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A study of π andK production in proton-uranium and oxygen-uranium interactions at 22 GeV/A using decay muons |
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| Authors: | M. C. Abreu M. Alimi C. Baglin A. Baldit G. P. Barreira M. Bedjidian P. Bordalo S. Borenstein J. Britz A. Bussiere P. Busson A. Casaca R. Cases J. Castor C. Charlot B. Chaurand D. Contardo E. Descroix A. Devaux J. Fargeix X. Felgeyrolles P. Force L. Fredj J. M. Gago C. Gerschel P. Gomes P. Gorodetzky J. Y. Grossiord A. Guichard J. P. Guillaud R. Haroutunian L. Kluberg L. Kraus G. Landaud I. Linck C. Louren?o A. Maio L. Peralta M. Pimenta J. R. Pizzi C. Racca S. Ramos A. Romana R. Salmeron A. Sinquin P. Sonderegger J. Varela NA Collaboration |
| Affiliation: | 1. LIP, P-1699, Lisboa, Portugal 2. IPNL, Univ. de Lyon and CNRS-IN2P3, F-69622, Villeurbanne, France 3. LAPP, CNRS-IN2P3, F-74019, Annecy-Le Vieux, France 4. LPC, Université de Clermont-Ferrand and CNRS-INP2P3, F-63170, Aubière, France 5. LPNHE, Ecole Polytechnique and CNRS-IN2P3, F-91128, Palaiseau, France 6. CRN, CNRS-IN2P3 and Univ. Louis Pasteur, F-67037, Strasbourg, France 7. IFIC, E-46100, Bourjasot, Valencia, Spain 8. IPN, Univ. de Paris-Sud and CNRS-IN2P3, F-91406, Orsay, France 9. CERN, CH-1211, Geneva 23, Switzerland |
| Abstract: | The like-sign dimuons copiously recorded in the NA 38 experiment both inp-U and O?U reactions at 200 GeV/nucleon are interpreted as resulting from decays of π andK mesons in comparable proportions. The ++/?? ratio is large (?1.7) and ascribed to theK + being more copiously produced than theK ?. Both the average transverse momentum and the ++/?? ratio are comparable forp-U and O?U reactions, and both increase only slightly with the transverse energyE T . |
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