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Measurement of the relative rate of prompt χ c0, χ c1 and χ c2 production at TeV

By M. Calvo Gómez, Alessandro Camboni, Albert Comerma Montells, Lluís Garrido Beltrán, Ricardo Graciani Díaz, Eugeni Graugés Pous, A. Oyanguren, Antonio Pérez-Calero Yzquierdo, Eduardo Picatoste Olloqui, Cédric Potterat, Vicente José Rives Molina, Hugo (Ruiz Pérez) Ruiz, P. Ruiz Valls, X. Vilasis-Cardona and LHCb Collaboration

Abstract

Prompt production of charmonium χ c0, χ c1 and χ c2 mesons is studied using proton-proton collisions at the LHC at a centre-of-mass energy of TeX TeV. The χ c mesons are identified through their decay to J/ψγ, with J/ψ → μ + μ − using photons that converted in the detector. A data sample, corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb detector, is used to measure the relative prompt production rate of χ c1 and χ c2 in the rapidity range 2.0 < y < 4.5 as a function of the J/ψ transverse momentum from 3 to 20 GeV/c. First evidence for χ c0 meson production at a high-energy hadron collider is also presented

Topics: Hadrons, Quarks, Interaccions d'hadrons, Gran Col·lisionador d'Hadrons, Física nuclear, Teoria quàntica, Teoria quàntica de camps, Hadrons, Quarks, Hadron interactions, Large Hadron Collider (France and Switzerland), Nuclear physics, Quantum theory, Quantum field theory
Publisher: Springer Verlag
Year: 2014
DOI identifier: 10.1007/JHEP10(2013)115
OAI identifier: oai:diposit.ub.edu:2445/58723
Journal:

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