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Article
Report number arXiv:2011.09112 ; CERN-EP-2020-203 ; LHCb-PAPER-2020-034 ; LHCB-PAPER-2020-034
Title Observation of a new excited D+s meson in B0 to DD+K+π decays
Related titleObservation of a New Excited Ds+ Meson in B0→D-D+K+π- Decays
Author(s) LHCb Collaboration  ყველა 971 ავტორის ჩვენება
Corporate Author(s) LHCb Collaboration
Publication 2021-03-27
Imprint 19 Nov 2020
Number of pages 11
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)
In: Phys. Rev. Lett. 126 (2021) 122002
DOI 10.1103/PhysRevLett.126.122002
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; QCD ; B physics ; charm physics ; particle and resonance production
Abstract Using pp collision data corresponding to an integrated luminosity of 5.4fb1 collected with the LHCb detector at a center-of-mass energy of 13TeV, the B0DD+K+π decay is studied. A new excited D+s 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±7MeV, ΓR=89±16±12MeV 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(21S0)+ state, the radial excitation of the pseudoscalar ground-state D+s meson.
Copyright/License publication: © 2021-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³
preprint: © 2020-2025 CERN (License: CC-BY-4.0)



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Email contact: lhcb.secretariat@cern.ch


 ჩანაწერი შექმნილია 2020-11-19, ბოლოს შესწორებულია 2024-10-02


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