Inclusive semileptonic branching ratios of b hadrons produced in Z decays - INSPIRE

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Inclusive semileptonic branching ratios of b hadrons produced in Z decays

ALEPH

Collaboration

Jul, 2001

24 pages

Published in:

Eur.Phys.J.C 22 (2002) 613-626

e-Print:

hep-ex/0108007 [hep-ex]

DOI:

10.1007/s100520100851

PDG:

{{\overline{\mathit b}}}

\rightarrow

{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}

Report number:

CERN-EP-2001-057

Experiments:

CERN-LEP-ALEPH

View in:

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Abstract: (arXiv)

A measurement of the inclusive semileptonic branching ratios of b hadrons produced in Z decay is presented, using four million hadronic events collected by the ALEPH detector from 1991 to 1995. Electrons and muons are selected opposite to b-tagged hemispheres. Two different methods are explored to distinguish the contributions from direct \bl and cascade \bcl decays to the total lepton yield. One is based on the lepton transverse momentum spectrum, the other makes use of the correlation between the charge of the lepton and charge estimators built from tracks in the opposite hemisphere of the event. The latter method reduces the dependence on the modelling of semileptonic b decays. The results obtained by averaging the two techniques are BR(b->l) = 0.1070 +- 0.0010 +- 0.0023 +- 0.0026 BR(b->c->l) = 0.0818 +- 0.0015 +- 0.0022 + 0.0022 -0.0014

Note:

24 pages, 7 figures Report-no: CERN-EP/2001-057

electron positron: colliding beams
electron positron: annihilation
Z0: electroproduction
Z0: hadronic decay
bottom
quark: pair production
quark: semileptonic decay
quark: cascade decay
charm
quark: branching ratio

References(25)

Figures(8)

B decay and the Upsilon mass

- Phys.Rev.Lett. 82 (1999) 277-280
•
e-Print:
- hep-ph/9809423
•
DOI:
- 10.1103/PhysRevLett.82.277

B decays in the upsilon expansion

Andre H. Hoang
(
- CERN
)
,
Zoltan Ligeti
(
- Fermilab and
- UC, San Diego
)
,
Aneesh V. Manohar
(
- UC, San Diego
)

- Phys.Rev.D 59 (1999) 074017
•
e-Print:
- hep-ph/9811239
•
DOI:
- 10.1103/PhysRevD.59.074017

Aspects of heavy quark theory

- Ann.Rev.Nucl.Part.Sci. 47 (1997) 591-661
•
e-Print:
- hep-ph/9703290
•
DOI:
- 10.1146/annurev.nucl.47.1.591

Review of particle physics. Particle Data Group

et al.

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

Charm quark mass dependence of QCD corrections to nonleptonic inclusive B decays

Emilio Bagan
(
- Brookhaven
)
,
Patricia Ball
(
- Munich, Tech. U.
)
,
Vladimir M. Braun
(
- Munich, Max Planck Inst.
)
,
P. Gosdzinsky
(
- Barcelona, Autonoma U.
)

- Nucl.Phys.B 432 (1994) 3-38
•
e-Print:
- hep-ph/9408306
•
DOI:
- 10.1016/0550-3213(94)90591-6

Theoretical update of the semileptonic branching ratio of B mesons

E. Bagan
(
- Barcelona, Autonoma U.
)
,
Patricia Ball
(
- Munich, Tech. U.
)
,
Vladimir M. Braun
(
- DESY
)
,
P. Gosdzinsky
(
- Barcelona, Autonoma U.
)

- Phys.Lett.B 342 (1995) 362-368,
- Phys.Lett.B 374 (1996) 363-364 (erratum)
•
e-Print:
- hep-ph/9409440
•
DOI:
- 10.1016/0370-2693(94)01410-E

Next-to-leading order radiative corrections to the decay b ---> c c s

E. Bagan
(
- Barcelona, Autonoma U.
)
,
Patricia Ball
(
- CERN
)
,
B. Fiol
(
- Barcelona, Autonoma U.
)
,
P. Gosdzinsky
(
- Barcelona, Autonoma U.
)

- Phys.Lett.B 351 (1995) 546-554
•
e-Print:
- hep-ph/9502338
•
DOI:
- 10.1016/0370-2693(95)00437-P

Spectator effects in inclusive decays of beauty hadrons

M. Neubert
(
- CERN
)
,
Christopher T. Sachrajda
(
- CERN
)

- Nucl.Phys.B 483 (1997) 339-370
•
e-Print:
- hep-ph/9603202
•
DOI:
- 10.1016/S0550-3213(96)00559-7

ALEPH: A detector for electron-positron annnihilations at LEP

ALEPH

Collaboration

•

D. Decamp
(
- Annecy, LAPP
)

et al.

- Nucl.Instrum.Meth.A 294 (1990) 121-178,
- Nucl.Instrum.Meth.A 303 (1991) 393 (erratum)
•
DOI:
- 10.1016/0168-9002(90)91831-U

The Design, construction and performance of the ALEPH silicon vertex detector

et al.

- Nucl.Instrum.Meth.A 379 (1996) 101-115
•
DOI:
- 10.1016/0168-9002(96)00281-1

Performance of the ALEPH detector at LEP

ALEPH

Collaboration

•

D. Buskulic
(
- Annecy, LAPP
)

et al.

- Nucl.Instrum.Meth.A 360 (1995) 481-506
•
DOI:
- 10.1016/0168-9002(95)00138-7

A Measurement of R(b) using a lifetime mass tag

ALEPH

Collaboration

•

R. Barate
(
- Annecy, LAPP
)

et al.

- Phys.Lett.B 401 (1997) 150-162
•
DOI:
- 10.1016/S0370-2693(97)00406-1

Heavy quark tagging with leptons in the ALEPH detector

ALEPH

Collaboration

•

D. Buskulic
(
- Annecy, LAPP
)

et al.

- Nucl.Instrum.Meth.A 346 (1994) 461-475
•
DOI:
- 10.1016/0168-9002(94)90582-7

Update of electroweak parameters from $Z$ decays

ALEPH

Collaboration

•

D. Buskulic
(
- Annecy, LAPP
)

et al.

- Z.Phys.C 60 (1993) 71-82
•
DOI:
- 10.1007/BF01650432

How to Combine Correlated Estimates of a Single Physical Quantity

- Nucl.Instrum.Meth.A 270 (1988) 110
•
DOI:
- 10.1016/0168-9002(88)90018-6

Scaling Violations in Inclusive e+ e- Annihilation Spectra

- Phys.Rev.D 27 (1983) 105
•
DOI:
- 10.1103/PhysRevD.27.105

Combining heavy flavor electroweak measurements at LEP

ALEPH and
DELPHI and
L3 and
OPAL

Collaborations

- Nucl.Instrum.Meth.A 378 (1996) 101-115

Review of particle physics. Particle Data Group

et al.

- Eur.Phys.J.C 15 (2000) 1-878

The Semileptonic Decays of the D Meson

et al.

- Phys.Rev.Lett. 43 (1979) 1073
•
DOI:
- 10.1103/PhysRevLett.43.1073

A Direct Measurement of Charmed D+ and D0 Semileptonic Branching Ratios

MARK-III

Collaboration

•

R.M. Baltrusaitis

et al.

- Phys.Rev.Lett. 54 (1985) 1976,
- Phys.Rev.Lett. 55 (1985) 638 (erratum)
•
DOI:
- 10.1103/PhysRevLett.54.1976

- Phys.Rev.Lett.D 45 2212

Measurements of semileptonic branching fractions of B mesons at the Upsilon (4S) resonance

CLEO

Collaboration

•

S. Henderson
(
- Harvard U.
)

et al.

- Phys.Rev.D 45 (1992) 2212-2231
•
DOI:
- 10.1103/PhysRevD.45.2212

Measurements of inclusive semileptonic branching fractions of b hadrons in Z0 decays

OPAL

Collaboration

•

G. Abbiendi

et al.

- Eur.Phys.J.C 13 (2000) 225-240
•
e-Print:
- hep-ex/9906041
•
DOI:
- 10.1007/s100520050688

Measurement of R( $b$ ) and Br( $b \to$ lepton neutrino $X$ ) at LEP using double tag methods

L3

Collaboration

•

M. Acciarri

et al.

- Eur.Phys.J.C 13 (2000) 47-61
•
e-Print:
- hep-ex/9909045
•
DOI:
- 10.1007/s100520000296

Measurement of the branching ratios b --> e neutrino X, mu neutrino X, tau-neutrino X and neutrino X

L3

Collaboration

•

M. Acciarri

et al.

- Z.Phys.C 71 (1996) 379-390
•
DOI:
- 10.1007/s002880050184