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Leif Jönsson

Leif Jönsson

Professor emeritus

Leif Jönsson

Diffractive electroproduction of rho and phi mesons at HERA

Author

  • F. D. Aaron
  • M. Aldaya Martin
  • C. Alexa
  • V. Andreev
  • B. Antunovic
  • A. Asmone
  • S. Backovic
  • A. Baghdasaryan
  • E. Barrelet
  • W. Bartel
  • K. Begzsuren
  • A. Belousov
  • J. C. Bizot
  • V. Boudry
  • I. Bozovic-Jelisavcic
  • J. Bracinik
  • G. Brandt
  • M. Brinkmann
  • V. Brisson
  • D. Bruncko
  • A. Bunyatyan
  • G. Buschhorn
  • L. Bystritskaya
  • A. J. Campbell
  • K. B. Cantun Avila
  • F. Cassol-Brunner
  • K. Cerny
  • V. Cerny
  • V. Chekelian
  • A. Cholewa
  • J. G. Contreras
  • J. A. Coughlan
  • G. Cozzika
  • J. Cvach
  • J. B. Dainton
  • K. Daum
  • M. Deak
  • Y. de Boer
  • B. Delcourt
  • M. Del Degan
  • J. Delvax
  • E. A. De Wolf
  • C. Diaconu
  • V. Dodonov
  • A. Dossanov
  • A. Dubak
  • G. Eckerlin
  • V. Efremenko
  • S. Egli
  • A. Eliseev
  • E. Elsen
  • A. Falkiewicz
  • L. Favart
  • A. Fedotov
  • R. Felst
  • J. Feltesse
  • J. Ferencei
  • D. -J. Fischer
  • M. Fleischer
  • A. Fomenko
  • E. Gabathuler
  • J. Gayler
  • S. Ghazaryan
  • A. Glazov
  • I. Glushkov
  • L. Goerlich
  • N. Gogitidze
  • M. Gouzevitch
  • C. Grab
  • T. Greenshaw
  • B. R. Grell
  • G. Grindhammer
  • S. Habib
  • D. Haidt
  • C. Helebrant
  • R. C. W. Henderson
  • E. Hennekemper
  • H. Henschel
  • M. Herbst
  • G. Herrera
  • M. Hildebrandt
  • K. H. Hiller
  • D. Hoffmann
  • R. Horisberger
  • T. Hreus
  • M. Jacquet
  • M. E. Janssen
  • X. Janssen
  • Leif Jönsson
  • A. W. Jung
  • H. Jung
  • M. Kapichine
  • J. Katzy
  • I. R. Kenyon
  • C. Kiesling
  • M. Klein
  • C. Kleinwort
  • T. Kluge
  • A. Knutsson
  • R. Kogler
  • P. Kostka
  • M. Kraemer
  • K. Krastev
  • J. Kretzschmar
  • A. Kropivnitskaya
  • K. Krueger
  • K. Kutak
  • M. P. J. Landon
  • W. Lange
  • G. Lastovicka-Medin
  • P. Laycock
  • A. Lebedev
  • G. Leibenguth
  • V. Lendermann
  • S. Levonian
  • G. Li
  • K. Lipka
  • A. Liptaj
  • B. List
  • J. List
  • N. Loktionova
  • R. Lopez-Fernandez
  • V. Lubimov
  • L. Lytkin
  • A. Makankine
  • E. Malinovski
  • P. Marage
  • Ll. Marti
  • H. -U. Martyn
  • S. J. Maxfield
  • A. Mehta
  • A. B. Meyer
  • H. Meyer
  • H. Meyer
  • J. Meyer
  • V. Michels
  • S. Mikocki
  • I. Milcewicz-Mika
  • F. Moreau
  • A. Morozov
  • J. V. Morris
  • M. U. Mozer
  • M. Mudrinic
  • K. Mueller
  • P. Murin
  • Th. Naumann
  • P. R. Newman
  • C. Niebuhr
  • A. Nikiforov
  • G. Nowak
  • K. Nowak
  • M. Nozicka
  • B. Olivier
  • J. E. Olsson
  • Sakar Osman
  • D. Ozerov
  • V. Palichik
  • I. Panagoulias
  • M. Pandurovic
  • Th. Papadopoulou
  • C. Pascaud
  • G. D. Patel
  • O. Pejchal
  • E. Perez
  • A. Petrukhin
  • I. Picuric
  • S. Piec
  • D. Pitzl
  • R. Placakyte
  • B. Pokorny
  • R. Polifka
  • B. Povh
  • T. Preda
  • V. Radescu
  • A. J. Rahmat
  • N. Raicevic
  • A. Raspiareza
  • T. Ravdandorj
  • P. Reimer
  • E. Rizvi
  • P. Robmann
  • B. Roland
  • R. Roosen
  • A. Rostovtsev
  • M. Rotaru
  • J. E. Ruiz Tabasco
  • Z. Rurikova
  • S. Rusakov
  • D. Salek
  • D. P. C. Sankey
  • M. Sauter
  • E. Sauvan
  • S. Schmitt
  • L. Schoeffel
  • A. Schoening
  • H. -C. Schultz-Coulon
  • F. Sefkow
  • R. N. Shaw-West
  • N. Shtarkov
  • S. Shushkevich
  • T. Sloan
  • I. Smiljanic
  • Y. Soloviev
  • P. Sopicki
  • D. South
  • V. Spaskov
  • A. Specka
  • Z. Staykova
  • M. Steder
  • B. Stella
  • G. Stoicea
  • U. Straumann
  • D. Sunar
  • T. Sykora
  • V. Tchoulakov
  • G. Thompson
  • P. D. Thompson
  • T. Toll
  • F. Tomasz
  • T. H. Tran
  • D. Traynor
  • T. N. Trinh
  • P. Truoel
  • I. Tsakov
  • B. Tseepeldorj
  • J. Turnau
  • K. Urban
  • A. Valkarova
  • C. Vallee
  • P. Van Mechelen
  • A. Vargas Trevino
  • Y. Vazdik
  • S. Vinokurova
  • V. Volchinski
  • M. von den Driesch
  • D. Wegener
  • Ch. Wissing
  • E. Wuensch
  • J. Zacek
  • J. Zalesak
  • Z. Zhang
  • A. Zhokin
  • T. Zimmermann
  • H. Zohrabyan
  • F. Zomer
  • R. Zus

Summary, in English

Diffractive electroproduction of rho and phi 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 rho and 2000 phi 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 vertical bar t vertical bar <= 3 GeV2. The total, longitudinal and transverse cross sections are measured as a function of Q(2), W and vertical bar t vertical bar. The measurements show a transition to a dominantly "hard" behaviour, typical of high gluon densities and small q (q) over bar 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-V(2))/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.

Department/s

  • Particle and nuclear physics

Publishing year

2010

Language

English

Pages

1-111

Publication/Series

Journal of High Energy Physics

Volume

2010

Issue

5

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • Lepton-Nucleon Scattering

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479