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http://bura.brunel.ac.uk/handle/2438/19582
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DC Field | Value | Language |
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dc.contributor.author | Collaboration, TBABAR | - |
dc.contributor.author | Aubert, B | - |
dc.contributor.author | Kyberd, P | - |
dc.date.accessioned | 2019-11-14T12:21:38Z | - |
dc.date.available | 2003-08-09 | - |
dc.date.available | 2019-11-14T12:21:38Z | - |
dc.date.issued | 2003-08-09 | - |
dc.identifier.citation | ArXiv, 2003, pp. 1 - 22 | en_US |
dc.identifier.issn | 2331-8422 | - |
dc.identifier.uri | https://bura.brunel.ac.uk/handle/2438/19582 | - |
dc.description.abstract | A preliminary measurement of |Vcb| and the branching fraction BR(B0 -> D* l nu_l) has been performed based on a sample of about 55,700 B0 -> D* l nu_l decays recorded with the BaBar detector. The decays are identified in the D* -> D0 pi final state, with the D0 reconstructed in three different decay modes. The differential decay rate is measured as a function of the relativistic boost of the D* in the B0 rest frame. The value of the differential decay rate at `zero recoil', namely the point at which the D* is at rest in the B0 frame, is predicted in Heavy Quark Effective Theory as a kinematic factor times F(1)|Vcb|, where F(1) is the unique form factor governing the decay. We extrapolate the measured differential decay rate to the zero recoil point and obtain F(1)|Vcb|=(34.03+-0.24+-1.31) x 10^-3. Using a theoretical calculation for F(1) we extract |Vcb| = (37.27+-0.26(stat.)+-1.43(syst.)+1.5-1.2(theo.) x 10^-3. From the integrated decay rate we obtain BR(B0 -> D* l nu_l) = (4.68+-0.03+-0.29)%. | en_US |
dc.format.extent | 1 - 22 | - |
dc.language.iso | en | en_US |
dc.publisher | ArXiv | en_US |
dc.title | Measurement of |Vcb| using B0 -> D* l nu_l Decays | en_US |
dc.type | Preprint | en_US |
dc.relation.isPartOf | ArXiv | - |
pubs.publication-status | Published online | - |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
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FullText.pdf | 289.16 kB | Adobe PDF | View/Open |
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