Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 박일흥 | - |
dc.date.accessioned | 2016-08-27T02:08:13Z | - |
dc.date.available | 2016-08-27T02:08:13Z | - |
dc.date.issued | 2004 | - |
dc.identifier.issn | 0550-3213 | - |
dc.identifier.other | OAK-2321 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/215839 | - |
dc.description.abstract | The exclusive electroproduction of J/psi mesons, ep --> epJ/psi, has been studied with the ZEUS detector at HERA for virtualities of the exchanged photon in the ranges 0.15 < Q(2) < 0.8 GeV2 and 2 < Q(2) < 100 GeV2 using integrated luminosities of 69 and 83 pb(-1), respectively. The photonproton centre-of-mass energy was in the range 30 < W < 220 GeV and the squared four-momentum transfer at the proton vertex \t\ < 1 GeV2. The cross sections and decay angular distributions are presented as functions of Q(2), W and t. The effective parameters of the pomeron trajectory are in agreement with those found in J/psi photoproduction. The spin-density matrix elements, calculated from the decay angular distributions, are consistent with the hypothesis of s-channel helicity conservation. The ratio of the longitudinal to transverse cross sections, sigma(L)/sigma(T), grows with Q(2), whilst no dependence on W or t is observed. The results are in agreement with perturbative QCD calculations and exhibit a strong sensitivity to the gluon distribution in the proton. (C) 2004 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.title | Exclusive electroproduction of J/psi mesons at HERA | - |
dc.type | Article | - |
dc.relation.issue | 1-2 | - |
dc.relation.volume | 695 | - |
dc.relation.index | SCI | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.startpage | 3 | - |
dc.relation.lastpage | 37 | - |
dc.relation.journaltitle | NUCLEAR PHYSICS B | - |
dc.identifier.doi | 10.1016/j.nuclphysb.2004.06.034 | - |
dc.identifier.wosid | WOS:000223495400001 | - |
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dc.contributor.scopusid | 박일흥(7403243322;57199842780) | - |
dc.date.modifydate | 20230616163100 | - |