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Measurements of the branching fractions for the semileptonic decays Ds+ϕe+νe, ϕμ+νμ, ημ+νμ and ημ+νμ

M. Ablikim et al. (BESIII Collaboration)
Phys. Rev. D 97, 012006 – Published 29 January 2018

Abstract

By analyzing 482pb1 of e+e collision data collected at the center-of-mass energy s=4.009GeV with the BESIII detector, we measure the branching fractions for the semi-leptonic decays Ds+ϕe+νe, ϕμ+νμ, ημ+νμ and ημ+νμ to be B(Ds+ϕe+νe)=(2.26±0.45±0.09)%, B(Ds+ϕμ+νμ)=(1.94±0.53±0.09)%, B(Ds+ημ+νμ)=(2.42±0.46±0.11)% and B(Ds+ημ+νμ)=(1.06±0.54±0.07)%, where the first and second uncertainties are statistical and systematic, respectively. The branching fractions for the three semi-muonic decays Ds+ϕμ+νμ,ημ+νμ and ημ+νμ are determined for the first time and that of Ds+ϕe+νe is consistent with the world average value within uncertainties.

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  • Received 12 September 2017

DOI:https://doi.org/10.1103/PhysRevD.97.012006

Published 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 Society

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Vol. 97, Iss. 1 — 1 January 2018

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