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Search for third-generation scalar leptoquarks in the tt channel in proton-proton collisions at vs=8 TeV

Abstract: A search for pair production of third-generation scalar leptoquarks decaying to top quark and t lepton pairs is presented using proton-proton collision data at a center-of-mass energy of vs=8 TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb-1. The search is performed using events that contain an electron or a muon, a hadronically decaying t lepton, and two or more jets. The observations are found to be consistent with the standard model predictions. Assuming that all leptoquarks decay to a top quark and a t lepton, the existence of pair produced, charge -1/3, third-generation leptoquarks up to a mass of 685 GeV is excluded at 95% confidence level. This result constitutes the first direct limit for leptoquarks decaying into a top quark and a t lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling ?333'.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Journal of High Energy Physics, Vol. 2015, Num. 7, Art. Num. 42

Editorial: Springer Verlag

 Fecha de publicación: 01/07/2015

Nº de páginas: 44

Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP07(2015)042

ISSN: 1126-6708,1029-8479

 Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

Url de la publicación: https://doi.org/10.1007/JHEP07(2015)042

Autoría

KHACHATRYAN, VLADIMIR

JAVIER ANDRES BROCHERO CIFUENTES

JUAN RAMON CASTIÑEIRAS DE SAA

MARCOS FERNANDEZ GARCIA

ALBERTO GRAZIANO

MARIA AMPARO LOPEZ VIRTO

RAFAEL JOSE MARCO DE LUCAS

FRANCISCA JAVIELA MUÑOZ SANCHEZ

ANA YAIZA RODRIGUEZ MARRERO