The lifetimes of the B-0 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 B-0 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 B-0 and B+ mesons. The third method, used to measure the B-0 lifetime, employed a partial reconstruction technique to identify B-0 --> D*(-)pi(+)X decays. The combined results are tau(0) = 1.55 +/- 0.06 +/- 0.03 ps, tau(+) = 1.58 +/- 0.09 +/- 0.03 ps, tau(+)/tau(0) = 1.03 +/- 0.08 +/- 0.02.

Improved measurement of theB 0 andB + meson lifetimes / Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Coy, C., Lees, J.p., Lucotte, A., Minard, M.n., Odier, P., Pietrzyk, B., Casado, M.p., Chmeissani, M., Crespo, J.m., Delfino, M., Efthymiopoulos, I., Fernandez, E., Fernandezbosman, M., Garrido, L., Juste, A., Martinez, M., et al.. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - STAMPA. - 71:1(1996), pp. 31-44. [10.1007/s002880050145]

Improved measurement of theB 0 andB + meson lifetimes

Creanza D;Gelao G;Iaselli G;Maggi G;
1996

Abstract

The lifetimes of the B-0 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 B-0 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 B-0 and B+ mesons. The third method, used to measure the B-0 lifetime, employed a partial reconstruction technique to identify B-0 --> D*(-)pi(+)X decays. The combined results are tau(0) = 1.55 +/- 0.06 +/- 0.03 ps, tau(+) = 1.58 +/- 0.09 +/- 0.03 ps, tau(+)/tau(0) = 1.03 +/- 0.08 +/- 0.02.
1996
Improved measurement of theB 0 andB + meson lifetimes / Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Coy, C., Lees, J.p., Lucotte, A., Minard, M.n., Odier, P., Pietrzyk, B., Casado, M.p., Chmeissani, M., Crespo, J.m., Delfino, M., Efthymiopoulos, I., Fernandez, E., Fernandezbosman, M., Garrido, L., Juste, A., Martinez, M., et al.. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - STAMPA. - 71:1(1996), pp. 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/11589/3088
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