Improved Measurement of Absolute Hadronic Branching Fractions of the Ds+ Meson

Improved Measurement of Absolute Hadronic Branching Fractions of the Ds+ Meson

The branching fractions of Ds meson decays serve to normalize many measurements of processes involving charm quarks. Using 586 pb^-1 of e+ e- collisions recorded at a center of mass energy of 4.17 GeV, we determine absolute branching fractions for 13 Ds decays in 16 reconstructed final states with a...

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Bibliographic Details
Main Authors: Collaboration, CLEO, Onyisi, P, Bonvicini, G, Cinabro, D, Smith, M, Zhou, P, Naik, P, Rademacker, J, Edwards, K, Briere, R, Vogel, H, Rosner, J, Alexander, J, Cassel, D, Das, S, Ehrlich, R, Gibbons, L, Gray, S, Hartill, D, Heltsley, B, Kreinick, D, Kuznetsov, V, Patterson, JR, Peterson, D, Riley, D
Format: Journal article
Language:English
Published: 2013
Description
Summary:The branching fractions of Ds meson decays serve to normalize many measurements of processes involving charm quarks. Using 586 pb^-1 of e+ e- collisions recorded at a center of mass energy of 4.17 GeV, we determine absolute branching fractions for 13 Ds decays in 16 reconstructed final states with a double tag technique. In particular we make a precise measurement of the branching fraction B(Ds -> K- K+ pi+) = (5.55 +- 0.14 +- 0.13)%, where the uncertainties are statistical and systematic respectively. We find a significantly reduced value of B(Ds -> pi+ pi0 eta') compared to the world average, and our results bring the inclusively and exclusively measured values of B(Ds -> eta' X)$ into agreement. We also search for CP-violating asymmetries in Ds decays and measure the cross-section of e+ e- -> Ds* Ds at Ecm = 4.17 GeV.

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