2026-04-17T01:16:13Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1856652025-12-05T16:58:56Zcom_2072_1057col_2072_478823col_2072_478917

00925njm 22002777a 4500 dc Badalov, A. author Casanova Mohr, R. author Garrido Beltrán, Lluís author Gascón Fora, David author Graciani Diaz, Ricardo author Graugés Pous, Eugeni author Marin Benito, Carla author Picatoste Olloqui, Eduardo author Molina, V. Rives author Ruiz, Hugo (Ruiz Pérez) author LHCb collaboration author 2022-05-17T15:53:45Z 2022-05-17T15:53:45Z 2015-07-30 2022-05-17T15:53:46Z 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. Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments Quantum numbers of the X (3872 ) state and orbital angular momentum in its ρ0J /ψ decay