The lifetime of the Bs(0) meson is measured in approximately 3 million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1994. Seven different Ds(-) decay modes were reconstructed and combined with an opposite sign lepton as evidence of semileptonic Bs(0) decays. Two hundred and eight D(s)(-)l(+) candidates satisfy selection criteria designed to ensure precise proper time reconstruction and yield a measured Bs(0) lifetime of tau(Bs(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 -> Bs(0))xBr(Bs(0) -> D(s)(-)l(+)nu X) = 0.82 +/- 0.09 (stat)(-0.14)(+0.13) (syst) %.

D., B., D., C., I., D., D., D., P., G., C., G., et al. (1995). Measurement of the Bs(0) Lifetime and Production rate With D-s(-)l(+) Combinations In Z decays. PHYSICS LETTERS. SECTION B, 361(1-4), 221-233 [10.1016/0370-2693(95)01173-N].

Measurement of the Bs(0) Lifetime and Production rate With D-s(-)l(+) Combinations In Z decays

CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1995-01-01

Abstract

The lifetime of the Bs(0) meson is measured in approximately 3 million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1994. Seven different Ds(-) decay modes were reconstructed and combined with an opposite sign lepton as evidence of semileptonic Bs(0) decays. Two hundred and eight D(s)(-)l(+) candidates satisfy selection criteria designed to ensure precise proper time reconstruction and yield a measured Bs(0) lifetime of tau(Bs(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 -> Bs(0))xBr(Bs(0) -> D(s)(-)l(+)nu X) = 0.82 +/- 0.09 (stat)(-0.14)(+0.13) (syst) %.
1995
D., B., D., C., I., D., D., D., P., G., C., G., et al. (1995). Measurement of the Bs(0) Lifetime and Production rate With D-s(-)l(+) Combinations In Z decays. PHYSICS LETTERS. SECTION B, 361(1-4), 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/11365/37513
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