J/ψ Suppression in a Hadron and String Cascade Model

  • The proposed hadron and string cascade model, JPCIAE, for ultrarelativistic nucleus-nucleus collisions based on the LUND model and the PYTHIA event generator especially, is used to inveshgate the J/ψ suppression due to the nuclear absorption of a J/ψ in minimum bias pA and BA collisions at 200A GeV energy. With the different sets of reasonable formation bine for hadron and J/ψ the results of J/ψ suppression factor from both the usual scenario and the Glauber-like simulations are comparable with all the NA38 PA and BA data, except the NA50 data of Ph+Pb collisions. However, the difference between the usual scenario and the Glauber-like simulation, hence the difference betWeen the dynamical simulation and Glauber theory,can not be ignored. The sensitive effect of the hadron formation bine on the J/ψ suppression is studied in detail. The results seem to denote that for the J/ψ suppression the meson absorption plays a role in pA as well as in BA collisions.
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  • [1] MatSni T, Satz H. Phys. tett., l986, B178:416 2 NA3 Collab, Badier J et al. Z. Phys., 1983, C20:101 3 NA38 Collab, Baglin C et al. 1989, B220:470; 1990, B251:465, 472; 1991, B255:459; 1991, B270: 105;1995, B345: 617 4 NA50 Collab, Gonin M et al. Nucl. Phys., l996, A610:404c 5 Anderson R L et al. Phys. ffev. Lett., 1977, 38:2636 Gerschel C, Hufner J. Phys. Lett., 1988, B207:253 7 Gavin S, Vogt K Nul. Phys., 1990, B345: 104 8 Gerschel C, Hufner J. Nul. Phys., 1992, A544:513c9 Wong C Y. Phys. Rev. tett., 1996, 76:196 10 Blaizot J P, Ollitrault J Y. Phys. Rev. Lett., l996, 77; 170311 Kharzeev D. Nul. Phys., 1996, A610:418c 12 Wong C Y. Nu1. Phys., 1996, A610:434c 13 Gavin S, Vogt R Nul. Phys., l996, A610:442c14 Kharaeev D Nari M, Sats H. Phys. bett., 1997, B405: 14 15 GaVai R V, GuPta S. Phys. LetL, l997, B408:39716 Cassing W, Ko C M. Phys. Lett., 1997, B396:3917 Cassing W, Bratk0vskaya E L. Nucl. Phys., 1997, A623:570 18 Sjostrand T. C0mp. Phys. C0mmu., l994, 82:74 19 NA35 Collab, Alber T et al. Z. Phys., 1994, C64: 195 20 NA35 Collab, Bachler J et al. Phys. Rev. Lett, 1994, 72:1419 21 Cugnon J, Mizudri T, Vandermeulen J. Nucl. Phys., 1981, A352: 50522 Bertsch G F, Des GuPta S. Phys. ffep., 1988, 160:189 23 Sa Ben–dri, Tai An. Comp. Phys. Commu., 1995, 90: 121; ibid, 1999, 116:353 24 Lourenco C. Nul. Phys., 1996, A610;552c 25 Xinoshita K, Mnaka A, Sdriyoshi H. Pr0g. Theor. Phys.,1980, 63: 1268 26 Wong C Y, Lu Zhong–bo. Phys. ffev., 1989, D39:2606 27 Hwa R C, Flacutet J, Piacutet N. Phys. ffev., 1997, C56:432 28 Kharseev D Sats H. Phys. Lett., 1994, B334: 155 29 Wong C Y, Wong C W. Phys. Rev., 1998, D57: 1838
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Sa Benhao, Tai An, Wang Hui and Liu Fenghe. J/ψ Suppression in a Hadron and String Cascade Model[J]. Chinese Physics C, 1999, 23(5): 489-495.
Sa Benhao, Tai An, Wang Hui and Liu Fenghe. J/ψ Suppression in a Hadron and String Cascade Model[J]. Chinese Physics C, 1999, 23(5): 489-495. shu
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Received: 1998-04-13
Revised: 1900-01-01
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J/ψ Suppression in a Hadron and String Cascade Model

    Corresponding author: Sa Benhao,
  • China Institute of Atomic Energy, Beijing 1024131 Institute of High Energy Physics. The Chinese Academy of Sciences, Beijing 100039

Abstract: The proposed hadron and string cascade model, JPCIAE, for ultrarelativistic nucleus-nucleus collisions based on the LUND model and the PYTHIA event generator especially, is used to inveshgate the J/ψ suppression due to the nuclear absorption of a J/ψ in minimum bias pA and BA collisions at 200A GeV energy. With the different sets of reasonable formation bine for hadron and J/ψ the results of J/ψ suppression factor from both the usual scenario and the Glauber-like simulations are comparable with all the NA38 PA and BA data, except the NA50 data of Ph+Pb collisions. However, the difference between the usual scenario and the Glauber-like simulation, hence the difference betWeen the dynamical simulation and Glauber theory,can not be ignored. The sensitive effect of the hadron formation bine on the J/ψ suppression is studied in detail. The results seem to denote that for the J/ψ suppression the meson absorption plays a role in pA as well as in BA collisions.

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