Measurement of the Z/γ∗+ b-jet cross section in pp collisions at √s = 7 TeV

The production of b jets in association with a Z/γ∗ boson is studied using proton-proton collisions delivered by the LHC at a centre-of-mass energy of 7 TeV and recorded by the CMS detector. The inclusive cross section for Z/γ∗+ b-jet production is measured in a sample corresponding to an integrated...

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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, Jordá Lope, Clara, Lobelle Pardo, Patricia, 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, Piedra Gómez, Jonatan|||0000-0002-9157-1700, Rodrigo Anoro, Teresa, Rodríguez Marrero, Ana Yaiza, Ruiz Jimeno, Alberto|||0000-0002-3639-0368, Scodellaro, Luca|||0000-0002-4974-8330, Sobrón Sañudo, Mar, 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:10902/28933
Acceso en línea:https://hdl.handle.net/10902/28933
Access Level:acceso abierto
Palabra clave:Hadron-hadron scattering
Descripción
Sumario:The production of b jets in association with a Z/γ∗ boson is studied using proton-proton collisions delivered by the LHC at a centre-of-mass energy of 7 TeV and recorded by the CMS detector. The inclusive cross section for Z/γ∗+ b-jet production is measured in a sample corresponding to an integrated luminosity of 2.2 fb−1 . The Z/γ∗+ bjet cross section with Z/γ∗ → ℓℓ  (where ℓℓ  = ee or µµ) for events with the invariant mass 60 < Mℓℓ  < 120 GeV, at least one b jet at the hadron level with pT > 25 GeV and |η| < 2.1, and a separation between the leptons and the jets of ∆R > 0.5 is found to be 5.84±0.08 (stat.)±0.72 (syst.) +0.25 −0.55 (theory) pb. The kinematic properties of the events are also studied and found to be in agreement with the predictions made by the MadGraph event generator with the parton shower and the hadronisation performed by pythia.