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dc.contributor.author
H1 Collaboration
dc.contributor.author
Aaron, Francise D.
dc.contributor.author
Del Degan, Marc A.
dc.contributor.author
Egli, S.
dc.contributor.author
Grab, Christophorus
dc.contributor.author
Hildebrandt, Malte
dc.contributor.author
Horisberger, Roland
dc.contributor.author
Leibenguth, Guillaume
dc.contributor.author
Sauter, M.
dc.contributor.author
Zimmermann, T.
dc.contributor.author
et al.
dc.date.accessioned
2019-10-29T13:17:33Z
dc.date.available
2017-06-08T23:06:53Z
dc.date.available
2017-12-14T14:39:17Z
dc.date.available
2019-10-29T13:17:33Z
dc.date.issued
2010-05
dc.identifier.issn
1126-6708
dc.identifier.issn
1029-8479
dc.identifier.other
10.1007/JHEP05(2010)032
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/18637
dc.identifier.doi
10.3929/ethz-b-000018637
dc.description.abstract
Diffractive electroproduction of ρ and ϕ mesons is measured at HERA with the H1 detector in the elastic and proton dissociative channels. The data correspond to an integrated luminosity of 51 pb−1. About 10500 ρ and 2000 φ events are analysed in the kinematic range of squared photon virtuality 2.5 ≤ Q 2 ≤ 60 GeV2, photon-proton centre of mass energy 35 ≤ W ≤ 180 GeV and squared four-momentum transfer to the proton |t| ≤ 3 GeV2. The total, longitudinal and transverse cross sections are measured as a function of Q 2, W and |t|. The measurements show a transition to a dominantly “hard” behaviour, typical of high gluon densities and small qq¯¯ dipoles, for Q 2 larger than 10 to 20 GeV2. They support flavour independence of the diffractive exchange, expressed in terms of the scaling variable (Q 2+M 2 V )/4, and proton vertex factorisation. The spin density matrix elements are measured as a function of kinematic variables. The ratio of the longitudinal to transverse cross sections, the ratio of the helicity amplitudes and their relative phases are extracted. Several of these measurements have not been performed before and bring new information on the dynamics of diffraction in a QCD framework. The measurements are discussed in the context of models using generalised parton distributions or universal dipole cross sections.
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-nc/2.0/
dc.subject
Lepton-Nucleon Scattering
en_US
dc.title
Diffractive electroproduction of rho and phi mesons at HERA
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial 2.0 Generic
dc.date.published
2010-05-07
ethz.journal.title
Journal of High Energy Physics
ethz.journal.volume
2010
en_US
ethz.journal.issue
5
en_US
ethz.journal.abbreviated
JHEP
ethz.pages.start
32
en_US
ethz.size
111 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.publication.place
Berlin
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-08T23:07:07Z
ethz.source
ECIT
ethz.identifier.importid
imp59364c942d77968750
ethz.ecitpid
pub:30787
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-15T20:50:07Z
ethz.rosetta.lastUpdated
2019-10-29T13:17:46Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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