2002/07/23 by B. Aubert, The BABAR Collaboration, Aubert, B. +1
Medicine · Physics and Astronomy · #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/0207053
14 Pages, two figures. Submitted to ICHEP 2002 Conference
arxiv created 2002/07/23 · arxiv updated 2009/11/30
We report on the evidence for the decays B0 -> Ds+ pi- and B0 -> Ds- K+ and the results of a search for the decays B0 -> Ds*+ pi- and B0 -> Ds*-K+ from a sample of 84 million Upsilon(4S) decays into B meson pairs collected with the BABAR detector at the PEP II asymmetric-energy e+e- collider. The measured B0 -> Ds+ pi- yield has a probability of less than 10-3 to be a fluctuation of the background and we measure the branching fraction Br(B0 -> Ds+ pi-) = (3.2 +- 0.9 (stat) +- 1.0 (syst)) x 10-5. The measured B0 -> Ds- K+ yield has a probability of less than 5 times 10-4 to be a fluctuation of the background and we measure the branching fraction Br(B0 -> Ds- K+) = (3.2 +- 1.0 (stat) +- 1.0 (syst)) x 10-5. We also set 90% C.L. limits Br(B0 -> Ds*+ pi-)< 4.1 x 10-5 and Br(B0 -> Ds*- K+) < 2.5 x 10-5. All results are preliminary