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

Chatrchyan, S.; Brochero Cifuentes, Javier Andrés; Cabrillo Bartolomé, José Iban; Calderón Tazón, Alicia; Chuang, S. H.; Duarte Campderros, Jorge; Felcini, Marta; Fernández García, Marcos; Gómez Gramuglio, Gervasio; González Sánchez, Francisco Javier; Graziano, Alberto; Jordá Lope, Clara; López Virto, María Amparo; Marco de Lucas, Jesús; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Matorras Weinig, Francisco; Muñoz Sánchez, Francisca Javiela; Rodrigo Anoro, Teresa; Rodríguez Marrero, Ana Yaiza; Ruiz Jimeno, Alberto; Scodellaro, Luca; Vila Álvarez, Iván; Vilar Cortabitarte, Rocío

doi:10.1007/JHEP12(2012)105

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Identificadores

URI: https://hdl.handle.net/10902/28931

DOI: 10.1007/JHEP12(2012)105

ISSN: 1126-6708

ISSN: 1029-8479

; [et al.]

Fecha

2012-12

Derechos

Publicado en

Journal of High Energy Physics, 2012, 2012(12), 105

Editorial

Springer Verlag

Enlace a la publicación

https://doi.org/10.1007/JHEP12(2012)105

Palabras clave

Hadron-hadron scattering

Resumen/Abstract

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.

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