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Search for single production of scalar leptoquarks in proton-proton collisions at √s=8  TeV

AutorKhachatryan, V.; Brochero Cifuentes, J. A. ; Cabrillo, I. J. ; Calderon, Alicia ; Castiñeiras De Saa, J. R.; Duarte Campderros, J. ; Fernández, M. ; Gómez, G. ; Graziano, A. ; López Virto, A. ; Marco, Jesús ; Marco, Rafael ; Martínez-Rivero, Celso ; Matorras, Francisco ; Muñoz Sánchez, F. J. ; Piedra, Jonatan ; Rodrigo, Teresa ; Rodríguez Marrero, Ana Y. ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; CMS Collaboration
Fecha de publicación2016
CitaciónPhysical Review D 93(3): 032005 (2016)
ResumenA search is presented for the production of both first- and second-generation scalar leptoquarks with a final state of either two electrons and one jet or two muons and one jet. The search is based on a data sample of proton-proton collisions at center-of-mass energy √s=8  TeV recorded with the CMS detector and corresponding to an integrated luminosity of 19.6  fb−1. Upper limits are set on both the first- and second-generation leptoquark production cross sections as functions of the leptoquark mass and the leptoquark couplings to a lepton and a quark. Results are compared with theoretical predictions to obtain lower limits on the leptoquark mass. At 95% confidence level, single production of first-generation leptoquarks with a coupling and branching fraction of 1.0 is excluded for masses below 1730 GeV, and second-generation leptoquarks with a coupling and branching fraction of 1.0 is excluded for masses below 530 GeV. These are the best overall limits on the production of first-generation leptoquarks to date.
Descripciónet al.
Versión del editorhttps://doi.org/10.1103/PhysRevD.93.032005
URIhttp://hdl.handle.net/10261/140853
DOI10.1103/PhysRevD.93.032005
Identificadoresdoi: 10.1103/PhysRevD.93.032005
e-issn: 1550-2368
issn: 1550-7998
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