Diffractive photoproduction of ψ(2S) mesons at HERA

被引:90
作者
Adloff, C [1 ]
Andreev, V
Andrieu, B
Anthonis, T
Astvatsatourov, A
Babaev, A
Bähr, J
Baranov, P
Barrelet, E
Bartel, W
Baumgartner, S
Becker, J
Beckingham, M
Beglarian, A
Behnke, O
Beier, C
Belousov, A
Berger, C
Berndt, T
Bizot, JC
Böhme, J
Boudry, V
Braunschweig, W
Brisson, V
Bröker, HB
Brown, DP
Brückner, W
Bruncko, D
Büsser, FW
Bunyatyan, A
Burrage, A
Buschhorn, G
Bystritskaya, L
Campbell, AJ
Caron, S
Cassol-Brunner, F
Clarke, D
Collard, C
Contreras, JG
Coppens, YR
Coughlan, JA
Cousinou, MC
Cox, BE
Cozzika, G
Cvach, J
Dainton, JB
Dau, WD
Daum, K
Davidsson, M
Delcourt, B
机构
[1] Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany
[2] Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany
[3] Univ Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, England
[4] VUB, ULB, Interuniv Inst High Energies, Brussels, Belgium
[5] Univ Antwerp, B-2020 Antwerp, Belgium
[6] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[7] Inst Nucl Phys, Krakow, Poland
[8] Univ Dortmund, Inst Phys, D-4600 Dortmund, Germany
[9] Joint Inst Nucl Res, Dubna, Russia
[10] CEA, DSM, DAPNIA, CE Saclay, Gif Sur Yvette, France
[11] DESY, D-2000 Hamburg, Germany
[12] Univ Hamburg, Inst Expt Phys, Hamburg, Germany
[13] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany
[14] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany
[15] Heidelberg Univ, Kirchhoff Inst Phys, Heidelberg, Germany
[16] Univ Kiel, Inst Expt & Angew Phys, Kiel, Germany
[17] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia
[18] Univ Lancaster, Sch Phys & Chem, Lancaster, England
[19] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England
[20] Queen Mary Univ London, London E1 4NS, England
[21] Lund Univ, Dept Phys, Lund, Sweden
[22] Univ Manchester, Dept Phys, Manchester M13 9PL, Lancs, England
[23] Univ Mediterranee, CPPM, CNRS, IN2P3, Marseille, France
[24] Inst Theoret & Expt Phys, Moscow 117259, Russia
[25] PN Lebedev Phys Inst, Moscow 117924, Russia
[26] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[27] Univ Paris 11, LAL, IN2P3, CNRS, Orsay, France
[28] Ecole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, France
[29] Univ Paris 06, LPNHE, Paris, France
[30] Univ Paris 07, CNRS, IN2P3, Paris, France
[31] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic
[32] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic
[33] Univ Roma Tre, Dipartimento Fis, Rome, Italy
[34] INFN Roma 3, Rome, Italy
[35] Paul Scherrer Inst, Villigen, Switzerland
[36] Berg Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany
[37] Yerevan Phys Inst, Yerevan 375036, Armenia
[38] DESY, Zeuthen, Germany
[39] Swiss Fed Inst Technol, Inst Teilchenphys, Zurich, Switzerland
[40] Univ Zurich, Inst Phys, Zurich, Switzerland
[41] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece
[42] Berg Univ Wuppertal, Inst Expt Kernphys, Wuppertal, Germany
[43] CINVESTAV, Dept Fis Ap, Merida, Yucatan, Mexico
[44] Univ PJ Safarik, Kosice, Slovakia
[45] CERN, Geneva, Switzerland
[46] CINVESTAV, Dept Fis, Mexico City 14000, DF, Mexico
关键词
D O I
10.1016/S0370-2693(02)02275-X
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Results on diffractive photoproduction of psi(2S) mesons are presented using data collected between 1996 and 2000 with the H1 detector at the HERA ep collider. The data correspond to an integrated luminosity of 77 pb(-1). The energy dependence of the diffractive psi(2S) cross section is found to be similar to or possibly somewhat steeper than that for J/psi mesons. The dependences of the elastic and proton dissociative psi(2S) photoproduction cross sections on the squared momentum transfer t at the proton vertex are measured. The t-dependence of the elastic channel, parametrised as e(bt), yields b(el)(psi(2S)) = (4.31 +/- 0.57 +/- 0.46) GeV-2, compatible with that of the J/psi. For the proton dissociative channel the result b(pd)(psi(2S)) = (0.59 +/- 0.13 +/- 0.12) GeV-2 is 2.3 standard deviations smaller than that measured for the J/psi. With proper account of the individual wavefunctions theoretical predictions based on perturbative QCD are found to describe the measurements well. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:251 / 264
页数:14
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