By analyzing 482 pb-1 of e+e- collision data collected at the center-of-mass energy s=4.009 GeV with the BESIII detector, we measure the branching fractions for the semi-leptonic decays Ds+→φe+νe, φμ+νμ, ημ+νμ and η′μ+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+→η′μ+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 η′μ+νμ are determined for the first time and that of Ds+→φe+νe is consistent with the world average value within uncertainties.

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

Farinelli, R.;Garzia, I.;Mezzadri, G.;
2018

Abstract

By analyzing 482 pb-1 of e+e- collision data collected at the center-of-mass energy s=4.009 GeV with the BESIII detector, we measure the branching fractions for the semi-leptonic decays Ds+→φe+νe, φμ+νμ, ημ+νμ and η′μ+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+→η′μ+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 η′μ+νμ are determined for the first time and that of Ds+→φe+νe is consistent with the world average value within uncertainties.
2018
Ablikim, M.; Achasov, M. N.; Ahmed, S.; Albrecht, M.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Ban, Y.; B...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2398056
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