Measurement of branching fractions of $$ {\Lambda}_{\textrm{c}}^{+} $$ decays to Σ+K+K−, Σ+ϕ and Σ+K+π−(π0)

Journal article

Based on 4.5 fb −1 data taken at seven center-of-mass energies ranging from 4.600 to 4.699 GeV with the BESIII detector at the BEPCII collider, we measure the branching fractions of Λc+ → Σ+ + hadrons relative to Λc+ → Σ+ π + π −. Combining with the world average branching fraction of Λc+ → Σ+ π + π −, their branching fractions are measured to be (0.377 ± 0.042 ± 0.020 ± 0.021)% for Λc+ → Σ+ K + K −, (0.200 ± 0.023 ± 0.011 ± 0.011)% for Λc+ → Σ+ K + π −, (0.414 ± 0.080 ± 0.030 ± 0.023)% for Λc+ → Σ+ ϕ and (0.197 ± 0.036 ± 0.009 ± 0.011)% for Λc+ → Σ+ K + K −(non-ϕ). In all the above results, the first uncertainties are statistical, the second are systematic and the third are from external input of the branching fraction of Λc+ → Σ+ π + π −. Since no signal for Λc+ → Σ+ K + π − π 0 is observed, the upper limit of its branching fraction is determined to be 0.13% at the 90% confidence level. [Figure not available: see fulltext.

Authors: Ablikim, M; Achasov, MN; Adlarson, P; Aliberti, R; Amoroso, A

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2023
• Issue: 9
• Pages: 125
• Publication date: 2023-09-19
• DOI: 10.1007/jhep09(2023)125
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English