@article{10902/13951,
year = {2015},
month = {6},
url = {http://hdl.handle.net/10902/13951},
abstract = {The first measurement of the cross section ratio sttbb/sttjj is presented using a data sample corresponding to an integrated luminosity of 19.6fb-1 collected in pp collisions at vs=8TeV with the CMS detector at the LHC. Events with two leptons (eor µ) and four reconstructed jets, including two identified as b quark jets, in the final state are selected. The ratio is determined for a minimum jet transverse momentum pTof both 20 and 40GeV/c. The measured ratio is 0.022 ±0.003 (stat) ±0.005 (syst) for pT>20GeV/c. The absolute cross sections sttbb and sttjj are also measured. The measured ratio for pT>40GeV/c is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order.},
publisher = {Elsevier},
publisher = {Physics Letters B, Vol. 746, Pp. 132–153, 2015},
title = {Measurement of the cross section ratio σ ttbb/σ ttjj in pp collisions at √s=8TeV},
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},
}