We have measured the production cross-section times branching ratio for J/ψ→μ+μ- in pp̄ interactions at √s=630 GeV in the kinematic range |y| <2.0 and pT> 5 GeV/c, BR(J/ψ→μ+μ -)σ(pp̄→J/ψ)=6.18±0.24±0.81 nb. The data sample collected in 1988 and 1989 for an integrated luminosity of 4.7 pb-1 represents a fivefold improvement over the statistics in our earlier study of the J/ψ production process, and the pT distribution which is measured extends to 28 GeV/c. Using event topology we show that the rate for the direct production of J/ψ, via radiative decays of χ states, is larger than that for production via B-hadrons. Production of ψ′ is also studied using the decay modes ψ′→μ+μ- and ψ′→J/ψπ+π-.

J/ψ and ψ′ production at the CERN p̄p collider / C., A., M. G., A., O. C., A., K., A., R., A., B., A., C., B., S., B., G., B., A., B., A., B., P., B., H., B., A., B., R., B., K., B., M., B., D., B., C., B., B., B., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 256:1(1991), pp. 112-120. [10.1016/0370-2693(91)90227-h]

J/ψ and ψ′ production at the CERN p̄p collider

LACAVA, Francesco;
1991

Abstract

We have measured the production cross-section times branching ratio for J/ψ→μ+μ- in pp̄ interactions at √s=630 GeV in the kinematic range |y| <2.0 and pT> 5 GeV/c, BR(J/ψ→μ+μ -)σ(pp̄→J/ψ)=6.18±0.24±0.81 nb. The data sample collected in 1988 and 1989 for an integrated luminosity of 4.7 pb-1 represents a fivefold improvement over the statistics in our earlier study of the J/ψ production process, and the pT distribution which is measured extends to 28 GeV/c. Using event topology we show that the rate for the direct production of J/ψ, via radiative decays of χ states, is larger than that for production via B-hadrons. Production of ψ′ is also studied using the decay modes ψ′→μ+μ- and ψ′→J/ψπ+π-.
1991
01 Pubblicazione su rivista::01a Articolo in rivista
J/ψ and ψ′ production at the CERN p̄p collider / C., A., M. G., A., O. C., A., K., A., R., A., B., A., C., B., S., B., G., B., A., B., A., B., P., B., H., B., A., B., R., B., K., B., M., B., D., B., C., B., B., B., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 256:1(1991), pp. 112-120. [10.1016/0370-2693(91)90227-h]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/486455
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 72
  • ???jsp.display-item.citation.isi??? 65
social impact