Observation of Overlapping Spin-1 and Spin-3 D[overbar][superscript 0]K[superscript -] Resonances at Mass 2.86 GeV/c[superscript 2]
The resonant substructure of B_{s}^{0}→D[over ¯]^{0}K^{-}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[over ¯]^{0}K^{-})≈2.86 GeV/c^{2} is found to be an admixture of spin-1...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2014
|
| Online Access: | http://hdl.handle.net/1721.1/92293 https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 |
| Summary: | The resonant substructure of B_{s}^{0}→D[over ¯]^{0}K^{-}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[over ¯]^{0}K^{-})≈2.86 GeV/c^{2} is found to be an admixture of spin-1 and spin-3 resonances. Therefore, the D_{sJ}^{*}(2860)^{-} state previously observed in inclusive e^{+}e^{-}→D[over ¯]^{0}K^{-}X and pp→D[over ¯]^{0}K^{-}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 D_{s2}^{*}(2573)^{-} meson are measured, giving the most precise determinations to date. |
|---|