Search for heavy narrow dilepton resonances in pp collisions at  √s=7 TeV and s=8 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:10.1016/j.physletb.2013.02.003

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Identificadores

URI: http://hdl.handle.net/10902/25794

DOI: 10.1016/j.physletb.2013.02.003

ISSN: 0370-2693

ISSN: 1873-2445

; [et al.]

Fecha

2013-03

Derechos

Publicado en

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2013, 720(1-3), 63-82

Editorial

Elsevier

Enlace a la publicación

https://doi.org/10.1016/j.physletb.2013.02.003

Palabras clave

CMS

Physics

Resonances

Muons

Electrons

Resumen/Abstract

An updated search for heavy narrow resonances decaying to muon or electron pairs using the CMS detector is presented. Data samples from pp collisions at √s = 7 TeV and 8 TeV at the LHC, with integrated luminosities of up to 5.3 and 4.1 fb−1, respectively, are combined. No evidence for a heavy narrow resonance is observed. The analysis of the combined data sets excludes, at 95% confidence level, a Sequential Standard Model Z'SSM resonance lighter than 2590 GeV, a superstring-inspired Z'ψ lighter than 2260 GeV, and Kaluza–Klein gravitons lighter than 2390 (2030) GeV, assuming that the coupling parameter k/MPl is 0.10 (0.05). These are the most stringent limits to date.

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