TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Oyanguren, A.
AU  - Ruiz Valls, P.
PY  - 2013
DA  - 2013//
TI  - Determination of the X(3872) Meson Quantum Numbers
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 222001
EP  - 8pp
VL  - 110
IS  - 22
PB  - Amer Physical Soc
AB  - 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.
SN  - 0031-9007
UR  - http://arxiv.org/abs/arXiv:1302.6269
UR  - https://doi.org/10.1103/PhysRevLett.110.222001
DO  - 10.1103/PhysRevLett.110.222001
LA  - English
N1  - WOS:000319682200007
ID  - LHCbCollaborationAaij_etal2013
ER  -