Measurement of the X(3872) production cross section via decays to J/ψπ+π− in pp collisions at √s = 7 TeV

The production of the X(3872) is studied in pp collisions at √ s = 7 TeV, using decays to J/ψπ+π −, where the J/ψ decays to two muons. The data were recorded by the CMS experiment and correspond to an integrated luminosity of 4.8 fb−1 . The measurements are performed in a kinematic range in which th...

Descripción completa

Detalles Bibliográficos
Autores: Chatrchyan, Serguei, Brochero Cifuentes, Javier Andrés|||0000-0003-2093-7856, Cabrillo Bartolomé, José Iban|||0000-0002-0367-4022, 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, Graziano, Alberto, Jordá Lope, Clara, 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, Rodrigo Anoro, Teresa, Rodríguez Marrero, Ana Yaiza, Ruiz Jimeno, Alberto|||0000-0002-3639-0368, Scodellaro, Luca|||0000-0002-4974-8330, Vila Álvarez, Iván |||0000-0002-6797-7209, Vilar Cortabitarte, Rocío|||0000-0003-2045-8054
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/25647
Acceso en línea:http://hdl.handle.net/10902/25647
Access Level:acceso abierto
Palabra clave:Hadron-Hadron Scattering
Descripción
Sumario:The production of the X(3872) is studied in pp collisions at √ s = 7 TeV, using decays to J/ψπ+π −, where the J/ψ decays to two muons. The data were recorded by the CMS experiment and correspond to an integrated luminosity of 4.8 fb−1 . The measurements are performed in a kinematic range in which the X(3872) candidates have a transverse momentum 10 < pT < 50 GeV and rapidity |y| < 1.2. The ratio of the X(3872) and ψ(2S) cross sections times their branching fractions into J/ψπ+π − is measured as a function of pT. In addition, the fraction of X(3872) originating from B decays is determined. From these measurements the prompt X(3872) differential cross section times branching fraction as a function of pT is extracted. The π +π − mass spectrum of the J/ψπ+π − system in the X(3872) decays is also investigated.