Search for the semileptonic decay Ds+→π0e+νe

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,J H Zou

doi:10.1103/physrevd.106.112004

Abstract

We present the first search for the semileptonic decay Ds+→π0e+νe using a data sample of electron-positron collisions recorded with the BESIII detector at center-of-mass energies between 4.178 and 4.226 GeV, corresponding to an integrated luminosity of 6.32 fb−1. This decay is expected to be sensitive to π0–η mixing. No significant signal is observed. We set an upper limit of 6.4×10−5 on the branching fraction at the 90% confidence level.Received 28 June 2022Accepted 31 October 2022DOI:https://doi.org/10.1103/PhysRevD.106.112004Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBranching fractionHadron mixingLeptonic, semileptonic & radiative decaysRare decaysParticles & Fields

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