Angular correlations in B+→X(3872)K+ decays, with X(3872)→ρ0J/ψ, ρ0→π+π- and J/ψ→μ+μ-, are used to measure orbital angular momentum contributions and to determine the JPC value of the X(3872) meson. The data correspond to an integrated luminosity of 3.0fb-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 JPC=1++. The X(3872) is found to decay predominantly through an S wave and an upper limit of 4% at 95% C.L. is set on the D-wave contribution.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Quantum numbers of the X (3872) state and orbital angular momentum in its ρ0J/ψ decay. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 92(1) [10.1103/PhysRevD.92.011102].

Quantum numbers of the X (3872) state and orbital angular momentum in its ρ0J/ψ decay

Borsato, M;CALVI, MARTA;CARNITI, PAOLO;CASSINA, LORENZO;GOTTI, CLAUDIO;KHANJI, BASEM;Martinelli, M;Petruzzo, M;
2015

Abstract

Angular correlations in B+→X(3872)K+ decays, with X(3872)→ρ0J/ψ, ρ0→π+π- and J/ψ→μ+μ-, are used to measure orbital angular momentum contributions and to determine the JPC value of the X(3872) meson. The data correspond to an integrated luminosity of 3.0fb-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 JPC=1++. The X(3872) is found to decay predominantly through an S wave and an upper limit of 4% at 95% C.L. is set on the D-wave contribution.
Articolo in rivista - Articolo scientifico
lhcb
English
2015
92
1
011102
none
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Quantum numbers of the X (3872) state and orbital angular momentum in its ρ0J/ψ decay. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 92(1) [10.1103/PhysRevD.92.011102].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/90839
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