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W gamma Production and Limits on Anomalous WW gamma Couplings in p(p)over-bar Collisions at root s=1.96 TeV

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  • V. M. Abazov
  • B. Abbott
  • B. S. Acharya
  • M. Adams
  • T. Adams
  • G. D. Alexeev
  • G. Alkhazov
  • A. Alton
  • G. Alverson
  • G. A. Alves
  • M. Aoki
  • M. Arov
  • A. Askew
  • B. Asman
  • S. Atkins
  • O. Atramentov
  • K. Augsten
  • C. Avila
  • J. BackusMayes
  • F. Badaud
  • L. Bagby
  • B. Baldin
  • D. V. Bandurin
  • S. Banerjee
  • E. Barberis
  • P. Baringer
  • J. Barreto
  • J. F. Bartlett
  • U. Bassler
  • V. Bazterra
  • A. Bean
  • M. Begalli
  • M. Begel
  • C. Belanger-Champagne
  • L. Bellantoni
  • S. B. Beri
  • G. Bernardi
  • R. Bernhard
  • I. Bertram
  • M. Besancon
  • R. Beuselinck
  • V. A. Bezzubov
  • P. C. Bhat
  • V. Bhatnagar
  • G. Borissov
  • H. Fox
  • D. Price
  • P. N. Ratoff
  • A. Ross
  • M. R. J. Williams
  • DO Collaboration
Article number241803
<mark>Journal publication date</mark>9/12/2011
<mark>Journal</mark>Physical review letters
Issue number24
Number of pages7
Pages (from-to)-
Publication StatusPublished
<mark>Original language</mark>English


We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W(-> l nu) + gamma production in e gamma and mu gamma final states. Using data corresponding to an integrated luminosity of 4.2 fb(-1) collected with the D0 detector at the Fermilab Tevatron Collider, the measured cross section times branching fraction for the process p (p) over bar -> W gamma + X -> l nu gamma + X and the distribution of the charge-signed photon-lepton rapidity difference are found to be in agreement with the standard model. These results provide the most stringent limits on anomalous WW gamma couplings for data from hadron colliders: -0.4 < Delta kappa(gamma) < 0.4 and -0.08 < lambda(gamma) < 0.07 at the 95% C.L.

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© 2011 American Physical Society