J/ψ and ψ′ production in p, O and S induced reactions at SPS energies

被引：68

作者：

Abreu, MC

Astruc, J

Baglin, C

Baldit, A

Bedjidian, M

Bordalo, P

Bohrani, A

Bussière, A

Busson, P

Castor, J

Chambon, T

Charlot, C

Chaurand, B

Chevrot, I

Contardo, D

Descroix, E

Devaux, A

Drapier, O

Espagnon, B

Fargeix, J

Ferreira, R

Fleuret, F

Force, P

Fredj, L

Gago, J

Gerschel, C

Corodetzky, P

Grossiord, JY

Guichard, A

Guillaud, J

Haroutunian, R

Jouan, D

Kluberg, L

Kossakowski, R

Landaud, G

Lourenço, C

Luquin, L

Mandry, R

Mourgues, S

Ohlsson-Malek, F

Papillon, S

Pizzi, JR

Racca, C

Ramos, S

Romana, A

Ronceux, B

Saturnini, P

Silva, S

Sonderegger, P

Tarrago, X

机构：

[1] LIP, P-1000 Lisbon, Portugal

[2] IPN, IN2P3, CNRS, F-91406 Orsay, France

[3] Univ Paris 11, F-91406 Orsay, France

[4] LAPP, IN2P3, CNRS, F-74941 Annecy Le Vieux, France

[5] LPC Clermont Ferrand, IN2P3, CNRS, F-63177 Clermont Ferrand, France

[6] Univ Clermont Ferrand, F-63177 Clermont Ferrand, France

[7] IPN Lyon, IN2P3, CNRS, F-69622 Villeurbanne, France

[8] Univ Lyon 1, F-69622 Villeurbanne, France

[9] Ecole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, France

[10] IRes, IN2P3, CNRS, F-67037 Strasbourg, France

[11] Univ Strasbourg, F-67037 Strasbourg, France

[12] CERN, CH-1211 Geneva 23, Switzerland

[13] Univ Algarve, Unidad Ciencias Exactas & Humanas, P-8000 Faro, Portugal

[14] Univ Tecn Lisboa, Inst Super Tecn, P-1096 Lisbon, Portugal

来源：

PHYSICS LETTERS B | 1999年 / 466卷 / 2-4期

关键词：

D O I：

10.1016/S0370-2693(99)01108-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The production of the J/psi and psi' charmonia states has been studied, through their dimuon decay, in proton, Oxygen and Sulphur induced reactions, by the NA38 experiment at the ERN SPS. The proton data was collected with beams of 200 and 450 GeV, while the ion beams had an energy of 200 GeV per incident nucleon. The J/psi production cross-section per nucleon-nucleon collision exhibits a remarkably continuous pattern, as a function of the product of the mass numbers of the interacting nuclei, from pp up to S-U reactions. The same pattern is observed within S-U collisions, as a function of the collision centrality. While in p-A interactions both charmonia states exhibit the same A-dependence, in S-U collisions the psi' production is very strongly suppressed. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：408 / 414

页数：7

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