Search for first generation scalar leptoquarks in the e nu jj channel in pp collisions at root s=7 TeV


Chatrchyan S., Khachatryan V., Sirunyan A. M. , Tumasyan A., Adam W., Bergauer T., ...Daha Fazla

PHYSICS LETTERS B, cilt.703, ss.246-266, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 703 Konu: 3
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.physletb.2011.07.089
  • Dergi Adı: PHYSICS LETTERS B
  • Sayfa Sayıları: ss.246-266

Özet

A search for pair-production of first generation scalar leptoquarks is performed in the final state containing an electron, a neutrino, and at least two jets using proton-proton collision data at root s = 7 TeV. The data were collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 36 pb(-1). The number of observed events is in good agreement with the predictions for standard model processes. Prior CMS results in the dielectron channel are combined with this electron + neutrino search. A 95% confidence level combined lower limit is set on the mass of a first generation scalar leptoquark at 339 GeV for beta = 0.5, where beta is the branching fraction of the leptoquark to an electron and a quark. These results represent the most stringent direct limits to date for values of beta greater than 0.05. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.