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Title: | Observation of B0→K*0¯¯¯¯K*0 and Search for B0→K*0K*0 |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 25-Feb-2008 |
Publisher: | American Physical Society |
Abstract: | We report the observation of the b → d penguin-dominated decay B 0 → K * 0 ¯¯¯¯ K * 0 with a sample of 383.2 ± 4.2 million B ¯¯¯ B pairs collected with the BABAR detector at the PEP-II asymmetric-energy e + e − collider at the Stanford Linear Accelerator Center. The measured branching fraction is B ( B 0 → K * 0 ¯¯¯¯ K * 0 ) = [ 1.28 + 0.35 − 0.30 ± 0.11 ] × 10 − 6 and the fraction of longitudinal polarization is f L ( B 0 → K * 0 ¯¯¯¯ K * 0 ) = 0.80 + 0.10 − 0.12 ± 0.06 . The first error quoted is statistical and the second systematic. We also obtain an upper limit at the 90% confidence level on the branching fraction for B ( B 0 → K * 0 K * 0 ) < 0.41 × 10 − 6 . |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.100.081801 |
It is part of: | Physical Review Letters, 2008, vol. 100, num. 8, p. 081801 |
URI: | http://hdl.handle.net/2445/138446 |
Related resource: | https://doi.org/10.1103/PhysRevLett.100.081801 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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