Measurement of the top-quark mass in tt events with lepton+jets final states in pp collisions at √s = 7 TeV

The mass of the top quark is measured using a sample of tt candidate events with one electron or muon and at least four jets in the final state, collected by CMS in pp collisions at √ s = 7 TeV at the LHC. A total of 5174 candidate events is selected from data corresponding to an integrated luminosi...

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Detalles Bibliográficos
Autores: Chatrchyan, S., Brochero Cifuentes, Javier Andrés|||0000-0003-2093-7856, Cabrillo Bartolomé, José Iban, Calderón Tazón, Alicia|||0000-0002-7205-2040, Chuang, S. H., Duarte Campderros, Jorge|||0000-0003-0687-5214, Felcini, Marta, Fernández García, Marcos|||0000-0002-4824-1087, Gómez Gramuglio, Gervasio|||0000-0002-1077-6553, González Sánchez, Francisco Javier, Graziano, Alberto, Jordá Lope, Clara, López Virto, María Amparo, Marco de Lucas, Jesús|||0000-0001-7914-8494, Marco de Lucas, Rafael José, Martínez Rivero, Celso, Matorras Weinig, Francisco|||0000-0003-4295-5668, Muñoz Sánchez, Francisca Javiela, Rodrigo Anoro, Teresa, Rodríguez Marrero, Ana Yaiza, Ruiz Jimeno, Alberto|||0000-0002-3639-0368, Scodellaro, Luca|||0000-0002-4974-8330, Vila Álvarez, Iván |||0000-0002-6797-7209, Vilar Cortabitarte, Rocío|||0000-0003-2045-8054
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/28931
Acceso en línea:https://hdl.handle.net/10902/28931
Access Level:acceso abierto
Palabra clave:Hadron-hadron scattering
Descripción
Sumario:The mass of the top quark is measured using a sample of tt candidate events with one electron or muon and at least four jets in the final state, collected by CMS in pp collisions at √ s = 7 TeV at the LHC. A total of 5174 candidate events is selected from data corresponding to an integrated luminosity of 5.0 fb−1 . For each event the mass is reconstructed from a kinematic fit of the decay products to a tt hypothesis. The topquark mass is determined simultaneously with the jet energy scale (JES), constrained by the known mass of the W boson in qq decays, to be 173.49±0.43 (stat.+JES)±0.98 (syst.) GeV.