INELASTIC J/PSI PRODUCTION IN DEEP INELASTIC-SCATTERING FROM HYDROGEN AND DEUTERIUM AND THE GLUON DISTRIBUTION OF FREE NUCLEONS

被引：61

作者：

Allasia, D ^{[1
]}

Amaudruz, P

Arneodo, M

Arvldson, A

Badelek, B

Baum, G

Beaufays, J

Bird, IG

Botje, M

Broggini, C

Bruckner, W

Brull, A

Burger, WJ

Ciborowski, J

Crittenden, R

van Dantzig, R

Dobbeling, H

Domingo, J

Drinkard, J

Dzierba, A

Engelien, H

Ferrero, MI

Fluri, L

Grafstrom, P

Hagberg, E

von Harrach, D

van der Heijden, M

Heusch, C

Ingram, Q

Jacholkowska, A

Janson, K

de Jong, M

Kabuss, EM

Kaiser, R

Ketel, TJ

Klein, F

Korzen, B

Kruner, U

Kullander, S

Landgraf, U

Lettenstrom, F

Lindqvist, T

Mallot, GK

Mariotti, C

van Middelkoop, G

Mizuno, Y

Nassalski, J

Nowotny, D

Pavel, N

Peschel, H

机构：

[1] Univ Turin, I-10125 Turin, ITALY

[2] Ist Nazl Fis Nucl, I-10125 Turin, ITALY

[3] Paul Scherrer Inst, CH-5234 Villigen, SWITZERLAND

[4] Univ Uppsala, S-75121 Uppsala, SWEDEN

[5] Univ Warsaw, PL-00681 Warsaw, POLAND

[6] Univ Bielefeld, D-4800 Bielefeld, GERMANY

[7] NIKHEF K, NL-1009 AJ Amsterdam, NETHERLANDS

[8] Max Planck Inst, D-6900 Heidelberg, GERMANY

[9] Univ Neuchatel, CH-2000 Neuchatel, SWITZERLAND

[10] Univ Freiburg, D-7800 Freiburg, GERMANY

[11] Indiana Univ, Bloomington, IN 47405 USA

[12] Univ California, Santa Cruz, CA 95064 USA

[13] Univ Mainz, D-6500 Mainz, GERMANY

[14] Univ Wuppertal, D-5600 Wuppertal, GERMANY

[15] CERN, CH-1211 Geneva 23, SWITZERLAND

[16] Inst Nucl Studies, PL-00681 Warsaw, POLAND

[17] Univ Heidelberg, D-6900 Heidelberg, GERMANY

[18] Univ Oxford, Oxford OXI3RH, ENGLAND

[19] Univ Etat Mons, B-7000 Mons, BELGIUM

来源：

PHYSICS LETTERS B | 1991年 / 258卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(91)91124-E

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results on inelastic J/PSI-production from muon interactions with hydrogen and deuterium at an incident muon energy of 280 GeV. The measured cross section ratio per nucleon for muon-induced J/PSI-production in deuterium and hydrogen was found to be R(D2/H2) = 1.01 +/- 0.15. The colour singlet model is shown to provide a good description of the observed differential cross section apart from a normalisation factor. The comparison between the observed cross section and the colour singlet model prediction allows the extraction of the gluon structure function G(chi) of the nucleon. The momentum fraction-chi of the nucleon carried by the gluon is measured in the range of chi = [0.02, 0.30]. The normalised gluon distribution of free nucleons thus found can be parametrised as chi-G(chi) = 1/2 (eta + 1)(1 - chi)eta, with eta = 5.1 +/- 0.9 (stat).

引用

页码：493 / 498

页数：6

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