The lifetime of the B-s(0) meson is measured in approximately 3 million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1994. Seven different D-s(-) decay modes were reconstructed and combined with an opposite sign lepton as evidence of semileptonic B-s(0) decays. Two hundred and eight D(s)(-)l(+) candidates satisfy selection criteria designed to ensure precise proper time reconstruction and yield a measured B-s(0) lifetime of tau(B-s(0)) = 1.59(-0.15)(+0.17) (stat) +/-0.03 (syst) ps. Using a larger, less constrained sample of events, the product branching ratio is measured to be Br((b) over bar --> B-s(0)) . Br(B-s(0) --> D(s)(-)l(+)nu X) = 0.82 +/- 0.09 (stat)(-0.14)(+0.13) (syst) %.

Measurement of the Bs 0 lifetime and production rate with Ds -ℓ+ combinations in Z decays / Buskulic, D., Casper, D., de Bonis, 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., Fernandez-Bosman, M., Gaitan, V., Garrido, L.l., Martinez, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 361:1-4(1995), pp. 221-233. [10.1016/0370-2693(95)01173-N]

Measurement of the Bs 0 lifetime and production rate with Ds -ℓ+ combinations in Z decays

Creanza, D.;Gelao, G.;Iaselli, G.;Maggi, G.;
1995

Abstract

The lifetime of the B-s(0) meson is measured in approximately 3 million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1994. Seven different D-s(-) decay modes were reconstructed and combined with an opposite sign lepton as evidence of semileptonic B-s(0) decays. Two hundred and eight D(s)(-)l(+) candidates satisfy selection criteria designed to ensure precise proper time reconstruction and yield a measured B-s(0) lifetime of tau(B-s(0)) = 1.59(-0.15)(+0.17) (stat) +/-0.03 (syst) ps. Using a larger, less constrained sample of events, the product branching ratio is measured to be Br((b) over bar --> B-s(0)) . Br(B-s(0) --> D(s)(-)l(+)nu X) = 0.82 +/- 0.09 (stat)(-0.14)(+0.13) (syst) %.
1995
Measurement of the Bs 0 lifetime and production rate with Ds -ℓ+ combinations in Z decays / Buskulic, D., Casper, D., de Bonis, 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., Fernandez-Bosman, M., Gaitan, V., Garrido, L.l., Martinez, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 361:1-4(1995), pp. 221-233. [10.1016/0370-2693(95)01173-N]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/3038
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