Measurement of |Vcb| using the semileptonic decay B d 0 → D*+ℓ-ν ℓ
Data from Z decays in DELPHI have been searched for Bd0 → D*+ℓ-νℓ with the D*+ decaying to D0π+ and D0 → K-π+, K-π +π+π- or K-π +(π0). These events are used to measure the CKM matrix element |Vcb| and the form factor slope, ρA12: ℱD* (1) |Vcb| = 0.0392 ± 0.0018 ± 0.0023; ρA12 = 1.32 ± 0.15 ± 0.33 co...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| 格式: | Journal article |
| 語言: | English |
| 出版: |
2004
|
| _version_ | 1826285897165832192 |
|---|---|
| author | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alderweireld, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, E Augustinus, A Baillon, P Ballestrero, A |
| author_facet | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alderweireld, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, E Augustinus, A Baillon, P Ballestrero, A |
| author_sort | Abdallah, J |
| collection | OXFORD |
| description | Data from Z decays in DELPHI have been searched for Bd0 → D*+ℓ-νℓ with the D*+ decaying to D0π+ and D0 → K-π+, K-π +π+π- or K-π +(π0). These events are used to measure the CKM matrix element |Vcb| and the form factor slope, ρA12: ℱD* (1) |Vcb| = 0.0392 ± 0.0018 ± 0.0023; ρA12 = 1.32 ± 0.15 ± 0.33 corresponding to a branching fraction: BR(Bd0 → D*+ℓ-νℓ) = (5.90 ± 0.22 ± 0.50)%. Combining these and previous DELPHI measurements gives: ℱD* (1) |Vcb| = 0.0377 ± 0.0011 ± 0.0019, ρA12 = 1.39 ± 0.10 ± 0.33 and BR(Bd0 → D* +ℓ-νℓ) = (5.39 ± 0.11 ± 0.34)% Using ℱD* (1) = 0.91 ± 0.04, yields: |Vcbl = 0.0414 ± 0.0012(stat.) ± 0.0021(syst.) ± 0.0018(theory). The b-quark semileptonic branching fraction into a D*+ emitted from higher mass charmed excited states has also been measured to be: BR(b → D*+Xℓ-ν ℓ) = (0.67 ± 0.08 ± 0.10)%. |
| first_indexed | 2024-03-07T01:35:43Z |
| format | Journal article |
| id | oxford-uuid:951e0dfe-3443-4c5a-bfbc-704ad59f185c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:35:43Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:951e0dfe-3443-4c5a-bfbc-704ad59f185c2022-03-26T23:44:01ZMeasurement of |Vcb| using the semileptonic decay B d 0 → D*+ℓ-ν ℓ Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:951e0dfe-3443-4c5a-bfbc-704ad59f185cEnglishSymplectic Elements at Oxford2004Abdallah, JAbreu, PAdam, WAdzic, PAlbrecht, TAlderweireld, TAlemany-Fernandez, RAllmendinger, TAllport, PAmaldi, UAmapane, NAmato, SAnashkin, EAndreazza, AAndringa, SAnjos, NAntilogus, PApel, WArnoud, YAsk, SAsman, BAugustin, EAugustinus, ABaillon, PBallestrero, AData from Z decays in DELPHI have been searched for Bd0 → D*+ℓ-νℓ with the D*+ decaying to D0π+ and D0 → K-π+, K-π +π+π- or K-π +(π0). These events are used to measure the CKM matrix element |Vcb| and the form factor slope, ρA12: ℱD* (1) |Vcb| = 0.0392 ± 0.0018 ± 0.0023; ρA12 = 1.32 ± 0.15 ± 0.33 corresponding to a branching fraction: BR(Bd0 → D*+ℓ-νℓ) = (5.90 ± 0.22 ± 0.50)%. Combining these and previous DELPHI measurements gives: ℱD* (1) |Vcb| = 0.0377 ± 0.0011 ± 0.0019, ρA12 = 1.39 ± 0.10 ± 0.33 and BR(Bd0 → D* +ℓ-νℓ) = (5.39 ± 0.11 ± 0.34)% Using ℱD* (1) = 0.91 ± 0.04, yields: |Vcbl = 0.0414 ± 0.0012(stat.) ± 0.0021(syst.) ± 0.0018(theory). The b-quark semileptonic branching fraction into a D*+ emitted from higher mass charmed excited states has also been measured to be: BR(b → D*+Xℓ-ν ℓ) = (0.67 ± 0.08 ± 0.10)%. |
| spellingShingle | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alderweireld, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, E Augustinus, A Baillon, P Ballestrero, A Measurement of |Vcb| using the semileptonic decay B d 0 → D*+ℓ-ν ℓ |
| title | Measurement of |Vcb| using the semileptonic decay B d
0 → D*+ℓ-ν ℓ
|
| title_full | Measurement of |Vcb| using the semileptonic decay B d
0 → D*+ℓ-ν ℓ
|
| title_fullStr | Measurement of |Vcb| using the semileptonic decay B d
0 → D*+ℓ-ν ℓ
|
| title_full_unstemmed | Measurement of |Vcb| using the semileptonic decay B d
0 → D*+ℓ-ν ℓ
|
| title_short | Measurement of |Vcb| using the semileptonic decay B d
0 → D*+ℓ-ν ℓ
|
| title_sort | measurement of vcb using the semileptonic decay b d 0 d l ν l |
| work_keys_str_mv | AT abdallahj measurementofvcbusingthesemileptonicdecaybd0dlnl AT abreup measurementofvcbusingthesemileptonicdecaybd0dlnl AT adamw measurementofvcbusingthesemileptonicdecaybd0dlnl AT adzicp measurementofvcbusingthesemileptonicdecaybd0dlnl AT albrechtt measurementofvcbusingthesemileptonicdecaybd0dlnl AT alderweireldt measurementofvcbusingthesemileptonicdecaybd0dlnl AT alemanyfernandezr measurementofvcbusingthesemileptonicdecaybd0dlnl AT allmendingert measurementofvcbusingthesemileptonicdecaybd0dlnl AT allportp measurementofvcbusingthesemileptonicdecaybd0dlnl AT amaldiu measurementofvcbusingthesemileptonicdecaybd0dlnl AT amapanen measurementofvcbusingthesemileptonicdecaybd0dlnl AT amatos measurementofvcbusingthesemileptonicdecaybd0dlnl AT anashkine measurementofvcbusingthesemileptonicdecaybd0dlnl AT andreazzaa measurementofvcbusingthesemileptonicdecaybd0dlnl AT andringas measurementofvcbusingthesemileptonicdecaybd0dlnl AT anjosn measurementofvcbusingthesemileptonicdecaybd0dlnl AT antilogusp measurementofvcbusingthesemileptonicdecaybd0dlnl AT apelw measurementofvcbusingthesemileptonicdecaybd0dlnl AT arnoudy measurementofvcbusingthesemileptonicdecaybd0dlnl AT asks measurementofvcbusingthesemileptonicdecaybd0dlnl AT asmanb measurementofvcbusingthesemileptonicdecaybd0dlnl AT augustine measurementofvcbusingthesemileptonicdecaybd0dlnl AT augustinusa measurementofvcbusingthesemileptonicdecaybd0dlnl AT baillonp measurementofvcbusingthesemileptonicdecaybd0dlnl AT ballestreroa measurementofvcbusingthesemileptonicdecaybd0dlnl |