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

P U E Onyisi,G Bonvicini,D Cinabro,M J Smith,Ping Zhou,P Naik, J Rademacker, K W Edwards,R A Briere,H Vogel,Jonathan L Rosner,J P Alexander,D G Cassel,S C Das,R Ehrlich, L Gibbons,S W Gray,D L Hartill,B K Heltsley,D L Kreinick,V E Kuznetsov,J R Patterson,Dean E 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 Croninhennessy,J Hietala,S Dobbs,Z Metreveli,K K Seth, A Tomaradze,T Xiao,A Powell,Craig E 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

PHYSICAL REVIEW D（2013）

引用 71|浏览83

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摘要

The branching fractions of D-s(+/-) 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 D-s(+/-) decays in 16 reconstructed final states with a double tag technique. In particular we make a precise measurement of the branching fraction B(D-s -> 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(D-s -> pi(+)pi(0)eta') compared to the world average, and our results bring the inclusively and exclusively measured values of B(D-s -> eta'X) into agreement. We also search for CP-violating asymmetries in D-s decays and measure the cross section of e(+)e(-) -> D-s*D-s at E-cm = 4.17 GeV.

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