Measurement of the absolute branching fraction of the inclusive decay $Λ_c^+ \to K_S^0X$
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- Abstract
- We report the first measurement of the absolute branching fraction of the inclusive decay $\Lambda_c^+ \to K_S^0X$. The analysis is performed using an $e^+e^-$ collision data sample corresponding to an integrated luminosity of 567 pb$^{-1}$ taken at $\sqrt{s}$ = 4.6 GeV with the BESIII detector. Using eleven Cabibbo-favored $\bar{\Lambda}_c^-$ decay modes and the double-tag technique, this absolute branching fraction is measured to be $\mathcal{B}(\Lambda_c^+ \to K_S^0X)=(9.9\pm0.6\pm0.4)\%$, where the first uncertainty is statistical and the second systematic. The relative deviation between the branching fractions for the inclusive decay and the observed exclusive decays is $(18.7\pm8.3)\%$, which indicates that there may be some unobserved decay modes with a neutron or excited baryons in the final state.
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- Autoren-URL
- http://arxiv.org/abs/2005.11211v2
- Schlüsselwörter
- hep-ex
- hep-ex
- Notes
- Published in EPJC
- Datum der Veröffentlichung
- 2020
- Herausgeber URL
- http://dx.doi.org/10.1140/epjc/s10052-020-08447-0
- Datum der Datenerfassung
- 2020
- Datum, an dem der Datensatz öffentlich gemacht wurde
- 2020
- Titel
- Measurement of the absolute branching fraction of the inclusive decay $Λ_c^+ \to K_S^0X$
Files
2005.11211v2.pdf
Datenquelle: arXiv
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