In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2023, No. 9 ( 2023-09-19)
Abstract:
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 $$ {\Lambda}_c^{+} $$ Λ c + → Σ + + hadrons relative to $$ {\Lambda}_c^{+} $$ Λ c + → Σ + π + π − . Combining with the world average branching fraction of $$ {\Lambda}_c^{+} $$ Λ c + → Σ + π + π − , their branching fractions are measured to be (0 . 377 ± 0 . 042 ± 0 . 020 ± 0 . 021)% for $$ {\Lambda}_c^{+} $$ Λ c + → Σ + K + K − , (0 . 200 ± 0 . 023 ± 0 . 011 ± 0 . 011)% for $$ {\Lambda}_c^{+} $$ Λ c + → Σ + K + π − , (0 . 414 ± 0 . 080 ± 0 . 030 ± 0 . 023)% for $$ {\Lambda}_c^{+} $$ Λ c + → Σ + ϕ and (0 . 197 ± 0 . 036 ± 0 . 009 ± 0 . 011)% for $$ {\Lambda}_c^{+} $$ Λ c + → 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 $$ {\Lambda}_c^{+} $$ Λ c + → Σ + π + π − . Since no signal for $$ {\Lambda}_c^{+} $$ Λ c + → 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.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP09(2023)125
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2023
detail.hit.zdb_id:
2027350-2