Observation of Overlapping Spin-1 and Spin-3 (D)over-bar(0)K(-)Resonances at Mass 2.86 GeV/c(2)

R. Aaij, S. Ali, J.F.J. van den Brand, K. De Bruyn, C. Farinelli, V.A.M. Heijne, T.J. Ketel, R.F. Koopman, A. Kozlinskiy, J. van Leerdam, M.H.M. Merk, S. Oggero, A. Pellegrino, H.G. Raven, H. Snoek, V. Syropoulos, P.N.Y. David, S. Tolk, Collaboration LHCb

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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.
Original languageEnglish
Article number162001
Pages (from-to)1-9
Number of pages9
JournalPhysical Review Letters
Publication statusPublished - 14 Oct 2014


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