Search for first generation scalar leptoquarks in the e?jj channel in pp collisions at vs=7 TeV
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Chatrchyan, Serguei; Brochero Cifuentes, Javier Andrés; Cabrillo Bartolomé, José Ibán; Calderón Tazón, Alicia; Chuang, S. H.; Duarte Campderros, Jorge; Felcini, Marta; Fernández García, Marcos; Gómez Gramuglio, Gervasio; González Sánchez, Francisco Javier; Jordá Lope, Clara; Lobelle Pardo, Patricia; López Virto, María Amparo; Marco de Lucas, Jesús; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Matorras Weinig, Francisco; Muñoz Sánchez, Francisca Javiela; Piedra Gómez, Jonatan; [et al.]Fecha
2011-09Derechos
Attribution-NonCommercial-NoDerivatives 4.0 International. ©2011 CERN, for the benefit of the CMS Collaboration. Published by Elsevier B.V. Open access under CC BY-NC-ND license.
Publicado en
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2011, 703(3), 246-266
Editorial
Elsevier
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Palabras clave
LHC
CMS
Physics
Exotica
Leptoquarks
Resumen/Abstract
A search for pair-production of first generation scalar leptoquarks is performed in the final state con-
taining an electron, a neutrino, and at least two jets using proton?proton collision data at ?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 lep-
toquark at 339 GeV for ? = 0.5, where ? 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 ? greater
than 0.05.
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