Elastic photoproduction of J/ψ and γ mesons at HERA

被引：194

作者：

Adloff, C ^{[1
]}

Andreev, V

Andrieu, B

Arkadov, V

Astvatsatourov, A

Ayyaz, I

Babaev, A

Bähr, J

Baranov, P

Barrelet, E

Bartel, W

Bassler, U

Bate, P

Beglarian, A

Behnke, O

Beier, C

Belousov, A

Benisch, T

Berger, C

Bernardi, G

Berndt, T

Bizot, JC

Borras, K

Boudry, V

Braunschweig, W

Brisson, V

Bröker, HB

Brown, DP

Brückner, W

Bruel, P

Bruncko, D

Bürger, J

Büsser, FW

Bunyatyan, A

Burkhardt, H

Burrage, A

Buschhorn, G

Campbell, AJ

Cao, J

Carli, T

Caron, S

Chabert, E

Clarke, D

Clerbaux, B

Collard, C

Contreras, JG

Coughlan, JA

Cousinou, MC

Cox, BE

Cozzika, G

机构：

[1] Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany

[2] Inst Phys Nucl, Krakow, Poland

[3] Univ Dortmund, Inst Phys, Dortmund, Germany

[4] Joint Nucl Res Inst, Dubna, Russia

[5] CEA, DSM, DAPNIA, Gif Sur Yvette, France

[6] DESY, D-2000 Hamburg, Germany

[7] Univ Hamburg, Inst Expt Phys 2, Hamburg, Germany

[8] Univ Heidelberg, Inst Phys, D-6900 Heidelberg, Germany

[9] Univ Heidelberg, Kirchhoff Inst Phys, Heidelberg, Germany

[10] Univ Kiel, Inst Expt & Angew Phys, Kiel, Germany

[11] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

[12] Univ Lancaster, Sch Phys & Chem, Lancaster, England

[13] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[14] Univ London Queen Mary & Westfield Coll, London E1 4NS, England

[15] Univ Lund, Dept Phys, Lund, Sweden

[16] Univ Manchester, Dept Phys & Astron, Manchester, Lancs, England

[17] CNRS, IN2P3, CPPM, Marseille, France

[18] Inst Theoret & Expt Phys, Moscow, Russia

[19] PN Lebedev Phys Inst, Moscow 117924, Russia

[20] Max Planck Inst Phys, D-80805 Munich, Germany

[21] Univ Paris Sud, IN2P3, CNRS, LPNHE, Orsay, France

[22] Ecole Polytech, LPNHE, IN2P3, CNRS, Palaiseau, France

[23] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic

[24] Charles Univ, Fac Math & Phys, Prague, Czech Republic

[25] Univ Roma 3, Dipartimento Fis, Rome, Italy

[26] INFN Roma 1, Rome, Italy

[27] Yerevan Phys Inst, Yerevan 375036, Armenia

[28] DESY, Zeuthen, Germany

[29] ETH Zurich, Inst Teilchenphys, Zurich, Switzerland

[30] Univ Zurich, Inst Phys, Zurich, Switzerland

[31] Humboldt Univ, Inst Phys, Berlin, Germany

[32] Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany

[33] Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany

[34] Univ Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, England

[35] ULB VUB, Inter Univ Inst High Energies, Brussels, Belgium

[36] Univ Instelling Antwerp, B-2610 Wilrijk, Belgium

[37] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[38] CERN, Geneva, Switzerland

[39] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany

[40] Safarik Univ, Kosice, Slovakia

来源：

PHYSICS LETTERS B | 2000年 / 483卷 / 1-3期

关键词：

D O I：

10.1016/S0370-2693(00)00530-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Cross sections for elastic photoproduction of J/psi and Y mesons are presented. For J/psi mesons the dependence on the photon-proton centre-of-mass energy W-gamma p is analysed in an extended range with respect to previous measurements of 26 less than or equal to W-gamma p less than or equal to 2.85 GeV. The measured energy dependence is parameterized as sigma(gamma p) proportional to W-gamma p(delta) with delta = 0.83 +/- 0.07. The vp UP YP differential cross section d sigma/dt for J/psi mesons is derived, its dependence on W-gamma p and on t is analysed and the effective trajectory (in terms of Regge theory) is determined to be alpha(t) = (1.27 +/- 0.05) + (0.08 +/- 0.17) . t/GeV2. Models based on perturbative QCD and on pomeron exchange are compared to the data. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：23 / 35

页数：13

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