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Search for excited electrons in pp̄ collisions at s=1.96TeV

  • V. M. Abazov
  • , B. Abbott
  • , M. Abolins
  • , B. S. Acharya
  • , M. Adams
  • , T. Adams
  • , E. Aguilo
  • , S. H. Ahn
  • , M. Ahsan
  • , G. D. Alexeev
  • , G. Alkhazov
  • , A. Alton
  • , G. Alverson
  • , G. A. Alves
  • , M. Anastasoaie
  • , L. S. Ancu
  • , T. Andeen
  • , S. Anderson
  • , B. Andrieu
  • , M. S. Anzelc
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Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

We present the results of a search for the production of an excited state of the electron, e*, in proton-antiproton collisions at s=1.96TeV. The data were collected with the D0 experiment at the Fermilab Tevatron Collider and correspond to an integrated luminosity of approximately 1fb-1. We search for e* in the process pp̄→e*e, with the e* subsequently decaying to an electron plus photon. No excess above the standard model background is observed. Interpreting our data in the context of a model that describes e* production by four-fermion contact interactions and e* decay via electroweak processes, we set 95% C.L. upper limits on the production cross section ranging from 8.9 to 27 fb, depending on the mass of the excited electron. Choosing the scale for contact interactions to be Λ=1TeV, excited electron masses below 756 GeV are excluded at the 95% C.L.

Original languageEnglish
Article number091102
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume77
Issue number9
DOIs
StatePublished - May 12 2008

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