Exclusive Ds semileptonic branching fraction measurements

J. Hietala, D. Cronin-Hennessy, T. Pedlar, I. Shipsey

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We measure absolute branching fractions for six exclusive Ds semileptonic decays. We use data collected in the CLEO-c detector from e+e- annihilations delivered by the Cornell Electron Storage Ring with a center-of-mass energy near 4170 MeV. We find B(Ds→φeν)=(2.14±0.17±0.08)%, B(Ds→ηeν)=(2.28±0.14±0.19)%, and B(Ds→η′eν)=(0.68±0.15±0.06)% for the largest modes, where the first uncertainties are statistical and the second are systematic. We also obtain B(Ds→K0eν)=(0.39±0.08±0.03)%, B(Ds→K∗eν)=(0.18±0.04±0.01)%, and B(Ds→f0eν,f0→ππ)=(0.13±0.03±0.01)% for f0 masses within 60 MeV of 980 MeV. We use our results to determine the η-η′ and f0 mixing angles with ss¯, and we combine our results with lattice calculations to estimate |Vcs|. This measurement improves upon the Ds semileptonic branching ratio precision and provides a new approach for future work that eliminates the Ds∗ daughter photon reconstruction.

Original languageEnglish (US)
Article number012009
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume92
Issue number1
DOIs
StatePublished - Jul 17 2015

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center of mass
detectors
photons
decay
estimates
electrons
energy

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Exclusive Ds semileptonic branching fraction measurements. / Hietala, J.; Cronin-Hennessy, D.; Pedlar, T.; Shipsey, I.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 92, No. 1, 012009, 17.07.2015.

Research output: Contribution to journalArticle

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abstract = "We measure absolute branching fractions for six exclusive Ds semileptonic decays. We use data collected in the CLEO-c detector from e+e- annihilations delivered by the Cornell Electron Storage Ring with a center-of-mass energy near 4170 MeV. We find B(Ds→φeν)=(2.14±0.17±0.08){\%}, B(Ds→ηeν)=(2.28±0.14±0.19){\%}, and B(Ds→η′eν)=(0.68±0.15±0.06){\%} for the largest modes, where the first uncertainties are statistical and the second are systematic. We also obtain B(Ds→K0eν)=(0.39±0.08±0.03){\%}, B(Ds→K∗eν)=(0.18±0.04±0.01){\%}, and B(Ds→f0eν,f0→ππ)=(0.13±0.03±0.01){\%} for f0 masses within 60 MeV of 980 MeV. We use our results to determine the η-η′ and f0 mixing angles with ss¯, and we combine our results with lattice calculations to estimate |Vcs|. This measurement improves upon the Ds semileptonic branching ratio precision and provides a new approach for future work that eliminates the Ds∗ daughter photon reconstruction.",
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AB - We measure absolute branching fractions for six exclusive Ds semileptonic decays. We use data collected in the CLEO-c detector from e+e- annihilations delivered by the Cornell Electron Storage Ring with a center-of-mass energy near 4170 MeV. We find B(Ds→φeν)=(2.14±0.17±0.08)%, B(Ds→ηeν)=(2.28±0.14±0.19)%, and B(Ds→η′eν)=(0.68±0.15±0.06)% for the largest modes, where the first uncertainties are statistical and the second are systematic. We also obtain B(Ds→K0eν)=(0.39±0.08±0.03)%, B(Ds→K∗eν)=(0.18±0.04±0.01)%, and B(Ds→f0eν,f0→ππ)=(0.13±0.03±0.01)% for f0 masses within 60 MeV of 980 MeV. We use our results to determine the η-η′ and f0 mixing angles with ss¯, and we combine our results with lattice calculations to estimate |Vcs|. This measurement improves upon the Ds semileptonic branching ratio precision and provides a new approach for future work that eliminates the Ds∗ daughter photon reconstruction.

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