Search for oscillations and a measurement of oscillations using events with an inclusively reconstructed vertexThe DELPHI Collaboration
(Received: 6 November 2002 / Revised version: 19 February 2003 / Published online: 31 March 2003 )
Neutral B meson oscillations in the and systems were studied using a sample of about 4.0 million hadronic Z decays recorded by the DELPHI detector between 1992 and 2000. Events with a high transverse momentum lepton were removed and a sample of 770 k events with an inclusively reconstructed vertex was selected. The mass difference between the two physical states in the system was measured to be:
The following limit on the width difference of these states was also obtained:
As no evidence for oscillations was found, a limit on the mass difference of the two physical states was given:
The corresponding sensitivity of this analysis is equal to 6.6 ps -1.
© Società Italiana di Fisica, Springer-Verlag 2003