Based on 4.5 fb^-1 of e+e- collision data accumulated at center-of-mass energies between 4599.53 and 4698.82 MeV with the BESIII detector, we measure the absolute branching fraction of the Cabibbo-favored decay Lambda_c+ -> n K0S pi+ with the precision improved by a factor of 2.8 and report the first evidence for the singly-Cabibbo-suppressed decay Lambda_c+ -> n K0S K+. The branching fractions for Lambda_c+ -> n K0S pi+ and Lambda_c+ -> n K0S K+ are determined to be (1.86 +/- 0.08 +/- 0.04) x 10^-2 and (3.9(-1.4)(+1.7) +/- 0.3) x 10^-4, respectively, where the first uncertainties are statistical and the second ones are systematic.
Measurement of branching fractions for Λc+ →n K0S π+ and Λc+ →n K0S K+
Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2024-01-01
Abstract
Based on 4.5 fb^-1 of e+e- collision data accumulated at center-of-mass energies between 4599.53 and 4698.82 MeV with the BESIII detector, we measure the absolute branching fraction of the Cabibbo-favored decay Lambda_c+ -> n K0S pi+ with the precision improved by a factor of 2.8 and report the first evidence for the singly-Cabibbo-suppressed decay Lambda_c+ -> n K0S K+. The branching fractions for Lambda_c+ -> n K0S pi+ and Lambda_c+ -> n K0S K+ are determined to be (1.86 +/- 0.08 +/- 0.04) x 10^-2 and (3.9(-1.4)(+1.7) +/- 0.3) x 10^-4, respectively, where the first uncertainties are statistical and the second ones are systematic.File | Dimensione | Formato | |
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PhysRevD.109.072010.pdf
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