%0 Journal Article
%T Observation of a New Excited D-s(+) Meson in B-0 -> D- D+ K+ pi(-) Decays
%A LHCb Collaboration (Aaij, R. et al
%A Henry, L.
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%J Physical Review Letters
%D 2021
%V 126
%N 12
%I Amer Physical Soc
%@ 0031-9007
%G English
%F LHCbCollaborationAaij_etal2021
%O WOS:000646119900007
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4806), last updated on Thu, 20 May 2021 09:24:02 +0000
%X 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 B-0 -> 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 +/- 6 +/- 7 MeV, Gamma(R) = 89 +/- 16 +/- 12 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.
%R 10.1103/PhysRevLett.126.122002
%U https://arxiv.org/abs/2011.09112
%U https://doi.org/10.1103/PhysRevLett.126.122002
%P 122002 - 11pp