Measurement of the B0s lifetime and study of B0s- oscillations using events
The DELPHI Collaboration
P.Abreu21 - et al.
21 LIP, IST, FCUL - Av. Elias Garcia, 14-1o,
1000 Lisboa Codex, Portugal
Received: 7 February 2000
/ Revised version: 23 March 2000
Published online: 8 June 2000 - © Springer-Verlag 2000
Lifetime and oscillations of B0s mesons have been studied in events with a large transverse momentum lepton and a Ds of opposite electric charge in the same hemisphere, selected from about 3.6 million hadronic Z0decays accumulated by DELPHI between 1992 and 1995.
The B0s lifetime and the fractional width difference between the two physical B0s states have been found to be:
In the latter result it has been assumed that .
Using the same sample, a limit on the mass difference between the physical states has been set:
with a corresponding sensitivity equal to 8.1 ps-1.
Copyright Società Italiana di Fisica, Springer-Verlag 2000