Search for b→u transitions in B − →DK − and D ∗ K − decays
We report results from an updated study of the suppressed decays B−→DK− and B−→D∗K− followed by D→K+π−, where D(*) indicates a D(*)0 or a ¯¯¯D(*)0 meson, and D∗→Dπ0 or D∗→Dγ. These decays are sensitive to the Cabibbo-Kobayashi-Maskawa unitarity triangle angle γ due to interference between the b→c tr...
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| Hauptverfasser: | , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
11 October 2010
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2010, Jahrgang: 82, Heft: 7, Pages: 1-18 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.82.072006 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.82.072006 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.82.072006 
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| Verfasserangaben: | The BABAR Collaboration |
MARC
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| 245 | 1 | 0 | |a Search for b→u transitions in B − →DK − and D ∗ K − decays |c The BABAR Collaboration |
| 246 | 3 | 3 | |a Search for b→u transitions in B − → DK − and D [ast] K − decays |
| 264 | 1 | |c 11 October 2010 | |
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| 500 | |a Im Titel ist das Minuszeichen und das Tropfensternchen hochgestellt | ||
| 500 | |a Im Titel ist [ast] als Tropfensternchen dargestellt | ||
| 500 | |a BABAR Collaboration: P. del Amo Sanchez, A. Adametz, J. Marks, S. Schenk, U. Uwer, T. Hartmann, T. Leddig, H. Schröder, R. Waldi [und viele weitere] | ||
| 500 | |a Gesehen am 25.08.2023 | ||
| 520 | |a We report results from an updated study of the suppressed decays B−→DK− and B−→D∗K− followed by D→K+π−, where D(*) indicates a D(*)0 or a ¯¯¯D(*)0 meson, and D∗→Dπ0 or D∗→Dγ. These decays are sensitive to the Cabibbo-Kobayashi-Maskawa unitarity triangle angle γ due to interference between the b→c transition B−→D(*)0K− followed by the doubly Cabibbo-suppressed decay D0→K+π−, and the b→u transition B−→¯¯¯D(*)0K− followed by the Cabibbo-favored decay ¯¯¯D0→K+π−. We also report an analysis of the decay B−→D(*)π− with the D decaying into the doubly Cabibbo-suppressed mode D→K+π−. Our results are based on 467×106 Υ(4S)→B¯¯¯B decays collected with the BABAR detector at SLAC. We measure the ratios R(*) of the suppressed ([K+π−]DK−/π−) to favored ([K−π+]DK−/π−) branching fractions as well as the CP asymmetries A(*) of those modes. We see indications of signals for the B−→DK− and B−→D∗Dπ0K− suppressed modes, with statistical significances of 2.1 and 2.2σ, respectively, and we measure: RDK=(1.1±0.6±0.2)×10−2,ADK=−0.86±0.47+0.12−0.16, R∗(Dπ0)K=(1.8±0.9±0.4)×10−2,A∗(Dπ0)K=+0.77±0.35±0.12,R∗(Dγ)K=(1.3±1.4±0.8)×10−2,A∗(Dγ)K=+0.36±0.94+0.25−0.41, where the first uncertainty is statistical and the second is systematic. We use a frequentist approach to obtain the magnitude of the ratio rB≡|A(B−→¯¯¯D0K−)/A(B−→D0K−)|=(9.5+5.1−4.1)%, with rB<16.7% at 90% confidence level. In the case of B−→D∗K− we find r∗B≡|A(B−→¯¯¯D*0K−)/A(B−→D*0K−)|=(9.6+3.5−5.1)%, with r∗B<15.0% at 90% confidence level. | ||
| 700 | 1 | |a Amo Sanchez, Pablo del |e VerfasserIn |0 (DE-588)1164482904 |0 (DE-627)1028916329 |0 (DE-576)510047602 |4 aut | |
| 700 | 1 | |a Adametz, Aleksandra |e VerfasserIn |0 (DE-588)1014430879 |0 (DE-627)705232115 |0 (DE-576)348804202 |4 aut | |
| 700 | 1 | |a Marks, Jörg |e VerfasserIn |0 (DE-588)1155945360 |0 (DE-627)1018501622 |0 (DE-576)168970112 |4 aut | |
| 700 | 1 | |a Schenk, Sebastian |d 1990- |e VerfasserIn |0 (DE-588)1173332219 |0 (DE-627)1042466424 |0 (DE-576)515119296 |4 aut | |
| 700 | 1 | |a Uwer, Ulrich |d 1965- |e VerfasserIn |0 (DE-588)172865387 |0 (DE-627)697794369 |0 (DE-576)133720837 |4 aut | |
| 700 | 1 | |a Hartmann, Thomas |d 1979- |e VerfasserIn |0 (DE-588)1013762266 |0 (DE-627)664666302 |0 (DE-576)34768940X |4 aut | |
| 700 | 1 | |a Leddig, Torsten |d 1984- |e VerfasserIn |0 (DE-588)1030023654 |0 (DE-627)734616821 |0 (DE-576)377844179 |4 aut | |
| 700 | 1 | |a Schröder, Henning |d 1945-2012 |e VerfasserIn |0 (DE-588)141473568 |0 (DE-627)627802990 |0 (DE-576)324038143 |4 aut | |
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