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2013-05-29

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cc by (c) CERN; LHCb Collaboration, 2013
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/133347

Determination of the X(3872) Meson Quantum Numbers

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https://doi.org/10.1103/PhysRevLett.110.222001

Abstract

The quantum numbers of the X ( 3872 ) meson are determined to be J P C = 1 ++ based on angular correlations in B + → X ( 3872 ) K + decays, where X ( 3872 ) → π + π − J / ψ and J / ψ → μ + μ − . The data correspond to 1.0     fb − 1 of p p collisions collected by the LHCb detector. The only alternative assignment allowed by previous measurements J P C = 2 − + is rejected with a confidence level equivalent to more than 8 Gaussian standard deviations using a likelihood-ratio test in the full angular phase space. This result favors exotic explanations of the X ( 3872 ) state.

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Física de partícules, Experiments

Subject (English)

Particle physics, Experiments

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

Citation

ABELLAN BETETA, Carlos, et al. Determination of the X(3872) Meson Quantum Numbers. Physical Review Letters. 2013. Vol. 110, num. 22, pags. 222001. ISSN 0031-9007. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/133347

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