# Journal article

## Determination of the X(3872) meson quantum numbers.

Abstract:
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)→π(+)π(-)J/ψ and J/ψ→μ(+)μ(-). 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.
Publication status:
Published

### Authors

Journal:
Physical Review Letters
Volume:
110
Issue:
22
Pages:
222001
Publication date:
2013-05-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Keywords:
Pubs id:
pubs:387276
UUID:
uuid:c98bb195-258a-4ed1-b813-3054c9849c99
Local pid:
pubs:387276
Source identifiers:
387276
Deposit date:
2013-11-16