A Search for the Rare Decay of a Charged B Meson Into a Charged K Meson, a Neutrino and an Anti-neutrino /
Author | : Joachim Harnois-Déraps |
Publisher | : |
Total Pages | : 114 |
Release | : 2006 |
ISBN-10 | : OCLC:253891828 |
ISBN-13 | : |
Rating | : 4/5 (28 Downloads) |
Book excerpt: "The document describes a search for the rare decay B[bar] [right arrow] K[bar]vv̄ in a data set of about 230 millions of BB[bar] pairs recorded by the BABAR detector at the PEP-II B Factory, via the process e+e- [right arrow] [Upsilon](4S) [right arrow] BB[bar]. The method used selects events in which the B+ meson is fully reconstructed, and looks for a K[bar] in the rest of the event. This is accomplished by applying kinematical and topological restrictions that select B[bar] [right arrow] K[bar]vv̄ events with the largest possible efficiency, while rejecting a maximum amount of background events. The number of background events is estimated from data and from simulated events, while the value of the selection efficiency relies solely on the simulation of B[bar] [right arrow] K[bar]vv̄ decays in the BABAR detector. These two numbers are required in order to set an upper limit on the branching ratio. We analyze a subset of the data sample and provide an interpretation of the result." --