider, J., Krinitsyn, A., Li, R., Margulies, S., Marshall, T., ... Zieliński, M. (1996). Production of J/ψ and ψ(2S) mesons in π-Be collisions at 515 GeV/c. Physical Review D, 53(9), 4723-4733.