Search for Z' resonances decaying to tt- in dilepton+jets final states in pp collisions at root s=7 TeV

Chatrchyan, Serguei; 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/PhysRevD.87.072002

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Identificadores

URI: https://hdl.handle.net/10902/28773

DOI: 10.1103/PhysRevD.87.072002

ISSN: 1550-7998

ISSN: 1550-2368

ISSN: 2470-0010

ISSN: 2470-0029

; [et al.]

Fecha

2013-04-03

Derechos

Publicado en

Physical Review D - Particles, Fields, Gravitation and Cosmology, 2013, 87, 072002

Editorial

American Physical Society

Enlace a la publicación

https://doi.org/10.1103/PhysRevD.87.072002

Resumen/Abstract

A search for resonances decaying to top quark-antiquark pairs is performed using a dilepton+jets data sample recorded by the CMS experiment at the LHC in pp collisions at ?s=7 TeV corresponding to an integrated luminosity of 5.0 fb-1. No significant deviations from the standard model background are observed. Upper limits are presented for the production cross section times branching fraction of top quark-antiquark resonances for masses from 750 to 3000 GeV. In particular, the existence of a leptophobic topcolor particle Z? is excluded at the 95% confidence level for resonance masses MZ ?<1.3 TeV for ?Z?=0.012MZ ?, and M<1.9 TeV for ?Z?=0.10MZ ?.

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