Diffractive photoproduction of psi(2S) mesons at HERA

Summary, in English

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.

• Author: C Adloff; V Andreev; B Andrieu; T Anthonis; A Astvatsatourov; A Babaev; J Bahr; P Baranov; E Barrelet; W Bartel; S Baumgartner; J Becker; M Beckingham; A Beglarian; O Behnke; C Beier; A Belousov; C Berger; T Berndt; JC Bizot; J Bohme; V Boudry; W Braunschweig; V Brisson; HB Broker; DP Brown; W Bruckner; D Bruncko; FW Busser; A Bunyatyan; A Burrage; G Buschhorn; L Bystritskaya; AJ Campbell; S Caron; F Cassol-Brunner; D Clarke; C Collard; JG Contreras; YR Coppens; JA Coughlan; MC Cousinou; BE Cox; G Cozzika; J Cvach; JB Dainton; WD Dau; K Daum; Mattias Davidsson; B Delcourt; N Delerue; R Demirchyan; A De Roeck; EA De Wolf; C Diaconu; J Dingfelder; P Dixon; V Dodonov; JD Dowell; A Droutskoi; A Dubak; C Duprel; G Eckerlin; D Eckstein; V Efremenko; S Egli; R Eichler; F Eisele; E Eisenhandler; M Ellerbrock; E Elsen; M Erdmann; W Erdmann; PJW Faulkner; L Favart; A Fedotov; R Felst; J Ferencei; S Ferron; M Fleischer; P Fleischmann; YH Fleming; G Flugge; A Fomenko; I Foresti; J Formanek; G Franke; G Frising; E Gabathuler; K Gabathuler; J Garvey; J Gassner; J Gayler; R Gerhards; C Gerlich; S Ghazaryan; L Goerlich; N Gogitidze; C Grab; V Grabski; H Grassler; T Greenshaw; G Grindhammer; T Hadig; D Haidt; L Hajduk; J Haller; WJ Haynes; B Heinemann; G Heinzelmann; RCW Henderson; S Hengstmann; H Henschel; R Heremans; G Herrera; I Herynek; M Hildebrandt; M Hilgers; KH Hiller; J Hladky; P Hoting; D Hoffmann; R Horisberger; A Hovhannisyan; S Hurling; M Ibbotson; C Issever; A Jacquet; M Jaffre; L Janauschek; X Janssen; V Jemanov; Leif Jönsson; C Johnson; DP Johnson; MAS Jones; Hannes Jung; D Kant; M Kapichine; Martin Karlsson; O Karschnick; F Keil; N Keller; J Kennedy; IR Kenyon; S Kermiche; C Kiesling; Pär Kjellberg; M Klein; C Kleinwort; T Kluge; G Knies; B Koblitz; SD Kolya; V Korbel; P Kostka; SK Kotelnikov; R Koutouev; A Koutov; J Kroseberg; K Kruger; T Kuhr; T Kurca; D Lamb; MPJ Landon; W Lange; T Lastovicka; P Laycock; E Lebailly; A Lebedev; B Leissner; R Lemrani; V Lendermann; S Levonian; Magnus Lindström; B List; E Lobodzinska; B Lobodzinski; A Loginov; N Loktionova; V Lubimov; S Luders; D Luke; L Lytkin; N Malden; E Malinovski; I Malinovski; S Mangano; R Maracek; P Marage; J Marks; R Marshall; HU Martyn; J Martyniak; SJ Maxfield; D Meer; A Mehta; K Meier; AB Meyer; H Meyer; J Meyer; PO Meyer; S Mikocki; D Milstead; S Mohrdieck; MN Mondragon; F Moreau; A Morozov; JV Morris; K Muller; P Murin; V Nagovizin; B Naroska; J Naumann; T Naumann; G Nellen; PR Newman; F Niebergall; C Niebuhr; O Nix; G Nowak; JE Olsson; D Ozerov; V Panassik; C Pascaud; GD Patel; M Peez; E Perez; A Petrukhin; JP Phillips; D Pitzl; R Poschl; I Potachnikova; B Povh; G Radel; J Rauschenberger; P Reimer; B Reisert; C Risler; E Rizvi; P Robmann; R Roosen; A Rostovtsev; S Rusakov; K Rybicki; DPC Sankey; S Schatzel; J Scheins; FP Schilling; P Schleper; D Schmidt; D Schmidt; S Schmidt; S Schmitt; M Schneider; L Schoeffel; A Schoning; T Schorner; V Schroder; HC Schultz-Coulon; C Schwanenberger; K Sedlak; F Sefkow; V Shekelyan; I Sheviakov; LN Shtarkov; Y Sirois; T Sloan; P Smirnov; Y Soloviev; D South; V Spaskov; A Specka; H Spitzer; R Stamen; B Stella; J Stiewe; I Strauch; U Straumann; M Swart; S Tchetchelnitski; G Thompson; PD Thompson; F Tomasz; D Traynor; P Truol; G Tsipolitis; I Tsurin; J Turnau; JE Turney; E Tzamariudaki; S Udluft; A Uraev; M Urban; A Usik; S Valkar; A Valkarova; C Vallee; P Van Mechelen; S Vassiliev; Y Vazdik; A Vest; A Vichnevski; K Wacker; J Wagner; R Wallny; B Waugh; G Weber; D Wegener; C Werner; N Werner; M Wessels; G White; S Wiesand; T Wilksen; M Winde; GG Winter; C Wissing; M Wobisch; EE Woehrling; E Wunsch; AC Wyatt; J Zacek; J Zalesak; Z Zhang; A Zhokin; F Zomer; M zur Nedden
• Department/s: Particle and nuclear physics; Chemical Physics
• Publishing year: 2002
• Language: English
• Pages: 251-264
• Publication/Series: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 541
• Issue: 3-4
• Links: http://dx.doi.org/10.1016/S0370-2693(02)02275-X
• Document type: Journal article
• Publisher: Elsevier
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0370-2693