Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/135257
Title: | Observation of the Decay B−→D(*)+sK−ℓ−¯νℓ |
Author: | Graugés Pous, Eugeni Garra Ticó, Jordi BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 22-Jul-2011 |
Publisher: | American Physical Society |
Abstract: | We report the observation of the decay B − → D ( * ) + s K − ℓ − ¯ ν ℓ based on 342 fb − 1 of data collected at the Υ ( 4 S ) resonance with the BABAR detector at the PEP-II e + e − storage rings at SLAC. A simultaneous fit to three D + s decay chains is performed to extract the signal yield from measurements of the squared missing mass in the B meson decay. We observe the decay B − → D ( * ) + s K − ℓ − ¯ ν ℓ with a significance greater than 5 standard deviations (including systematic uncertainties) and measure its branching fraction to be B ( B − → D ( * ) + s K − ℓ − ¯ ν ℓ ) = [ 6.13 + 1.04 − 1.03 ( stat ) ± 0.43 ( syst ) ± 0.51 ( B ( D s ) ) ] × 10 − 4 , where the last error reflects the limited knowledge of the D s branching fractions. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.107.041804 |
It is part of: | Physical Review Letters, 2011, vol. 107, num. 4, p. 041804 |
URI: | http://hdl.handle.net/2445/135257 |
Related resource: | https://doi.org/10.1103/PhysRevLett.107.041804 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
602002.pdf | 185.14 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.