Measurement of the absolute branching fractions of Λc+ → Ληπ+ and Σ (1385)+η
Journal
Physical Review D
Journal Volume
99
Journal Issue
3
Date Issued
2019
Author(s)
Ablikim, M. et al.
Abstract
We study the decays Λc+→Ληπ+ and Σ(1385)+η based on Λc+Λ̄c- pairs produced in e+e- collisions at a center-of-mass energy of s=4.6 GeV, corresponding to an integrated luminosity of 567 pb-1. The data sample was accumulated with the BESIII detector at the BEPCII collider. The branching fractions are measured to be B(Λc+→Ληπ+)=(1.84±0.21(stat)±0.15(syst))% and B(Λc+→Σ(1385)+η)=(0.91±0.18(stat)±0.09(syst))%, constituting the most precise measurements to date.
Type
journal article