Observation of a New Excited $D^+_s$ Meson in $B^0 \rightarrow D^- D^+ K^+ \pi^-$ Decays - INSPIRE

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Observation of a New Excited $D^+_s$ Meson in $B^0 \rightarrow D^- D^+ K^+ \pi^-$ Decays

LHCb

Collaboration

Nov 18, 2020

11 pages

Published in:

Phys.Rev.Lett. 126 (2021) 12, 122002

Published: Mar 27, 2021

e-Print:

2011.09112 [hep-ex]

DOI:

10.1103/PhysRevLett.126.122002

PDG:

{{\mathit D}_{{{s0}}}{(2590)}^{+}}

\rightarrow

{{\mathit D}^{+}}{{\mathit K}^{+}}{{\mathit \pi}^{-}}

Report number:

CERN-EP-2020-203,
LHCb-PAPER-2020-034

Experiments:

CERN-LHC-LHCb

View in:

reference search36 citations

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Abstract: (APS)

Using pp collision data corresponding to an integrated luminosity of 5.4 fb-1 collected with the LHCb detector at a center-of-mass energy of 13 TeV, the B0→D-D+K+π- decay is studied. A new excited Ds+ meson is observed decaying into the D+K+π- 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 mR=2591±6±7 MeV, ΓR=89±16±12 MeV, and JP=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 Ds0(2590)+, is a strong candidate to be the Ds(2S10)+ state, the radial excitation of the pseudoscalar ground-state Ds+ meson.

Note:

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)

Elementary Particles and Fields
p p: colliding beams
resonance: production
mass: pole
p p: scattering
D0: hadronic decay
amplitude analysis
statistical
D/s+: excited state
ground state

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Figures(9)

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