Details

Autor(en) / Beteiligte

• Ablikim, M

Titel

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

Ist Teil von

• Physical review. D, 2018-01, Vol.97 (1)

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.