Y. X. 逸翔 Yang 杨

Search for the lepton number violation decay ω→π + π + e − e −+c.c.*

M. G. Zhao, M. N. Achasov, P. Adlarson, X. C. 小聪 Ai 艾 et autres

Abstract Lepton number violation decay is searched for via using a data sample of events collected via the BESIII detector at the BEPCII collider. No significant signal is observed, and the upper limit on the branching fraction of at the 90% confidence …

Search for η 1 (1855) in χ cJ → ηηη ′ decays*

M. Ablikim, X. C. 小聪 Ai 艾, R. Aliberti, A. Amoroso et autres

Abstract Based on a sample of events collected by the BESIII detector operating at the BEPCII collider, the decay is analyzed. The decay modes and are observed for the first time, and their corresponding branching fractions are determined to be and . …

Search for the lepton number violation decay ϕ → π + π + e − e − via J/ψ → ϕη *

M. G. Zhao, M. N. Achasov, P. Adlarson, O. Afedulidis et autres

Abstract Using an electron-positron collision data sample corresponding to events collected using the BESIII detector at the BEPCII collider, we firstly search for the lepton number violation decay via . No obviously signals are found. The upper limit on the branching fraction …

Determination of the number of ψ(3686) events taken at BESIII*

M. G. Zhao, M. N. Achasov, P. Adlarson, O. Afedulidis et autres

Abstract The number of ψ (3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×10 6 by counting inclusive ψ (3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the …

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Amplitude analysis of the decays and *

M. G. Zhao, M. N. Achasov, P. Adlarson, O. Afedulidis et autres

Abstract Using annihilation data corresponding to an integrated luminosity of 2.93 taken at the center-of-mass energy GeV with the BESIII detector, a joint amplitude analysis is performed on the decays and (non- η ). The fit fractions of individual components are obtained, …

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