A search for B-s(0) oscillations is performed using a sample of semileptonic b-hadron decays collected by the ALEPH experiment during 1991-95. Compared to previous inclusive lepton analyses, the proper time resolution and b-flavour mistag rate are significantly improved. Additional sensitivity to B-s(0) mixing is obtained by identifying subsamples of events having a B-s(0) purity which is higher than the average for the whole data sample. Unbinned maximum likelihood amplitude fits are performed to derive a lower limit of Delta m(s) > 9.5 ps(-1) at the 95% confidence limit (95% CL). Combining with the ALEPH D-s(-)-based analyses yields Delta m(s) > 9.6 ps(-1) at 95% CL.

R., B., D., B., D., D., P., G., C., G., J. P., L., et al. (1999). Search for B-s(0) oscillations using inclusive lepton events. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 7(4), 553-569 [10.1007/s100520050429].

Search for B-s(0) oscillations using inclusive lepton events

CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1999-01-01

Abstract

A search for B-s(0) oscillations is performed using a sample of semileptonic b-hadron decays collected by the ALEPH experiment during 1991-95. Compared to previous inclusive lepton analyses, the proper time resolution and b-flavour mistag rate are significantly improved. Additional sensitivity to B-s(0) mixing is obtained by identifying subsamples of events having a B-s(0) purity which is higher than the average for the whole data sample. Unbinned maximum likelihood amplitude fits are performed to derive a lower limit of Delta m(s) > 9.5 ps(-1) at the 95% confidence limit (95% CL). Combining with the ALEPH D-s(-)-based analyses yields Delta m(s) > 9.6 ps(-1) at 95% CL.
1999
R., B., D., B., D., D., P., G., C., G., J. P., L., et al. (1999). Search for B-s(0) oscillations using inclusive lepton events. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 7(4), 553-569 [10.1007/s100520050429].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/37907
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