Actions for Study of the Decay Ds+ to K+K-e+nu [electronic resource].

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Study of the Decay Ds+ to K+K-e+nu [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2008.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
8 pages : digital, PDF file
Additional Creators
Stanford Linear Accelerator Center, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Using 214 fb⁻¹ of data recorded by the BABAR detector at the PEPII electron-positron collider, they study the decay D{sub s}⁺ → K⁺K⁻e⁺ν{sub e}. Except for a small S-wave contribution, the events with K⁺K⁻ masses in the range 1.01-1.03 GeV/c² correspond to φ mesons. For D{sub s}⁺ → φe⁺ν{sub e} decays, they measure the relative normalization of the Lorentz invariant form factors at q² = 0, r{sub V} = V(0)/A₁(0) = 1.849 ± 0.060 ± 0.095, r₂ = A₂(0)/A₁(0) = 0.763 ± 0.071 ± 0.065 and the pole mass of the axial-vector form factors m{sub A} = (2.28{sub -0.18}{sup +0.23} ± 0.18) GeV/c². Within the same K⁺K⁻ mass range, they also measure the relative branching fractions Β(D{sub s}⁺ → K⁺K⁻e⁺ν{sub e})/Β(D{sub s}⁺ → K⁺K⁻π⁺) - 0.558 ± 0.007 ± 0.016, from which they obtain the total branching fraction Β(D{sub s}⁺ → φe⁺ν{sub e}) = (2.61 ± 0.03 ± 0.08 ± 0.15) x 10⁻². By comparing this value with the predicted decay rate, they extract A₁(0) = 0.607 ± 0.011 ± 0.019 ± 0.018. The stated uncertainties are statistical, systematic, and from external inputs.
Report Numbers
E 1.99:slac-pub-13294
slac-pub-13294
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Note
Published through SciTech Connect.
07/25/2008.
"slac-pub-13294"
"arXiv:0807.1599"
Physical Review D FT
Brown, D.N.; Lopez, L.; Cahn, R.N.; Lees, J.P.; Abrams, G.S.; Aubert, B.; Bona, M.; Karyotakis, Y.; Poireau, V.; Prudent, X.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Battaglia, M.; Jacobsen, R.G.; Prencipe, E.
Funding Information
AC02-76SF00515
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