Observation of overlapping spin-1 and spin-3 D¯0K- resonances at mass 2.86 GeV/c2

LHCb Collaboration, R. Aaij*, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. AndersonR. Andreassen, M. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, S. Bifani, N. Farley, P. Griffith, P. Ilten, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, C. J. Parkinson, L. Pescatore, D. Popov, N. K. Watson

*Corresponding author for this work

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Abstract

The resonant substructure of B0s→D¯0K-π+ decays is studied using a data sample corresponding to an integrated luminosity of 3.0 fb-1 of pp collision data recorded by the LHCb detector. An excess at m(D¯0K-)≈2.86 GeV/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
Number of pages9
JournalPhysical Review Letters
Volume113
Issue number16
DOIs
Publication statusPublished - 14 Oct 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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