Search for Pair Production of First-Generation Scalar Leptoquarks in pp Collisions at √s=7  TeV
Journal Article

Published: Tuesday, May 17, 2011
Citation: Physical Review Letters, Volume 1-6, Number 20, Pages 201802
arXiv.org: 1012.4031
Link: http://prl.aps.org/abstract/PRL/v106/i20/e201802

Authors (1 total): J. Rohlf

Abstract:

A search for pair production of first-generation scalar leptoquarks is performed in the final state containing two electrons and two jets using proton-proton collision data at √s=7  TeV. The data sample used corresponds to an integrated luminosity of 33  pb-1 collected with the CMS detector at the CERN LHC. The number of observed events is in good agreement with the predictions for the standard model background processes, and an upper limit is set on the leptoquark pair production cross section times β2 as a function of the leptoquark mass, where β is the branching fraction of the leptoquark decay to an electron and a quark. A 95% confidence level lower limit is set on the mass of a first-generation scalar leptoquark at 384 GeV for β=1, which is the most stringent direct limit to date.