Abstract
Using the parton fusion model of perturbative QCD, we compute the production cross sections ofJ/ψ at largep T inpp,h(=π,p)A andAA collisions. The quark structure functions which we use are parametrised in a model-dependent manner to incorporate the well-known EMC-effect, whereas our nuclear gluon densities are as yet untested predictions of the model. Comparison of our computations withpp data and πA data suggests that in the respective kinematic ranges the perturbative QCD model works reasonably well and the predicted nuclear gluon density is a good description of the data. Having thus tested the ingredients of our computations, we compute the ratios ofJ/ψ production in the central regions ofAA,pA andpp as a function of thep T of theJ/ψ. Our results show a remarkable qualitative similarity to the proposed signature of the quark-gluon plasma, making its identification by this signature a fully quantitative task.
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References
J. Cleymans, R.V. Gavai, E. Suhonen: Phys. Rep. 130 (1986) 217
For a more detailed study of the physical degrees of freedom aboveT c see, for example: C. DeTar, J. Kogut: Phys. Rev. Lett. 59 (1987) 399; S. Gottlieb et al.: Phys. Rev. Lett. 59 (1987) 2247; R.V. Gavai, J. Potvin, S. Sanielevici: Phys. Rev. D40 (1989) 2743 and references therein
T. Matsui, H. Satz: Phys. Lett. B178 (1986) 416
F. Karsch, R. Petronzio: Phys. Lett. B193 (1987) 105; J. Blaizot, J.Y. Ollitrault: Phys. Lett. B199 (1987) 199; M.-C. Chu, T. Matsui: Phys. Rev. D37 (1988) 1851; F. Karsch, R. Petronzio: Z. Phys. C-Particles and Fields 37 (1988) 627; F. Karsch, R. Petronzio: Phys. Lett. B212 (1988) 253
A Bussiere et al.: Z. Phys. C-Particles and Fields 38 (1988) 117; L. Kluberg: Nucl. Phys. A488 (1988) 613c
S. Raha, B. Sinha: Phys. Lett. B198 (1987) 543; A. Capella et al.: Phys. Lett. B206 (1988) 354; C. Gerschel, J. Hüfner: Phys. Lett. B207 (1988) 194
J. Ftáĉnik et al.: Phys. Lett. B207, (1988) 194; S. Gavin et al.: Phys. Lett. B207 (1988) 257; R. Vogt. et al.: Phys. Lett B207 (1988) 263; J. Blaizot, J. Y. Ollitrault: Phys. Lett. B217 (1989) 386, 392
R.V. Gavai, S. Gupta: Phys. Lett. B216 (1989) 239
R.V. Gavai, S. Gupta, K. Sridhar: Phys. Lett. B227 (1989) 161; R.V. Gavai, S. Gupta, K. Sridhar: Nucl. Phys. A498 (1989) 483c
R.V. Gavai, S. Gupta: preprint BI-TP 89-21, CERN-TH.5469/89; preprint TIFR-TH 90-29, Proceedings of Quark Matter 90, Menton, France, J.P. Blaizot et al. (eds.): Nucl. Phys. A, in press
B.P. Renton: Proceedings of Topical Conference on Nuclear Chromodynamics, Argonne, USA, p. 242. J. Qui, D. Sivers (eds.), Singapore: World Scientific 1988
G. Martinelli, C.T. Sachrajda: Nucl. Phys. B306 (1988) 865
B.L. Combridge: Nucl. Phys. B151 (1979) 429
Z. Kunszt, E. Pietarinen: Nucl. Phys. B164 (1980) 45; R.K. Ellis, J.C. Sexton: Nucl. Phys. B282 (1987) 642
R. Windmolders: Proceedings of the XXIV International Conference on High Energy Physics (Munich). p. 267. R. Kothaus, J.H. Kühn (eds.). Berlin, Heidelberg, New York: Springer 1989
J.C. Collins, D.E. Soper, G. Sterman: Nucl. Phys. B263 (1986) 37
P. Nason, S. Dawson, R.K. Ellis: Nucl. Phys. B303 (1988) 607
G. Altarelli, M. Diemoz, G. Martinelli, P. Nason: Nucl. Phys. B 308 (1988) 724
E. Eichten, I. Hinchliffe, K. Lane, C. Quigg: Rev. Mod. Phys. 56 (1984) 579; erratum, Rev. Mod. Phys. 58 (1986) 1065
J.G.H. de Groot et al.: Z. Phys. C-Particles and Fields 17 (1983) 283
J. Badier et al.: Z. Phys. C-Particles and Fields 18 (1983) 281
S. Gupta, K.V.L. Sarma: Z. Phys. C-Particles and Fields 29 (1985) 329
J.J. Aubert et al.: Phys. Lett. B123 (1983) 275; R.G. Arnold et al.: Phys. Rev. Lett. 52 (1984) 727
T. Weiler: Phys. Rev. Lett. 44 (1980) 304; V. Barger, W.Y. Keung, R.J.N. Phillips: Phys. Lett. 91B (1981) 253
J. Badier et al.: Z. Phys. C-Particles and Fields 20 (1983) 101
M. Diemoz, F. Ferroni, E. Longo, G. Martinelli: Z. Phys. C-Particles and Fields 39 (1988) 27
Review of Particle Properties: Phys. Lett. B204 (1988) 1
S. Katsanevas et al.: Phys. Rev. Lett. 60 (1988) 2121
S. Kartik et al.: Phys. Rev. D41 (1990) 1
J.D. de Deus, M. Pimenta, J. Varela: Phys. Rev. D30 (1984) 697
R.M. Godbole, S. Gupta: Phys. Lett B228 (1989) 129
R. Baier, R. Rückl: Z. Phys. C-Particles and Fields 19 (1983) 251; Nucl. Phys. B210 (1982) 1
R.M. Godbole, K. Sridhar: preprint BU-TH/89-09
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Address after September 1, 1990: Theory Division, CERN, CH-1211 Geneva 23, Switzerland
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Gavai, R.V., Gupta, S. Hadroproduction ofJ/ψ at largep T and its relevance to a signal of quark gluon plasma. Z. Phys. C - Particles and Fields 49, 663–673 (1991). https://doi.org/10.1007/BF01483583
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DOI: https://doi.org/10.1007/BF01483583