Observation of a New Excited D s + Meson in B 0 → D − D + K + π − Decays
Name
PhysRevLett.126.122002.pdf
Description
Published version
Size
652.37 KB
Format
Adobe PDF
Checksum (MD5)
d2e14f9481d64376b882f33619e4d90f
Author(s)
Williams, Michael
Date Issued
2021
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Williams, Michael. 2021. "Observation of a New Excited D s + Meson in B 0 → D − D + K + π − Decays." Physical Review Letters, 126 (12).
Version
Final published version
Abstract
Using $pp$ collision data corresponding to an integrated luminosity of
$5.4\,{\rm fb}^{-1}$ collected with the LHCb detector at a center-of-mass
energy of $13\,{\rm TeV}$, 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
$m_R=2591\pm6\pm7\,{\rm MeV}$, $\Gamma_R=89\pm16\pm12\,{\rm MeV}$ 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.126.122002
