Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-05-27
Phys.Rev.Lett.105:201802,2010
Physics
High Energy Physics
High Energy Physics - Experiment
13 pages, 2 figures, 2 tables. v2: text added for clarification, version published in Phys. Rev. Letters
Scientific paper
10.1103/PhysRevLett.105.201802
We have made the first observation of Bs->Ds(*)+Ds(*)- decays using 23.6 fb-1 of data recorded by the Belle experiment running on the Upsilon(5S) resonance. The branching fractions are measured to be B(B^0_s\ra D^+_s D^-_s) = (1.0\,^{+0.4}_{-0.3}\,^{+0.3}_{-0.2})%, B(B^0_s\ra D^{*\pm}_s D^{\mp}_s) = (2.8\,^{+0.8}_{-0.7}\,\pm 0.7)%, and B(B^0_s\ra D^{*+}_s D^{*-}_s) = (3.1\,^{+1.2}_{-1.0}\,\pm 0.8)%; the sum is B(B^0_s\ra D^{(*)+}_s D^{(*)-}_s) = (6.9\,^{+1.5}_{-1.3}\,\pm 1.9)%. Assuming Bs->Ds(*)+Ds(*)- saturates decays to CP-even final states, the branching fraction determines the ratio \Delta\Gamma_s/cos(\phi), where \Delta\Gamma_s is the difference in widths between the two Bs-Bsbar mass eigenstates, and \phi is a CP-violating weak phase. Taking CP violation to be negligibly small, we obtain \Delta\Gamma_s/\Gamma_s = 0.147^{+0.036}_{-0.030}(stat.)^{+0.044}_{-0.042}(syst.), where \Gamma_s is the mean decay width.
Adachi Ichiro
Aihara Hiroaki
Arinstein K.
Aulchenko V.
Aushev T.
No associations
LandOfFree
Observation of Bs->Ds(*)+Ds(*)- using e+e- collisions and a determination of the Bs-Bsbar width difference ΔΓ_s does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Observation of Bs->Ds(*)+Ds(*)- using e+e- collisions and a determination of the Bs-Bsbar width difference ΔΓ_s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observation of Bs->Ds(*)+Ds(*)- using e+e- collisions and a determination of the Bs-Bsbar width difference ΔΓ_s will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-15302