Measurement of the $B^0$ lifetime and oscillation frequency using $\bar{B}^0 \to D^{*+} \ell^{-}$ anti-neutrino decays

The lifetime and oscillation frequency of the B 0 meson has been measured using B ̄ 0 → D ∗+ ℓ − ν ̄ decays recorded on the Z 0 peak with the OPAL detector at LEP. The D ∗+ → D 0 π + decays were reconstructed using an inclusive technique and the production flavour of the B 0 mesons was determined using a combination of tags from the rest of the event. The results τ B 0 =1.541±0.028±0.023 ps , Δm d =0.497±0.024±0.025 ps −1 were obtained, where in each case the first error is statistical and the second is systematic.

Note:

17 pages, 4 figures, submitted to Phys. Lett. B Report-no: CERN-EP-2000-090

electron positron: colliding beams
electron positron: annihilation
Z0: electroproduction
Z0: hadronic decay
bottom: pair production
anti-B0: semileptonic decay
B0: lifetime
B0 anti-B0: mixing
oscillation: time
B0: mass difference

References(50)

Figures(0)

Review of particle physics. Particle Data Group

et al.

- Eur.Phys.J.C 3 (1998) 1-794
•
DOI:
- 10.1007/s10052-998-0104-x

Lifetimes of charm and beauty hadrons

G. Bellini
(
- Milan U. and
- INFN, Milan
)
,
Ikaros I.Y. Bigi
(
- Notre Dame U.
)
,
P.J. Dornan
(
- Imperial Coll., London
)

- Phys.Rept. 289 (1997) 1-155
•
DOI:
- 10.1016/S0370-1573(97)00005-7

Measurement of the $B^{+}$ and $B^0$ lifetimes and search for CP( $T$ ) violation using reconstructed secondary vertices

OPAL

Collaboration

•

G. Abbiendi

et al.

- Eur.Phys.J.C 12 (2000) 609-626
•
e-Print:
- hep-ex/9901017

Lifetimes of charged and neutral B hadrons using event topology

DELPHI

Collaboration

•

W. Adam

et al.

- Z.Phys.C 68 (1995) 363-374,
- Z. Phys. C68 (1995) 363-374, and CERN Geneva - CERN-PPE-95-059 (95/04,rec.May) 22 p. e: CERN ppe95-059
•
DOI:
- 10.1007/BF01620712

Upper limit on the lifetime difference of shortlived and longlived $B^0_{s}$ mesons

L3

Collaboration

•

M. Acciarri

et al.

- Phys.Lett.B 438 (1998) 417-429
•
DOI:
- 10.1016/S0370-2693(98)01114-9

Measurement of the $B^{+}$ and $B^0$ lifetimes using topological reconstruction of inclusive and semileptonic decays

SLD

Collaboration

•

K. Abe

et al.

- Phys.Rev.Lett. 79 (1997) 590-596
•
DOI:
- 10.1103/PhysRevLett.79.590

A Precise measurement of the B(d)0 meson lifetime using a new technique

DELPHI

Collaboration

•

P. Abreu

et al.

- Z.Phys.C 74 (1997) 19-32,
- Z.Phys.C 75 (1997) 579 (erratum)
•
DOI:
- 10.1007/s002880050367

Determination of |V(cb)| from the semileptonic decay B0 --> D*- lepton - neutrino

DELPHI

Collaboration

•

P. Abreu

et al.

- Z.Phys.C 71 (1996) 539-554
•
DOI:
- 10.1007/s002880050202

Measurement of $B_d^0$ - $\bar{B}_d$ 0 oscillations

DELPHI

Collaboration

•

P. Abreu

et al.

- Z.Phys.C 76 (1997) 579-598
•
DOI:
- 10.1007/s002880050582

- Mod.Phys.Lett.A 11 4173

The OPAL detector at LEP

OPAL

Collaboration

•

K. Ahmet

et al.

- Nucl.Instrum.Meth.A 305 (1991) 275-319
•
DOI:
- 10.1016/0168-9002(91)90547-4

The OPAL silicon microvertex detector

OPAL

Collaboration

•

P.P. Allport
(
- Cambridge U.
)

et al.

- Nucl.Instrum.Meth.A 324 (1993) 34-52
•
DOI:
- 10.1016/0168-9002(93)90964-J

The OPAL silicon strip microvertex detector with two coordinate readout

OPAL

Collaboration

•

P.P. Allport
(
- Cambridge U.
)

et al.

- Nucl.Instrum.Meth.A 346 (1994) 476-495
•
DOI:
- 10.1016/0168-9002(94)90583-5

The extended OPAL silicon strip microvertex detector

OPAL

Collaboration

•

S. Anderson
(
- Indiana U.
)

et al.

- Nucl.Instrum.Meth.A 403 (1998) 326-350
•
DOI:
- 10.1016/S0168-9002(97)01093-0

High-energy physics event generation with PYTHIA 5.7 and JETSET 7.4

Torbjorn Sjostrand
(
- CERN
)

- Comput.Phys.Commun. 82 (1994) 74-90,
- CERN Geneva - TH. 7111 (93/12,rec.Jan.94) 17 p. and e: CERN th-7111-93
•
DOI:
- 10.1016/0010-4655(94)90132-5

A Measurement of R(b) using a double tagging method

OPAL

Collaboration

•

G. Abbiendi

et al.

- Eur.Phys.J.C 8 (1999) 217-239
•
e-Print:
- hep-ex/9810002
•
DOI:
- 10.1007/s100529901087

QCD studies using a cone based jet finding algorithm for $e^{+} e^{-}$ collisions at LEP

OPAL

Collaboration

•

R. Akers

et al.

- Z.Phys.C 63 (1994) 197-212
•
DOI:
- 10.1007/BF01411011

Measurement of gamma (Z0 ---> b anti-b) / gamma (z0 ---> hadrons) using leptons

OPAL

Collaboration

•

P.D. Acton

et al.

- Z.Phys.C 58 (1993) 523-540
•
DOI:
- 10.1007/BF01553012

Measurement of the tau lifetime

OPAL

Collaboration

•

P.D. Acton

et al.

- Z.Phys.C 59 (1993) 183-194
•
DOI:
- 10.1007/BF01566683

Updated measurement of the tau lifetime

OPAL

Collaboration

•

R. Akers

et al.

- Phys.Lett.B 338 (1994) 497-506
•
DOI:
- 10.1016/0370-2693(94)90805-2

A Study of $B$ meson oscillations using dilepton events

OPAL

Collaboration

•

R. Akers

et al.

- Z.Phys.C 66 (1995) 555-565,
- Z. Phys. C66 (1995) 555-565, and CERN Geneva - CERN-PPE-95-012 (95/01,rec.Feb.) 27 p. e: CERN ppe95-012
•
DOI:
- 10.1007/BF01579630