Title
Diffractive photoproduction of J/ψ mesons with large momentum transfer at HERA
Date Issued
28 August 2003
Access level
open access
Resource Type
journal article
Author(s)
Aktas A.
Andreev V.
Anthonis T.
Astvatsatourov A.
Babaev A.
Backovic S.
Bähr J.
Baranov P.
Barrelet E.
Bartel W.
Baumgartner S.
Becker J.
Beckingham M.
Beglarian A.
Behnke O.
Behrendt O.
Belousov A.
Berger C.
Berndt T.
Bizot J.C.
Böhme J.
Boenig M.O.
Boudry V.
Bracinik J.
Braunschweig W.
Brisson V.
Bröker H.B.
Brown D.P.
Bruncko D.
Büsser F.W.
Bunyatyan A.
Burrage A.
Buschhorn G.
Bystritskaya L.
Campbell A.J.
Caron S.
Cassol-Brunner F.
Chekelian V.
Clarke D.
Collard C.
Contreras J.G.
Coppens Y.R.
Coughlan J.A.
Cousinou M.C.
Cox B.E.
Cozzika G.
Cvach J.
Dainton J.B.
Dau W.D.
Daum K.
Davidsson M.
Delcourt B.
Delerue N.
Demirchyan R.
de Roeck A.
de Wolf E.A.
Diaconu C.
Dingfelder J.
Dixon P.
Dodonov V.
Dowell J.D.
Dubak A.
Duprel C.
Eckerlin G.
Efremenko V.
Egli S.
Eichler R.
Eisele F.
Ellerbrock M.
Elsen E.
Erdmann M.
Erdmann W.
Faulkner P.J.W.
Favart L.
Fedotov A.
Felst R.
Ferencei J.
Ferron S.
Fleischer M.
Fleischmann P.
Fleming Y.H.
Flucke G.
Flügge G.
Fomenko A.
Foresti I.
Formánek J.
Franke G.
Frising G.
Gabathuler E.
Gabathuler K.
Garvey J.
Gassner J.
Gayler J.
Gerhards R.
Gerlich C.
Ghazaryan S.
Goerlich L.
Gogitidze N.
Gorbounov S.
Grab C.
Publisher(s)
Elsevier B.V.
Abstract
The diffractive photoproduction of J/ψ mesons is measured with the H1 detector at the ep collider HERA using an integrated luminosity of 78 pb -1. The differential cross section dσ(γp → J/ψY)/dt is studied in the range 2 < |t| < 30 GeV2, where t is the square of the four-momentum transferred at the proton vertex. The cross section is also presented as a function of the photon-proton centre-of-mass energy Wγp in three t intervals, spanning the range 50 < Wγp < 200 GeV. A fast rise of the cross section with Wγp is observed for each t range and the slope for the effective linear Pomeron trajectory is measured to be α′ = -0.0135 ± 0.0074(stat.) ± 0.0051(syst.) GeV-2. The measurements are compared with perturbative QCD models based on BFKL and DGLAP evolution. The data are found to be compatible with s-channel helicity conservation. © 2003 Published by Elsevier B.V.
Start page
205
End page
218
Volume
568
Issue
April 3
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Física nuclear
Scopus EID
2-s2.0-0042467747
Source
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ISSN of the container
03702693
Sources of information:
Directorio de Producción Científica
Scopus