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Preprint
Report number	CERN-OPEN-99-344
Title	Search for $B^{0}_{s}s$ oscillations using inclusive lepton events
Author(s)	Aubert, Jean-Jacques ; Coyle, P ; Leroy, O ; Schneider, O
Affiliation	(CERN)
Publication	1997
Collaboration	ALEPH Collaboration
Imprint	21 Jul 1997
Number of pages	18
Presented at	International Europhysics Conference on High-Energy Physics, Jerusalem, Israel, 19 - 25 Aug 1997
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LEP ; ALEPH
Abstract	A new search for Bs oscillations is performed in a sample of semileptonic b-hadron decays collected by the ALEPH experiment during 1991-1995. Compared to previous inclusive lepton analyses, the proper time resolution and mistag are significantly improved. In addition sub-samples of the data are assigned an enriched or depleted Bs fraction. Maximum likelihood fits are performed to derive a preliminary lower limit of Dms > 10.2 ps-1 at 95L. Combining with the ALEPH Ds based analyses yields Dms>10.4 ps-1 at 95L.
Submitted by	catherine.cart@cern.ch