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Leif Jönsson

Leif Jönsson

Professor emeritus

Leif Jönsson

Deeply virtual Compton scattering and its beam charge asymmetry in e(+/-)p collisions at HERA

Author

  • F. D. Aaron
  • M. Aldaya Martin
  • C. Alexa
  • K. Alimujiang
  • V. Andreev
  • B. Antunovic
  • 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
  • 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
  • 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
  • D. Nikitin
  • 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
  • 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. Seflow
  • R. N. Shaw-West
  • L. 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 Trevinok
  • 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

A measurement of elastic deeply virtual Compton scattering gamma*p --> gamma p using e(+) p and e(-) p collision data recorded with the HI detector at HERA is presented. The analysed data sample corresponds to an integrated luminosity of 306 pb(-1), almost equally shared between both beam charges. The cross section is measured as a function of the virtuality Q(2) of the exchanged photon and the centre-of-mass energy W of the gamma*p system in the kinematic domain 6.5 < Q(2) < 80 GeV2, 30 < W < 140 GeV and |t| < 1 GeV2, where t denotes the squared momentum transfer at the proton vertex. The cross section is determined differentially in t for different Q(2) and W values and exponential t-slope parameters are derived. Using e(+) p and e(-) p data samples, a beam charge asymmetry is extracted for the first time in the low Biorken x kinematic domain. The observed asymmetry is attributed to the interference between Bethe-Heitler and deeply virtual Compton scattering processes. Experimental results are discussed in the context of two different models, one based on generalised parton distributions and one based on the dipole approach. (C) 2009 Elsevier B.V. All rights reserved.

Department/s

  • Particle and nuclear physics

Publishing year

2009

Language

English

Pages

391-399

Publication/Series

Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

681

Issue

5

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0370-2693