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arxiv: 1306.5363 · v2 · pith:45SKOC4Lnew · submitted 2013-06-23 · ✦ hep-ex

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

CLEO Collaboration: P. U. E. Onyisi , G. Bonvicini , D. Cinabro , M. J. Smith , P. Zhou , P. Naik , J. Rademacker , K. W. Edwards
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R. A. Briere H. Vogel J. L. Rosner J. P. Alexander D. G. Cassel S. Das R. Ehrlich L. Gibbons S. W. Gray D. L. Hartill B. K. Heltsley D. L. Kreinick V. E. Kuznetsov J. R. Patterson D. Peterson D. Riley A. Ryd A. J. Sadoff X. Shi W. M. Sun J. Yelton P. Rubin N. Lowrey S. Mehrabyan M. Selen J. Wiss J. Libby M. Kornicer R. E. Mitchell D. Besson T. K. Pedlar D. Cronin-Hennessy J. Hietala S. Dobbs Z. Metreveli K. K. Seth A. Tomaradze T. Xiao A. Powell C. Thomas G. Wilkinson D. M. Asner G. Tatishvili J. Y. Ge D. H. Miller I. P. J. Shipsey B. Xin G. S. Adams J. Napolitano K. M. Ecklund J. Insler H. Muramatsu L. J. Pearson E. H. Thorndike M. Artuso S. Blusk R. Mountain T. Skwarnicki S. Stone J. C. Wang L. M. Zhang
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classification ✦ hep-ex
keywords branchingdecaysfractionsabsolutemeasurementmesonagreementasymmetries
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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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  1. Compact $cs\bar{s}\bar{s}$ Tetraquarks in the Charm--Strange Sector: Mass Spectra, Rearrangement Decays and Regge Trajectories with $D_s$ Threshold Inputs

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    The authors compute mass spectra, rearrangement decays, and Regge trajectories for cs s-bar s-bar tetraquarks modeled as axial [cs][s-bar s-bar] systems in a Cornell potential framework with Ds threshold inputs.