Λc+ decays at BESIII. (January 2019)

• Record Type: Journal Article
• Authors: Zhou, Yixiong
• Other Names: collab.
• Is Part Of: Journal of physics. Volume 1137(2018)
• Publication Date: 2019-01
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1137/1/012003
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Based on 567 pb −1 data taken at the center-of-mass energies s = 4.599 GeV with BESIII detector, we report the following results: (a) improved measurements of the relative branching fractions (BFs) for the singly Cabbibo-suppressed decays of Λ c + → p K + K − and Λ c + → p π + π −, (b) the first evidence for the Λ c + → p η is found with 4.2 σ, (c) the most precise upper limit for Λ c + → p π 0, the absolute BFs of the two neutron decay modes Λ c + → Σ − π + π + and Λ c + → Σ − π + π + π 0 are measured with better precision, (d) the measurement of the absolute BFs for the two W-exchange only decays Λ c + → Ξ 0 K + and Λ c + → Ξ ( 1530 ) 0 K +, (e) the significant improved measurement of the absolute BF of the inclusive decay Λ c + → Λ + X, (f) the cross section of e + e − → Λ c + Λ ¯ c − process is measured with unprecedented precision using the data at s = 4.575, 4.580, 4.590 and 4.599 GeV.