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LHCb Collaboration; Oyanguren Campos, Arantza Perfil; Ruiz Valls, Pablo | |
Aquest document és un/a article, creat/da en: 2013 | |
Este documento está disponible también en : http://dx.doi.org/10.1103/PhysRevLett.110.222001 |
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The quantum numbers of the X(3872) meson are determined to be J(PC) = 1(++) based on angular correlations in B+ -> X(3872)K+ decays, where X(3872) -> pi(+) pi(-) j/psi and J/psi -> pi(+) mu(-). The data correspond to 1.0 fb(-1) of pp collisions collected by the LHCb detector. The only alternative assignment allowed by previous measurements J(PC) = 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. | |
LHCb Collaboration Oyanguren Campos, Arantza Ruiz Valls, Pablo 2013 Determination of the X(3872) Meson Quantum Numbers Physical Review Letters 110 22 222001 - 1 222001 - 8 |
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http://dx.doi.org/10.1103/PhysRevLett.110.222001 |