Recent Results on Λc Decays at BESIII

Abstract

As the lightest and most common charmed baryon, the Λc+ plays a key role in our understanding of particles of this type. The BESIII detector has collected a 567 pb-1 sample of e+e- annihilation data near the Λc+ Λc- threshold. Using a double-tag technique, we make absolute measurements of twelve Cabibbo-favored Λc+ hadronic decay modes, including the golden reference mode pK-π+, for which we find B(Λc+ →pK- π+) = (5.84 ± 0.27(stat) ± 0.23(syst))%. We also determine B(Λc+ Λe+νe) = (3.63 ± 0.38(stat) ± 0.20(syst))%. Preliminary results for other final states, including nKSπ+ and Λμνμ, are also presented, along with future prospects.