Determination of |Vcb| from the semileptonic decay B0 → D*- ℓ+ν
Semileptonic decays B → D*- ℓ+νX were selected from a sample of 3.1 million hadronic Z decays collected by the DELPHI detector at LEP. A topological search for semileptonic B decays to resonant and non-resonant D*- π+ states was performed and the ratio of the branching fractions: Br(B → D*- ℓ+νX)/Br...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1996
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| _version_ | 1826273166589165568 |
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| author | Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, G Alemany, R Allport, P Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, M Antilogus, P Apel, W Arnoud, Y Åsman, B Augustin, J Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbi, M |
| author_facet | Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, G Alemany, R Allport, P Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, M Antilogus, P Apel, W Arnoud, Y Åsman, B Augustin, J Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbi, M |
| author_sort | Abreu, P |
| collection | OXFORD |
| description | Semileptonic decays B → D*- ℓ+νX were selected from a sample of 3.1 million hadronic Z decays collected by the DELPHI detector at LEP. A topological search for semileptonic B decays to resonant and non-resonant D*- π+ states was performed and the ratio of the branching fractions: Br(B → D*- ℓ+νX)/Br(B → D*- ℓ+νX) + Br(B0 → D*- ℓ+ν) = 0.19 ± 0.10(stat) ± 0.06(syst) was determined. Taking into account this contribution, the differential decay width of B0 → D*- ℓ+ν was measured as a function of the momentum transfer from the B to the D*- in two separate analyses, using exclusive and inclusive methods of D*- ℓ+ reconstruction. The distributions were fitted over the full momentum transfer range to extract the product of |V cb| times the normalization of the decay form factor F(q max2): F(qmax2)|Vcb| = (35.4 ± 1.9(stat) ± 2.4(syst)) • 10-3. The value of |Vcb| was computed using theoretical calculations of F(q max2), giving: |Vcb| = (38.9 ± 2.0(stat) ± 2.6(syst) ± 1.7(theory)) • 10-3. The total branching fraction Br(B0 → D*- ℓ+ν) was determined to be: Br(B0 → D*- ℓ+ν) = (5.52 ± 0.17(stat) ± 0.68(syst))%. |
| first_indexed | 2024-03-06T22:24:03Z |
| format | Journal article |
| id | oxford-uuid:560efe12-406b-47c6-bc25-3d4ffaf8ffba |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:24:03Z |
| publishDate | 1996 |
| record_format | dspace |
| spelling | oxford-uuid:560efe12-406b-47c6-bc25-3d4ffaf8ffba2022-03-26T16:47:56ZDetermination of |Vcb| from the semileptonic decay B0 → D*- ℓ+νJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:560efe12-406b-47c6-bc25-3d4ffaf8ffbaEnglishSymplectic Elements at Oxford1996Abreu, PAdam, WAdye, TAgasi, EAjinenko, IAleksan, RAlekseev, GAlemany, RAllport, PAlmehed, SAmaldi, UAmato, SAndreazza, AAndrieux, MAntilogus, PApel, WArnoud, YÅsman, BAugustin, JAugustinus, ABaillon, PBambade, PBarao, FBarate, RBarbi, MSemileptonic decays B → D*- ℓ+νX were selected from a sample of 3.1 million hadronic Z decays collected by the DELPHI detector at LEP. A topological search for semileptonic B decays to resonant and non-resonant D*- π+ states was performed and the ratio of the branching fractions: Br(B → D*- ℓ+νX)/Br(B → D*- ℓ+νX) + Br(B0 → D*- ℓ+ν) = 0.19 ± 0.10(stat) ± 0.06(syst) was determined. Taking into account this contribution, the differential decay width of B0 → D*- ℓ+ν was measured as a function of the momentum transfer from the B to the D*- in two separate analyses, using exclusive and inclusive methods of D*- ℓ+ reconstruction. The distributions were fitted over the full momentum transfer range to extract the product of |V cb| times the normalization of the decay form factor F(q max2): F(qmax2)|Vcb| = (35.4 ± 1.9(stat) ± 2.4(syst)) • 10-3. The value of |Vcb| was computed using theoretical calculations of F(q max2), giving: |Vcb| = (38.9 ± 2.0(stat) ± 2.6(syst) ± 1.7(theory)) • 10-3. The total branching fraction Br(B0 → D*- ℓ+ν) was determined to be: Br(B0 → D*- ℓ+ν) = (5.52 ± 0.17(stat) ± 0.68(syst))%. |
| spellingShingle | Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, G Alemany, R Allport, P Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, M Antilogus, P Apel, W Arnoud, Y Åsman, B Augustin, J Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbi, M Determination of |Vcb| from the semileptonic decay B0 → D*- ℓ+ν |
| title | Determination of |Vcb| from the semileptonic decay B0 → D*- ℓ+ν |
| title_full | Determination of |Vcb| from the semileptonic decay B0 → D*- ℓ+ν |
| title_fullStr | Determination of |Vcb| from the semileptonic decay B0 → D*- ℓ+ν |
| title_full_unstemmed | Determination of |Vcb| from the semileptonic decay B0 → D*- ℓ+ν |
| title_short | Determination of |Vcb| from the semileptonic decay B0 → D*- ℓ+ν |
| title_sort | determination of vcb from the semileptonic decay b0 d l ν |
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