Institute: MPI für Physik     Collection: YB 2016     Display Documents

ID: 715990.0, MPI für Physik / YB 2016
Measurements of the masses and widths of the $\\Sigma_{c}(2455)^{0/++}$ and $\\Sigma_{c}(2520)^{0/++}$ baryons
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Audience:Not Specified
Intended Educational Use:No
Abstract / Description:We present measurements of the masses and decay widths of the baryonic states $\\Sigma_{c}(2455)^{0/++}$ and $\\Sigma_{c}(2520)^{0/++}$ using a data sample corresponding to an integrated luminosity of 711 fb$^{-1}$ collected with the Belle detector at the KEKB $e^{+}e^{-}$ asymmetric-energy collider operating at the $\\Upsilon(4S)$ resonance. We report the mass differences with respect to the $\\Lambda_{c}^{+}$ baryon $M(\\Sigma_{c}(2455)^{0})-M(\\Lambda_{c}^{+}) = 167.29\\pm0.01\\pm0.02$ MeV/$c^{2}$, $M(\\Sigma_{c}(2455)^{++})-M(\\Lambda_{c}^{+}) = 167.51\\pm0.01\\pm0.02$ MeV/$c^{2}$, $M(\\Sigma_{c}(2520)^{0})-M(\\Lambda_{c}^{+}) = 231.98\\pm0.11\\pm0.04$ MeV/$c^{2}$, $M(\\Sigma_{c}(2520)^{++})-M(\\Lambda_{c}^{+}) = 231.99\\pm0.10\\pm0.02$ MeV/$c^{2}$, and the decay widths $\\Gamma(\\Sigma_{c}(2455)^{0}) = 1.76\\pm0.04^{+0.09}_{-0.21}$ MeV/$c^{2}$, $\\Gamma(\\Sigma_{c}(2455)^{++}) = 1.84\\pm0.04^{+0.07}_{-0.20}$ MeV/$c^{2}$, $\\Gamma(\\Sigma_{c}(2520)^{0}) = 15.41\\pm0.41^{+0.20}_{-0.32}$ MeV/$c^{2}$, $\\Gamma(\\Sigma_{c}(2520)^{++}) = 14.77\\pm0.25^{+0.18}_{-0.30}$ MeV/$c^{2}$, where the first uncertainties are statistical and the second are systematic. The isospin mass splittings are measured to be $M(\\Sigma_{c}(2455)^{++})-M(\\Sigma_{c}(2455)^{0})=0.22\\pm0.01\\pm0.01$ MeV/$c^{2}$ and $M(\\Sigma_{c}(2520)^{++})-M(\\Sigma_{c}(2520)^{0})=0.01\\pm0.15\\pm0.03$ MeV/$c^{2}$. These results are the most precise to date.
Classification / Thesaurus:Belle II
Comment of the Author/Creator:13 pages, 4 figures
Document Type:Article
Communicated by:MPI für Physik
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