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dc.contributor.author
H1 Collaboration
dc.contributor.author
Aktas, A.
dc.contributor.author
Baumgartner, Simon
dc.contributor.author
Berger, Niklaus
dc.contributor.author
Del Degan, Marc A.
dc.contributor.author
Erdmann, Wolfram
dc.contributor.author
Grab, Christoph
dc.contributor.author
Leibenguth, Guillaume
dc.contributor.author
List, Benno
dc.contributor.author
Mangano, Salvatore
dc.contributor.author
Meer, David
dc.contributor.author
Schöning, André
dc.contributor.author
Weber, R.
dc.contributor.author
Zimmermann, Tobias
dc.contributor.author
et al.
dc.date.accessioned
2019-04-30T10:26:12Z
dc.date.available
2017-06-09T11:21:24Z
dc.date.available
2018-03-20T11:11:40Z
dc.date.available
2019-04-15T09:49:11Z
dc.date.available
2019-04-30T10:26:12Z
dc.date.issued
2006-06
dc.identifier.issn
1434-6044
dc.identifier.issn
1434-6052
dc.identifier.other
10.1140/epjc/s2006-02519-5
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/35766
dc.identifier.doi
10.3929/ethz-b-000035766
dc.description.abstract
Cross sections for elastic production of J/ψ mesons in photoproduction and electroproduction are measured in electron proton collisions at HERA using an integrated luminosity of 55 pb-1. Results are presented for photon virtualities Q2 up to 80 GeV2. The dependence on the photon-proton centre of mass energy Wγp is analysed in the range 40≤Wγp≤305 GeV in photoproduction and 40≤Wγp≤160 GeV in electroproduction. The Wγp dependences of the cross sections do not change significantly with Q2 and can be described by models based on perturbative QCD. Within such models, the data show a high sensitivity to the gluon density of the proton in the domain of low Bjorken x and low Q2. Differential cross sections dσ/dt, where t is the squared four-momentum transfer at the proton vertex, are measured in the range |t|<1.2 GeV2 as functions of Wγp and Q2. Effective Pomeron trajectories are determined for photoproduction and electroproduction. The J/ψ production and decay angular distributions are consistent with s-channel helicity conservation. The ratio of the cross sections for longitudinally and transversely polarised photons is measured as a function of Q2 and is found to be described by perturbative QCD based models.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Elastic J/ψ production at HERA
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2006-04-27
ethz.journal.title
The European Physical Journal C
ethz.journal.volume
46
en_US
ethz.journal.issue
3
en_US
ethz.journal.abbreviated
Eur. Phys. J. C
ethz.pages.start
585
en_US
ethz.pages.end
603
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
001879220
ethz.publication.place
Heidelberg
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-09T11:21:31Z
ethz.source
ECIT
ethz.identifier.importid
imp59364e186cb1b54243
ethz.ecitpid
pub:57209
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-12T18:00:10Z
ethz.rosetta.lastUpdated
2019-04-30T10:26:20Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.atitle=Elastic%20J/%CF%88%20production%20at%20HERA&amp;rft.jtitle=The%20European%20Physical%20Journal%20C&amp;rft.date=2006-06&amp;rft.volume=46&amp;rft.issue=3&amp;rft.spage=585&amp;rft.epage=603&amp;rft.issn=1434-6044&amp;1434-6052&amp;rft.au=H1%20Collaboration&amp;Aktas,%20A.&amp;Baumgartner,%20Simon&amp;Berger,%20Niklaus&amp;Del%20Degan,%20Marc%20A.&amp;rft.genre=article&amp;
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