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Title: | Measurement of ratios of branching fractions and CP-violating asymmetries of B±→D∗K± decays |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 10-Nov-2008 |
Publisher: | American Physical Society |
Abstract: | We report a study of B ± → D ∗ K ± decays with D ∗ decaying to D π 0 or D γ , using 383 × 10 6 B ¯¯¯ B pairs collected at the Υ ( 4 S ) resonance with the BABAR detector at the SLAC PEP-II B Factory. The D meson decays under study include a non- C P mode ( K ± π ∓ ) , C P -even modes ( K ± K ∓ , π ± π ∓ ) , and C P -odd modes ( K 0 S π 0 , K 0 S ϕ , K 0 S ω ) . We measure ratios ( R ∗ C P ± ) of branching fractions of decays to C P eigenmode states and to flavor-specific states as well as C P asymmetries ( A ∗ C P ± ). These measurements are sensitive to the unitarity triangle angle γ . We obtain A ∗ C P + = − 0.11 ± 0.09 ± 0.01 , R ∗ C P + = 1.31 ± 0.13 ± 0.04 , and A ∗ C P − = 0.06 ± 0.10 ± 0.02 , R ∗ C P − = 1.10 ± 0.12 ± 0.04 , where the first error is statistical and the second error is systematic. Translating our results into an alternative parametrization, widely used for related measurements, we obtain x ∗ + = 0.11 ± 0.06 ± 0.02 and x ∗ − = 0.00 ± 0.06 ± 0.02 . No significant C P -violating charge asymmetry is found in either the flavor-specific mode D → K ± π ∓ or in B ± → D ∗ π ± decays. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.78.092002 |
It is part of: | Physical Review D, 2008, vol. 78, num. 9, p. 092002 |
URI: | http://hdl.handle.net/2445/131495 |
Related resource: | https://doi.org/10.1103/PhysRevD.78.092002 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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