Aubert, Jean-Jacques Coyle, P Leroy, O Schneider, O Search for $B^{0}_{s}s$ oscillations using inclusive lepton events 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. eng 1997

http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=open-99-344; http://cds.cern.ch/record/409015/files/open-99-344.pdf; http://cds.cern.ch/record/409015/files/open-99-344.ps.gz;

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