Abstract
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+π+)=(5.55±0.14±0.13)%, where the uncertainties are statistical and systematic, respectively. We find a significantly reduced value of B(Ds→π+π0η ′) compared to the world average, and our results bring the inclusively and exclusively measured values of B(D s→η′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.
Original language | English (US) |
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Article number | 032009 |
Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volume | 88 |
Issue number | 3 |
DOIs | |
State | Published - Aug 20 2013 |