Measurement of the absolute branching fraction of the inclusive decay $$\Lambda _c^+ \rightarrow K_S^0X$$

Journal article

We report the first measurement of the absolute branching fraction of the inclusive decay Lambda c+-> KS0X. The analysis is performed using an e+e- collision data sample corresponding to an integrated luminosity of 567 pb-1 taken at <mml:msqrt>s</mml:msqrt> = 4.6 GeV with the BESIII detector. Using eleven Cabibbo-favored Lambda <overbar></mml:mover>c- decay modes and the double-tag technique, this absolute branching fraction is measured to be B(Lambda c+-> KS0X)=(9.9 +/- 0.6 +/- 0.4)%, 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 +/- 8.3)<mml:mo>%, which indicates that there may be some unobserved decay modes with a neutron or excited baryons in the final state.For complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-020-08447-0

Authors: Ablikim, M; Achasov, MN; Adlarson, P; Ahmed, S; Albrecht, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: SpringerOpen
• Journal: The European Physical Journal C
• Volume: 80
• Issue: 10
• Pages: 935
• Publication date: 2020-10-01
• DOI: 10.1140/epjc/s10052-020-08447-0
• EISSN: 1434-6052
• ISSN: 1434-6044
• Language: English
• Keywords: Branching fraction; Absolute (philosophy); Branching (polymer chemistry)