The lifetimes of the B0 and B+ mesons have been measured with the ALEPH detector at LEP, using approximately 3 million hadronic Z decays collected in the period 1991-1994. In the first of three methods, semileptonic decays of B0 and B+ mesons were partially reconstructed by identifying events containing a lepton with an associated D*(-) or (D) over bar(0) meson. The second method used fully reconstructed B0 and B+ mesons. The third method, used to measure the B0 lifetime, employed a partial reconstruction technique to identify B0 --> D*(-)pi(+)X decays. The combined results are tau(B0) = 1.55 +/- 0.06 +/- 0.03 ps, tau(B+) = 1.58 +/- 0.09 +/- 0.03 ps, tau(B+)/tau(B0) = 1.03 +/- 0.08 +/- 0.02.

D., B., I., D., D., D., P., G., C., C., J. P., L., et al. (1996). Improved measurement of the B0 and B+ meson lifetimes. ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS, 71, 31-44 [10.1007/s002880050145].

Improved measurement of the B0 and B+ meson lifetimes

CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1996-01-01

Abstract

The lifetimes of the B0 and B+ mesons have been measured with the ALEPH detector at LEP, using approximately 3 million hadronic Z decays collected in the period 1991-1994. In the first of three methods, semileptonic decays of B0 and B+ mesons were partially reconstructed by identifying events containing a lepton with an associated D*(-) or (D) over bar(0) meson. The second method used fully reconstructed B0 and B+ mesons. The third method, used to measure the B0 lifetime, employed a partial reconstruction technique to identify B0 --> D*(-)pi(+)X decays. The combined results are tau(B0) = 1.55 +/- 0.06 +/- 0.03 ps, tau(B+) = 1.58 +/- 0.09 +/- 0.03 ps, tau(B+)/tau(B0) = 1.03 +/- 0.08 +/- 0.02.
1996
D., B., I., D., D., D., P., G., C., C., J. P., L., et al. (1996). Improved measurement of the B0 and B+ meson lifetimes. ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS, 71, 31-44 [10.1007/s002880050145].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/38917
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