The resonant substructure of Bs0→D¯0K-π+ decays is studied using a data sample corresponding to an integrated luminosity of 3.0fb-1 of pp collision data recorded by the LHCb detector. An excess at m(D¯0K-)≈2.86GeV/c2 is found to be an admixture of spin-1 and spin-3 resonances. Therefore, the DsJ∗(2860)- state previously observed in inclusive e+e-→D¯0K-X and pp→D¯0K-X processes consists of at least two particles. This is the first observation of a heavy flavored spin-3 resonance, and the first time that any spin-3 particle has been seen to be produced in B decays. The masses and widths of the new states and of the Ds2∗(2573)- meson are measured, giving the most precise determinations to date.

Observation of Overlapping Spin-1 and Spin-3 D ¯ 0K- Resonances at Mass 2.86GeV /c2 / R., A., B., A., M., A., A., A., Z., A., S., A., J., A., F., A., M., A., S., A., G., A., P. A., C., J. a., A., S., A., S., A., Y., A., L., A.n., L., A., J., A., R., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 113:(2014). [10.1103/PhysRevLett.113.162001]

Observation of Overlapping Spin-1 and Spin-3 D ¯ 0K- Resonances at Mass 2.86GeV /c2

G. Casse;SARTI, ALESSIO;SCIUBBA, Adalberto;
2014

Abstract

The resonant substructure of Bs0→D¯0K-π+ decays is studied using a data sample corresponding to an integrated luminosity of 3.0fb-1 of pp collision data recorded by the LHCb detector. An excess at m(D¯0K-)≈2.86GeV/c2 is found to be an admixture of spin-1 and spin-3 resonances. Therefore, the DsJ∗(2860)- state previously observed in inclusive e+e-→D¯0K-X and pp→D¯0K-X processes consists of at least two particles. This is the first observation of a heavy flavored spin-3 resonance, and the first time that any spin-3 particle has been seen to be produced in B decays. The masses and widths of the new states and of the Ds2∗(2573)- meson are measured, giving the most precise determinations to date.
2014
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of Overlapping Spin-1 and Spin-3 D ¯ 0K- Resonances at Mass 2.86GeV /c2 / R., A., B., A., M., A., A., A., Z., A., S., A., J., A., F., A., M., A., S., A., G., A., P. A., C., J. a., A., S., A., S., A., Y., A., L., A.n., L., A., J., A., R., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 113:(2014). [10.1103/PhysRevLett.113.162001]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/665071
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