Measurements of the properties of ${\ensuremath{\Lambda}}_{c}(2595)$, ${\ensuremath{\Lambda}}_{c}(2625)$, ${\ensuremath{\Sigma}}_{c}(2455)$, and ${\ensuremath{\Sigma}}_{c}(2520)$ baryons

Measurements of the properties of $Λ_{c} (2595)$ , $Λ_{c} (2625)$ , $Σ_{c} (2455)$ , and $Σ_{c} (2520)$ baryons

T. Aaltonen et al. (CDF Collaboration)

Phys. Rev. D 84, 012003 – Published 13 July 2011

Abstract

We report measurements of the resonance properties of $Λ_{c} (2595)^{+}$ and $Λ_{c} (2625)^{+}$ baryons in their decays to $Λ_{c}^{+} π^{+} π^{-}$ as well as $Σ_{c} (2455)^{++, 0}$ and $Σ_{c} (2520)^{++, 0}$ baryons in their decays to $Λ_{c}^{+} π^{\pm}$ final states. These measurements are performed using data corresponding to $5.2 {fb}^{- 1}$ of integrated luminosity from $p \bar{p}$ collisions at $\sqrt{s} = 1.96 TeV$ , collected with the CDF II detector at the Fermilab Tevatron. Exploiting the largest available charmed baryon sample, we measure masses and decay widths with uncertainties comparable to the world averages for $Σ_{c}$ states, and significantly smaller uncertainties than the world averages for excited $Λ_{c}^{+}$ states.