Measurements of K S 0 - K L 0 asymmetries in the decays Λ c + → p K L, S 0, p K L, S 0 π + π − and p K L, S 0 π 0

Journal article

Using e+e− annihilation data sets corresponding to an integrated luminosity of 4.5 fb−1, collected with the BESIII detector at center-of-mass energies between 4.600 and 4.699 GeV, we report the first measurements of the absolute branching fractions BΛc+→pKL0 = (1.67 ± 0.06 ± 0.04)%, BΛc+→pKL0π+π− = (1.69 ± 0.10 ± 0.05)%, and BΛc+→pKL0π0 = (2.02 ± 0.13 ± 0.05)%, where the first uncertainties are statistical and the second systematic. Combining with the known branching fractions of Λc+→pKS0, Λc+→pKS0π+π−, and Λc+→pKS0π0, we present the first measurements of the KS0-KL0 asymmetries RΛc+KS, L0X=BΛc+→KS0X−BΛc+→KL0XBΛc+→KS0X+BΛc+→KL0X in charmed baryon decays: RΛc+pKS, L0=−0.025±0.031, RΛc+pKS, L0π+π−=−0.027±0.048 and RΛc+pKS, L0π0=−0.015±0.046. No significant asymmetries with statistical significance are observed.

Authors: Ablikim, M; Achasov, MN; Adlarson, P; Afedulidis, O; Ai, XC

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2024
• Issue: 9
• Article number: 7
• Publication date: 2024-09-03
• Acceptance date: 2024-08-20
• DOI: 10.1007/jhep09(2024)007
• EISSN: 1029-8479
• Language: English
• Keywords: Charm Physics; e+-e− Experiments