Study of inclusive semileptonic B meson decays

Using the ARGUS detector at the e + e − storage ring DORIS-II, we have measured the inclusive semileptonic decays of B-mesons into electrons and muons. The data originate from 220.5 events/pb on the ϒ(4S) resonance. We find BR (B→e + v e X = (10.3 ± 0.6 ± 0.2)% and BR (B→ μ + v μ X) = (10.0 ± 0.6 ± 0.2)% using the model of Altarelli et al. for extrapolating over all lepton momenta, and BR (B→e + v e X) = (9.9±0.6)%, BR(B→ μ + v μ X) = (9.7±0.6)% using the model of Grinstein et al. For semileptonic decays into baryons, we obtain an upper limit of BR ( B → p e + v X )<0.16%(90% CL ) .

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
Upsilon(10570): electroproduction
electroproduction: Upsilon(10570)
B: semileptonic decay
semileptonic decay: B
decay: inclusive reaction
inclusive reaction: decay

References(13)

Figures(0)

Semileptonic Decay of the B Meson

C. Klopfenstein
(
- SUNY, Stony Brook
)
,
J.E. Horstkotte
(
- SUNY, Stony Brook
)
,
Juliet Lee-Franzini
(
- SUNY, Stony Brook
)
,
R.Dean Schamberger
(
- SUNY, Stony Brook
)
,
M. Sivertz
(
- SUNY, Stony Brook
)

et al.

- Phys.Lett.B 130 (1983) 444
•
DOI:
- 10.1016/0370-2693(83)91540-X

Limit on the B ---> u Coupling from Semileptonic B Decay

CLEO

Collaboration

•

A. Chen
(
- Syracuse U.
)

et al.

- Phys.Rev.Lett. 52 (1984) 1084
•
DOI:
- 10.1103/PhysRevLett.52.1084

Gamma (b ---> u Lepton Neutrino) / gamma (b ---> c Lepton Neutrino) from the End Point of the Lepton Momentum Spectrum in Semileptonic B Decay

CLEO

Collaboration

•

S. Behrends

et al.

- Phys.Rev.Lett. 59 (1987) 407,
- Phys. Rev. Lett. 59 ( 1987) 407-410
•
DOI:
- 10.1103/PhysRevLett.59.407

Observation of B Meson Semileptonic Decays to Noncharmed Final States

CLEO

Collaboration

•

R. Fulton

et al.

- Phys.Rev.Lett. 64 (1990) 16-20,
- Phys. Rev. Lett. 64 (1990) 16-20 and Cornell Univ. Ithaca - CLNS-89-0951 (89,rec.Nov.) 14 p
•
DOI:
- 10.1103/PhysRevLett.64.16

Observation of Semileptonic Charmless B Meson Decays

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 234 (1990) 409-416
•
DOI:
- 10.1016/0370-2693(90)91950-G

The Electron Spectrum From $B$ Meson Decays

Crystal Ball

Collaboration

•

K. Wachs
(
- DESY
)

et al.

- Z.Phys.C 42 (1989) 33
•
DOI:
- 10.1007/BF01565126

ARGUS: A Universal Detector at DORIS-II

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Nucl.Instrum.Meth.A 275 (1989) 1-48,
- NUCL. INSTRUM. METHODS A275 (1989) 1-48 AND HAMBURG DESY - DESY 88-080 (88,REC.JUN.) 117p
•
DOI:
- 10.1016/0168-9002(89)90334-3

Radiative Corrections to Muon Decays With Massive Dirac Neutrinos

P. Kalyniak
(
- TRIUMF and
- British Columbia U.
)
,
John N. Ng
(
- TRIUMF
)

- Phys.Rev.D 25 (1982) 1305
•
DOI:
- 10.1103/PhysRevD.25.1305

Exclusive Semileptonic Decays of Heavy Mesons

- Z.Phys.C 29 (1985) 637
•
DOI:
- 10.1007/BF01560299

Exclusive Semileptonic Decays of Bottom Mesons in the Spectator Quark Model

J.G. Korner
(
- Mainz U., Inst. Phys. and
- DESY
)
,
G.A. Schuler
(
- DESY
)

- Z.Phys.C 38 (1988) 511,
- Z.Phys.C 41 (1989) 690 (erratum)
•
DOI:
- 10.1007/BF01584403

Semileptonic B and D Decays in the Quark Model

- Phys.Rev.D 39 (1989) 799-818
•
DOI:
- 10.1103/PhysRevD.39.799

Leptonic Decay of Heavy Flavors: A Theoretical Update

Guido Altarelli
(
- Rome U. and
- INFN, Rome
)
,
N. Cabibbo
(
- Rome U. and
- INFN, Rome
)
,
G. Corbo
(
- Rome U. and
- INFN, Rome
)
,
L. Maiani
(
- Rome U. and
- INFN, Rome
)
,
G. Martinelli
(
- Frascati
)

- Nucl.Phys.B 208 (1982) 365-380
•
DOI:
- 10.1016/0550-3213(82)90226-7

On the Determination of $V (u b$ ) and $V (c b$ ) From Semileptonic $B$ Decays

C.S. Kim
(
- Durham U.
)
,
Alan D. Martin
(
- Durham U.
)

- Phys.Lett.B 225 (1989) 186-190
•
DOI:
- 10.1016/0370-2693(89)91033-2