@article{10902/13922,
year = {2014},
month = {9},
url = {http://hdl.handle.net/10902/13922},
abstract = {A search for supersymmetry through the direct pair production of top squarks, with Higgs (H) or Z bosons in the decay chain, is performed using a data sample of proton–proton collisions at vs=8 TeV collected in 2012 with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 19.5fb-1. The search is performed using a selection of events containing leptons and bottom-quark jets. No evidence for a significant excess of events over the standard model background prediction is observed. The results are interpreted in the context of simplified supersymmetric models with pair production of a heavier top-squark mass eigenstate ˜t2 decaying to a lighter top-squark mass eigenstate ˜t1 via either ˜t2?H˜t1or ˜t2?Z˜t1, followed in both cases by ˜t1?t˜?01, where ˜?01 is an undetected, stable, lightest supersymmetric particle. The interpretation is performed in the region where the mass difference between the ˜t1and ˜?01 states is approximately equal to the top-quark mass (m˜t1-m˜?01 mt), which is not probed by searches for direct ˜t1 squark pair production. The analysis excludes top squarks with masses m˜t2<575GeVand m˜t1<400GeVat a 95% confidence level.},
publisher = {Elsevier},
publisher = {Physics Letters B, Vol. 736, Pp. 371–397, (2014)},
title = {Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at vs=8 TeV},
author = {Khachatryan, Vladimir and Brochero Cifuentes, Javier Andrés and Cabrillo Bartolomé, José Iban and Calderón Tazón, Alicia and Duarte Campderros, Jorge and Fernández García, Marcos and Gómez Gramuglio, Gervasio and Graziano, Alberto and López Virto, María Amparo and Marco de Lucas, Jesús and Marco de Lucas, Rafael José and Martínez Rivero, Celso and Matorras Weinig, Francisco and Muñoz Sánchez, Francisca Javiela and Piedra Gómez, Jonatan and Rodrigo Anoro, Teresa and Rodríguez Marrero, Ana Yaiza and Ruiz Jimeno, Alberto and Scodellaro, Luca and Vila Álvarez, Iván  and Vilar Cortabitarte, Rocío},
}