Inclusive J/psi and psi ' production in pi(-) -nucleus interactions at root s similar or equal to 26 GeV

Alexandrov, Y.; Angelini, C.; Barberis, D.; Ceradini, F.; Dameri, M.; Darbo, G.; Duane, A.; Flaminio, V.; Forino, A.; French, B. R.; Frenkel, A.; Gemme, C.; Harrison, K.; Hurst, R.; Lazzeroni, C.; Malferrari, L.; Martellotti, G.; Mazzanti, P.; Osculati, B.; Penso, Gianni; Rossi, L.; Verzocchi, M.; Websdale, D. M.; Zavertyaev, M.

doi:10.1016/s0550-3213(99)00412-5

Charmonium production by 350 GeV/c negative pions incident on tungsten, copper and silicon has been studied in the WA92 experiment. J/psi and psi' mesons are identified through their decays into muon pairs and are selected in the Feynman-x range x(F) > 0. Inclusive J/psi and psi' cross-sections and J/psi differential cross-sections as functions of x(F) and p(T)(2) are measured. Assuming the relation sigma = sigma(0) A(a) between the nuclear cross-section, sigma, and the atomic mass, A, of a target nucleus, a fit to J/psi data for different targets yields alpha = 0.87 +/- 0.05 +/- 0.04. Taking alpha = 0.87, the cross-sections per nucleon for J/psi and psi' are sigma(0)(J/psi) = 216 +/- 5 +/- 13 nb and sigma(0)(psi') = 28 +/- 8 +/- 11 nb, and their ratio is sigma(0)(psi') / sigma(0)(J/psi) = 0.13 +/- 0.05 +/- 0.01. The measurements of charmonium production are compared with results on open-charm production previously obtained in the same experiment. The ratio between the J/psi cross-section and the charmed-meson cross-section, relating to the same experimental conditions, is found to be sigma(0)(J/psi) /sigma(0)(D (D) over bar) = (1.75 +/- 0.05 +/- 0.15) x 10(-2). (C) 1999 Published by Elsevier Science B.V. All rights reserved.

Scheda prodotto non validato

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

Titolo:	Inclusive J/psi and psi ' production in pi(-) -nucleus interactions at root s similar or equal to 26 GeV
Autori:	Y. Alexandrov C. Angelini D. Barberis F. Ceradini M. Dameri G. Darbo A. Duane V. Flaminio A. Forino B. R. French A. Frenkel C. Gemme K. Harrison R. Hurst C. Lazzeroni L. Malferrari G. Martellotti P. Mazzanti B. Osculati PENSO, Gianni L. Rossi M. Verzocchi D. M. Websdale M. Zavertyaev mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1999
Rivista:	NUCLEAR PHYSICS. B
Handle:	http://hdl.handle.net/11573/407671
Appartiene alla tipologia:	01a Articolo in rivista

File allegati a questo prodotto

Non ci sono file associati a questo prodotto.

Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/11573/407671

Citazioni

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

CINECA IRIS Institutional Research Information System

Scheda prodotto non validato

File allegati a questo prodotto