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http://hdl.handle.net/2445/131542
Title: | Improved measurement of CP observables in B±→D0CPK± decays |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 26-Jun-2008 |
Publisher: | American Physical Society |
Abstract: | We present a study of the decay B − → D 0 ( C P ) K − and its charge conjugate, where D 0 ( C P ) is reconstructed in both a non- C P flavor eigenstate and in C P ( C P -even and C P -odd) eigenstates, based on a sample of 382 million Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II e + e − storage ring. We measure the direct C P asymmetries A C P ± and the ratios of the branching fractions R C P ± : A C P + = 0.27 ± 0.09 ( stat ) ± 0.04 ( syst ) , A C P − = − 0.09 ± 0.09 ( stat ) ± 0.02 ( syst ) , R C P + = 1.06 ± 0.10 ( stat ) ± 0.05 ( syst ) , R C P − = 1.03 ± 0.10 ( stat ) ± 0.05 ( syst ) . We also express the results in terms of the so-called Cartesian coordinates x + , x − , and r 2 : x + = − 0.09 ± 0.05 ( stat ) ± 0.02 ( syst ) , x − = 0.10 ± 0.05 ( stat ) ± 0.03 ( syst ) , r 2 = 0.05 ± 0.07 ( stat ) ± 0.03 ( syst ) . These results will help to better constrain the phase parameter γ = arg ( − V u d V ∗ u b / V c d V ∗ c b ) of the Cabibbo-Kobayashi-Maskawa quark mixing matrix. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.77.111102 |
It is part of: | Physical Review D, 2008, vol. 77, num. 11, p. 111102 |
URI: | http://hdl.handle.net/2445/131542 |
Related resource: | https://doi.org/10.1103/PhysRevD.77.111102 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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