Measurement of branching fractions and CP-violating charge asymmetries for B-meson decays to D(*)¯¯¯D(*), and implications for the Cabibbo-Kobayashi-Maskawa angle γ
We present measurements of the branching fractions and charge asymmetries of B decays to all D ( * ) ¯¯¯ D ( * ) modes. Using 232 × 10 6 B ¯¯¯ B pairs recorded on the Υ ( 4 S ) resonance by the BABAR detector at the e + e − asymmetric B factory PEP-II at the Stanford Linear Accelerator Center, we me...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2006 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/131390 |
| Acceso en línea: | https://hdl.handle.net/2445/131390 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Experiments Violació CP (Física nuclear) Mesons (Física nuclear) Particle physics CP violation (Nuclear physics) Mesons (Nuclear physics) |
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Measurement of branching fractions and CP-violating charge asymmetries for B-meson decays to D(*)¯¯¯D(*), and implications for the Cabibbo-Kobayashi-Maskawa angle γGraugés Pous, EugeniBABAR CollaborationFísica de partículesExperimentsViolació CP (Física nuclear)Mesons (Física nuclear)Particle physicsExperimentsCP violation (Nuclear physics)Mesons (Nuclear physics)We present measurements of the branching fractions and charge asymmetries of B decays to all D ( * ) ¯¯¯ D ( * ) modes. Using 232 × 10 6 B ¯¯¯ B pairs recorded on the Υ ( 4 S ) resonance by the BABAR detector at the e + e − asymmetric B factory PEP-II at the Stanford Linear Accelerator Center, we measure the branching fractions B ( B 0 → D * + D * − ) = ( 8.1 ± 0.6 ± 1.0 ) × 10 − 4 , B ( B 0 → D * ± D ∓ ) = ( 5.7 ± 0.7 ± 0.7 ) × 10 − 4 , B ( B 0 → D + D − ) = ( 2.8 ± 0.4 ± 0.5 ) × 10 − 4 , B ( B + → D * + ¯¯¯ D * 0 ) = ( 8.1 ± 1.2 ± 1.2 ) × 10 − 4 , B ( B + → D * + ¯¯¯ D 0 ) = ( 3.6 ± 0.5 ± 0.4 ) × 10 − 4 , B ( B + → D + ¯¯¯ D * 0 ) = ( 6.3 ± 1.4 ± 1.0 ) × 10 − 4 , and B ( B + → D + ¯¯¯ D 0 ) = ( 3.8 ± 0.6 ± 0.5 ) × 10 − 4 , where in each case the first uncertainty is statistical and the second systematic. We also determine the limits B ( B 0 → D * 0 ¯¯¯ D * 0 ) < 0.9 × 10 − 4 , B ( B 0 → D * 0 ¯¯¯ D 0 ) < 2.9 × 10 − 4 , and B ( B 0 → D 0 ¯¯¯ D 0 ) < 0.6 × 10 − 4 , each at 90% confidence level. All decays above denote either member of a charge-conjugate pair. We also determine the C P -violating charge asymmetries A ( B 0 → D * ± D ∓ ) = 0.03 ± 0.10 ± 0.02 , A ( B + → D * + ¯¯¯ D * 0 ) = − 0.15 ± 0.11 ± 0.02 , A ( B + → D * + ¯¯¯ D 0 ) = − 0.06 ± 0.13 ± 0.02 , A ( B + → D + ¯¯¯ D * 0 ) = 0.13 ± 0.18 ± 0.04 , and A ( B + → D + ¯¯¯ D 0 ) = − 0.13 ± 0.14 ± 0.02 . Additionally, when we combine these results with information from time-dependent C P asymmetries in B 0 → D ( * ) + D ( * ) − decays and world-averaged branching fractions of B decays to D ( * ) s ¯¯¯ D ( * ) modes, we find the Cabibbo-Kobayashi-Maskawa phase γ is favored to lie in the range (0.07-2.77) radians (with a + 0 or + π radians ambiguity) at 68% confidence level.American Physical Society2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/131390Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1103/PhysRevD.73.112004Physical Review D, 2006, vol. 73, num. 11, p. 112004https://doi.org/10.1103/PhysRevD.73.112004(c) American Physical Society, 2006info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1313902026-05-27T06:46:51Z |
| dc.title.none.fl_str_mv |
Measurement of branching fractions and CP-violating charge asymmetries for B-meson decays to D(*)¯¯¯D(*), and implications for the Cabibbo-Kobayashi-Maskawa angle γ |
| title |
Measurement of branching fractions and CP-violating charge asymmetries for B-meson decays to D(*)¯¯¯D(*), and implications for the Cabibbo-Kobayashi-Maskawa angle γ |
| spellingShingle |
Measurement of branching fractions and CP-violating charge asymmetries for B-meson decays to D(*)¯¯¯D(*), and implications for the Cabibbo-Kobayashi-Maskawa angle γ Graugés Pous, Eugeni Física de partícules Experiments Violació CP (Física nuclear) Mesons (Física nuclear) Particle physics Experiments CP violation (Nuclear physics) Mesons (Nuclear physics) |
| title_short |
Measurement of branching fractions and CP-violating charge asymmetries for B-meson decays to D(*)¯¯¯D(*), and implications for the Cabibbo-Kobayashi-Maskawa angle γ |
| title_full |
Measurement of branching fractions and CP-violating charge asymmetries for B-meson decays to D(*)¯¯¯D(*), and implications for the Cabibbo-Kobayashi-Maskawa angle γ |
| title_fullStr |
Measurement of branching fractions and CP-violating charge asymmetries for B-meson decays to D(*)¯¯¯D(*), and implications for the Cabibbo-Kobayashi-Maskawa angle γ |
| title_full_unstemmed |
Measurement of branching fractions and CP-violating charge asymmetries for B-meson decays to D(*)¯¯¯D(*), and implications for the Cabibbo-Kobayashi-Maskawa angle γ |
| title_sort |
Measurement of branching fractions and CP-violating charge asymmetries for B-meson decays to D(*)¯¯¯D(*), and implications for the Cabibbo-Kobayashi-Maskawa angle γ |
| dc.creator.none.fl_str_mv |
Graugés Pous, Eugeni BABAR Collaboration |
| author |
Graugés Pous, Eugeni |
| author_facet |
Graugés Pous, Eugeni BABAR Collaboration |
| author_role |
author |
| author2 |
BABAR Collaboration |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Física de partícules Experiments Violació CP (Física nuclear) Mesons (Física nuclear) Particle physics Experiments CP violation (Nuclear physics) Mesons (Nuclear physics) |
| topic |
Física de partícules Experiments Violació CP (Física nuclear) Mesons (Física nuclear) Particle physics Experiments CP violation (Nuclear physics) Mesons (Nuclear physics) |
| description |
We present measurements of the branching fractions and charge asymmetries of B decays to all D ( * ) ¯¯¯ D ( * ) modes. Using 232 × 10 6 B ¯¯¯ B pairs recorded on the Υ ( 4 S ) resonance by the BABAR detector at the e + e − asymmetric B factory PEP-II at the Stanford Linear Accelerator Center, we measure the branching fractions B ( B 0 → D * + D * − ) = ( 8.1 ± 0.6 ± 1.0 ) × 10 − 4 , B ( B 0 → D * ± D ∓ ) = ( 5.7 ± 0.7 ± 0.7 ) × 10 − 4 , B ( B 0 → D + D − ) = ( 2.8 ± 0.4 ± 0.5 ) × 10 − 4 , B ( B + → D * + ¯¯¯ D * 0 ) = ( 8.1 ± 1.2 ± 1.2 ) × 10 − 4 , B ( B + → D * + ¯¯¯ D 0 ) = ( 3.6 ± 0.5 ± 0.4 ) × 10 − 4 , B ( B + → D + ¯¯¯ D * 0 ) = ( 6.3 ± 1.4 ± 1.0 ) × 10 − 4 , and B ( B + → D + ¯¯¯ D 0 ) = ( 3.8 ± 0.6 ± 0.5 ) × 10 − 4 , where in each case the first uncertainty is statistical and the second systematic. We also determine the limits B ( B 0 → D * 0 ¯¯¯ D * 0 ) < 0.9 × 10 − 4 , B ( B 0 → D * 0 ¯¯¯ D 0 ) < 2.9 × 10 − 4 , and B ( B 0 → D 0 ¯¯¯ D 0 ) < 0.6 × 10 − 4 , each at 90% confidence level. All decays above denote either member of a charge-conjugate pair. We also determine the C P -violating charge asymmetries A ( B 0 → D * ± D ∓ ) = 0.03 ± 0.10 ± 0.02 , A ( B + → D * + ¯¯¯ D * 0 ) = − 0.15 ± 0.11 ± 0.02 , A ( B + → D * + ¯¯¯ D 0 ) = − 0.06 ± 0.13 ± 0.02 , A ( B + → D + ¯¯¯ D * 0 ) = 0.13 ± 0.18 ± 0.04 , and A ( B + → D + ¯¯¯ D 0 ) = − 0.13 ± 0.14 ± 0.02 . Additionally, when we combine these results with information from time-dependent C P asymmetries in B 0 → D ( * ) + D ( * ) − decays and world-averaged branching fractions of B decays to D ( * ) s ¯¯¯ D ( * ) modes, we find the Cabibbo-Kobayashi-Maskawa phase γ is favored to lie in the range (0.07-2.77) radians (with a + 0 or + π radians ambiguity) at 68% confidence level. |
| publishDate |
2006 |
| dc.date.none.fl_str_mv |
2006 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/131390 |
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https://hdl.handle.net/2445/131390 |
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Inglés |
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Inglés |
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Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.73.112004 Physical Review D, 2006, vol. 73, num. 11, p. 112004 https://doi.org/10.1103/PhysRevD.73.112004 |
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(c) American Physical Society, 2006 info:eu-repo/semantics/openAccess |
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(c) American Physical Society, 2006 |
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openAccess |
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American Physical Society |
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American Physical Society |
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Articles publicats en revistes (Física Quàntica i Astrofísica) reponame:Dipòsit Digital de la UB instname:Universidad de Barcelona |
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Universidad de Barcelona |
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