Measurement of the time dependence of B(d)0 <---> anti-B(d)0 mixing using a jet charge technique - INSPIRE

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Measurement of the time dependence of B(d)0 <---> anti-B(d)0 mixing using a jet charge technique

OPAL

Collaboration

Mar, 1994

25 pages

Published in:

Phys.Lett.B 327 (1994) 411-424

DOI:

10.1016/0370-2693(94)90747-1

PDG:

\Delta {\mathit m}_{{{\mathit B}^{0}}}

{\mathit m}_{{{\mathit B}_{{{H}}}^{0}}}-{\mathit m}_{{{\mathit B}_{{{L}}}^{0}}}

Report number:

CERN-PPE-94-43,
CERN-PPE-94-043

Experiments:

CERN-LEP-OPAL

View in:

CERN Document Server

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Abstract: (Elsevier)

The observation and measurement of the time-dependence of B 0 d ↔ B 0 d mixing are described. The B 0 d meson is reconstructed in final states that contain a D ∗− and an ℓ + , where the b flavour of the B 0 d at decay time is tagged by the electric charge of the lepton. A new and efficient method, using a jet charge technique, is developed for identifying the b flavour of the produced B 0 d . From a sample of 556 D ∗± ℓ ∓ candidates reconstructed in the OPAL data collected during 1990–1993, the B 0 d ↔ B 0 d oscillation frequency is measured to be Δm d = 0.508 ± 0.075 (stat) ±0.025(syst) ps −1 giving an oscillation parameter of χ d = 0.73 ± 0.11 (stat) ±0.08 (syst), where 0.076 of the systematic error on χ d arises from the uncertainty on the B 0 d lifetime.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
Z0: electroproduction
electroproduction: Z0
Z0: nonleptonic decay
nonleptonic decay: Z0
B0: electroproduction
electroproduction: B0

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