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Title: Quantum numbers of the X (3872 ) state and orbital angular momentum in its ρ0J /ψ decay
Author: Badalov, A.
Casanova Mohr, R.
Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Diaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Olloqui, E. Picatoste
Molina, V. Rives
Ruiz, Hugo
LHCb collaboration
Keywords: Hadrons
Gran Col·lisionador d'Hadrons
Física de partícules
Large Hadron Collider (France and Switzerland)
Particle physics
Issue Date: 30-Jul-2015
Publisher: American Physical Society
Abstract: Angular correlations in B+ → X(3872)K+ decays, with X(3872) → ρ 0J/ψ, ρ 0 → π +π − and J/ψ → µ +µ −, are used to measure orbital angular momentum contributions and to determine the J P C value of the X(3872) meson. The data correspond to an integrated luminosity of 3.0 fb−1 of proton-proton collisions collected with the LHCb detector. This determination, for the first time performed without assuming a value for the orbital angular momentum, confirms the quantum numbers to be J P C = 1++. The X(3872) is found to decay predominantly through S wave and an upper limit of 4% at 95% C.L. is set on the D-wave contribution.
Note: Reproducció del document publicat a:
It is part of: Physical Review D, 2015, vol. 92, num. 011102, p. 1-24
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ISSN: 2470-0010
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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