Evidence for associated production of a single top quark and W Boson 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:10.1103/PhysRevLett.110.022003

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EvidenceAssociatedPr ... (389.7Kb)

Identificadores

URI: http://hdl.handle.net/10902/25454

DOI: 10.1103/PhysRevLett.110.022003

ISSN: 0031-9007

ISSN: 1079-7114

; [et al.]

Fecha

2013-01-11

Director/es

Derechos

Publicado en

Physical Review Letters, 2013, 110(2), 022003

Editorial

American Physical Society

Enlace a la publicación

https:/doi.org/10.1103/PhysRevLett.110.022003

Resumen/Abstract

Evidence is presented for the associated production of a single top quark and W boson in pp collisions at √s=7 TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 4.9 fb−1. The measurement is performed using events with two leptons and a jet originated from a b quark. A multivariate analysis based on kinematic properties is utilized to separate the t¯t background from the signal. The observed signal has a significance of 4.0σ and corresponds to a cross section of 16+5−4 pb, in agreement with the standard model expectation of 15.6±0.4+1.0−1.2 pb.

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