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Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the Ω_{c}^{0} Baryon.
Phys Rev Lett
February 2024
Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
The first observation of the singly Cabibbo-suppressed Ω_{c}^{0}→Ω^{-}K^{+} and Ω_{c}^{0}→Ξ^{-}π^{+} decays is reported, using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb^{-1}, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be B(Ω_{c}^{0}→Ω^{-}K^{+})/B(Ω_{c}^{0}→Ω^{-}π^{+})=[6.
View Article and Find Full Text PDFMeasurement of the Time-Integrated CP Asymmetry in D^{0}→K^{-}K^{+} Decays.
Phys Rev Lett
September 2023
Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
The time-integrated CP asymmetry in the Cabibbo-suppressed decay D^{0}→K^{-}K^{+} is measured using proton-proton collision data, corresponding to an integrated luminosity of 5.7 fb^{-1} collected at a center-of-mass energy of 13 TeV with the LHCb detector. The D^{0} mesons are required to originate from promptly produced D^{*+}→D^{0}π^{+} decays, and the charge of the companion pion is used to determine the flavor of the charm meson at production.
View Article and Find Full Text PDFFirst Measurement of Quasielastic Λ Baryon Production in Muon Antineutrino Interactions in the MicroBooNE Detector.
Phys Rev Lett
June 2023
Brookhaven National Laboratory (BNL), Upton, New York 11973, USA.
We present the first measurement of the cross section of Cabibbo-suppressed Λ baryon production, using data collected with the MicroBooNE detector when exposed to the neutrinos from the main injector beam at the Fermi National Accelerator Laboratory. The data analyzed correspond to 2.2×10^{20} protons on target running in neutrino mode, and 4.
View Article and Find Full Text PDFSearch for CP violation and measurement of branching fractions and decay asymmetry parameters for Λ→Λh and Λ→Σh (h=K,π).
Sci Bull (Beijing)
March 2023
We report a study of Λ→Λh and Λ→Σh (h=K,π) decays based on a data sample of 980fb collected with the Belle detector at the KEKB energy-asymmetric ee collider. The first results of direct CP asymmetry in two-body singly Cabibbo-suppressed (SCS) decays of charmed baryons are measured, A(Λ→ΛK)=+0.021±0.
View Article and Find Full Text PDFObservation of the Singly Cabibbo Suppressed Decay Λ_{c}^{+}→nπ^{+}.
Phys Rev Lett
April 2022
Institute of High Energy Physics, Beijing 100049, People's Republic of China.
The singly Cabibbo-suppressed decay Λ_{c}^{+}→nπ^{+} is observed for the first time with a statistical significance of 7.3σ by using 3.9 fb^{-1} of e^{+}e^{-} collision data collected at center-of-mass energies between 4.
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