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Observation of Overlapping Spin-1 and Spin-3 D[overbar][superscript 0]K[superscript -] Resonances at Mass 2.86 GeV/c[superscript 2]

Author(s)
LHCb collaboration; Counts, Ian Thomas Hunt; Ilten, Philip James; Williams, M.
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Alternative title
Observation of Overlapping Spin-1 and Spin-3 D¯0K− Resonances at Mass 2.86  GeV/c2
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Creative Commons Attribution http://creativecommons.org/licenses/by/3.0
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Abstract
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.
Date issued
2014-10
URI
http://hdl.handle.net/1721.1/92293
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij. R. et al. (LHCb Collaboration) "Observation of Overlapping Spin-1 and Spin-3 D[overbar][superscript 0]K[superscript -] Resonances at Mass 2.86 GeV/c[superscript 2]." Phys. Rev. Lett. 113, 162001.
Version: Final published version
ISSN
0031-9007
1079-7114

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