From approximately 3 million hadronic decays of Z bosons recorded with the ALEPH detector at LEP, a sample of 410 +/- 32 ($) over bar B-0 --> D*(+)l(-)nu(l) candidates is selected, where l is either an electron or a muon. The differential decay rate d Gamma(($) over bar B-0 --> D*(+)l(-)nu(l))/d omega from this sample is fitted, yielding a value for the product of the CKM matrix element \V-cb\ and the normalisation of the decay form factor at the point of zero recoil of the D*(+) meson F(omega = 1)\V-cb\ = (31.4 +/- 2.3(stat) +/- 2.5(syst)) x 10(-3). A value for \V-cb\ is extracted using theoretical calculations of the form factor normalisation, with the result \V-cb\ = (34.5 +/- 2.5(stat) +/- 2.7(syst) +/- 1.5(theory)) X 10(-3) From the integrated spectrum, the measured branching fraction is Br(($) over bar B-0 --> D*(+)l(-)nu) = (5.18 +/- 0.30(stat) +/- 0.62(syst))%.

A measurement of |Vcb| from B0 → D*+ℓ-νℓ / Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.p., Lucotte, A., Minard, M.n., Odier, P., Pietrzyk, B., Ariztizabal, F., Chmeissani, M., Crespo, J.m., Efthymiopoulos, I., Fernandez, E., Fernandezbosman, M., Gaitan, V., Garrido, L.i., Martinez, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 359:1-2(1995), pp. 236-248. [10.1016/0370-2693(95)01021-H]

A measurement of |Vcb| from B0 → D*+ℓ-νℓ

Creanza, Donato Maria;Gelao, Gennaro;Iaselli, Giuseppe;Maggi, Giorgio Pietro;
1995

Abstract

From approximately 3 million hadronic decays of Z bosons recorded with the ALEPH detector at LEP, a sample of 410 +/- 32 ($) over bar B-0 --> D*(+)l(-)nu(l) candidates is selected, where l is either an electron or a muon. The differential decay rate d Gamma(($) over bar B-0 --> D*(+)l(-)nu(l))/d omega from this sample is fitted, yielding a value for the product of the CKM matrix element \V-cb\ and the normalisation of the decay form factor at the point of zero recoil of the D*(+) meson F(omega = 1)\V-cb\ = (31.4 +/- 2.3(stat) +/- 2.5(syst)) x 10(-3). A value for \V-cb\ is extracted using theoretical calculations of the form factor normalisation, with the result \V-cb\ = (34.5 +/- 2.5(stat) +/- 2.7(syst) +/- 1.5(theory)) X 10(-3) From the integrated spectrum, the measured branching fraction is Br(($) over bar B-0 --> D*(+)l(-)nu) = (5.18 +/- 0.30(stat) +/- 0.62(syst))%.
1995
A measurement of |Vcb| from B0 → D*+ℓ-νℓ / Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.p., Lucotte, A., Minard, M.n., Odier, P., Pietrzyk, B., Ariztizabal, F., Chmeissani, M., Crespo, J.m., Efthymiopoulos, I., Fernandez, E., Fernandezbosman, M., Gaitan, V., Garrido, L.i., Martinez, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 359:1-2(1995), pp. 236-248. [10.1016/0370-2693(95)01021-H]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/1607
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