Observation of a new excited $D_s^{+}$ meson in $B^0\to D^{-}{D}^{+}{K}^{+}{\pi }^{-}$ decays

Abstract

Using $pp$ collision data corresponding to an integrated luminosity of $5.4{\mathrm{fb}}^{-1}$ collected with the LHCb detector at a center-of-mass energy of $13\mathrm{TeV}$, the $B^0\to D^{-}{D}^{+}{K}^{+}{\pi }^{-}$ decay is studied. A new excited $D_s^{+}$ meson is observed decaying into the $D^{+}{K}^{+}{\pi }^{-}$ final state with large statistical significance. The pole mass and width, and the spin-parity of the new state are measured with an amplitude analysis to be $m_R=2591\pm 6\pm 7\mathrm{MeV}$, ${\Gamma }_R=89\pm 16\pm 12\mathrm{MeV}$ and $J^P=0^{-}$, where the first uncertainty is statistical and the second systematic. Fit fractions for all components in the amplitude analysis are also reported. The new resonance, denoted as $D_{s0}(2590{)}^{+}$, is a strong candidate to be the $D_s(2^1{S}_0{)}^{+}$ state, the radial excitation of the pseudoscalar ground-state $D_s^{+}$ meson.

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-034.html (LHCb public pages)

References in corpus (4)

• Amplitude analysis of the $B^{+}\to D^{+}{D}^{-}{K}^{+}$ decay
• Model-independent study of structure in $B^{+}\to D^{+}{D}^{-}{K}^{+}$ decays
• Dalitz plot analyses of $B^0\to D^{-}{D}^0{K}^{+}$ and $B^{+}\to {\overline{D}}^0{D}^0{K}^{+}$ decays
• Experimental status of excited $D_s^{+}$ mesons

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• First observation of the $B^{+}\to D_s^{+}{D}_s^{-}{K}^{+}$ decay
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• Radially excited (n=3)charm mesons in heavy quark effective theory
• Strong and electromagnetic decays of the radially excited $D_s$ and $B_s$ mesons in light cone QCD sum rules
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