Production of orbitally excited charm mesons in semileptonic B decays

A sample of 3.6 million hadronic Z decays recorded between 1991 and 1995 with the ALEPH detector at LEP is used to investigate semileptonic decays of B mesons into final states involving orbitally excited charm mesons. Topological vertex criteria are used to search for decays involving narrow D** states as well as wide D** resonances and non-resonant D(*)π final states. The sum of the branching ratios for these processes is measured to be

{⤪ Br}({⩈erline {⤪ B}}⌝ghtarrow {⤪ D}≪ ⫑l^{-}{⩈erline v}) + {⤪ Br}({⩈erline {⤪ B}}⌝ghtarrow {⤪ D}^{⇒t}≪ ⫑l^{-}{⩈erline v})↦op =(2.26 pm 0.29({⤪ stat}) pm 0.33({⤪ syst}))%,

which accounts for a significant fraction of the deficit between inclusive measurements and the sum of exclusive semileptonic B decay modes.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
Z0: electroproduction
electroproduction: Z0
Z0: hadronic decay
hadronic decay: Z0
bottom
quark: pair production

References(31)

Figures(0)

On the annihilation constants of mesons consisting of a heavy and a light quark, and $B^0 \leftrightarrow \overline{B}^{-0}$ oscillations

M.B. Voloshin
(
- Moscow, ITEP
)
,
Mikhail A. Shifman
(
- Moscow, ITEP
)

- Sov.J.Nucl.Phys. 45 (1987) 292,
- Yad.Fiz. 45 (1987) 463-466

On Production of d and D* Mesons in B Meson Decays

Mikhail A. Shifman
(
- Moscow, ITEP
)
,
M.B. Voloshin
(
- Moscow, ITEP
)

- Sov.J.Nucl.Phys. 47 (1988) 511,
- Yad.Fiz. 47 (1988) 801-806

Semileptonic B and D Decays in the Quark Model

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

Semileptonic B decays into charmed p wave mesons and the heavy quark symmetry

Pietro Colangelo
(
- INFN, Bari
)
,
Giuseppe Nardulli
(
- INFN, Bari and
- Bari U.
)
,
Nello Paver
(
- Trieste U. and
- INFN, Trieste
)

- Phys.Lett.B 293 (1992) 207-215
•
DOI:
- 10.1016/0370-2693(92)91503-2

Heavy quark symmetry

Matthias Neubert
(
- SLAC
)

- Phys.Rept. 245 (1994) 259-396
•
e-Print:
- hep-ph/9306320
•
DOI:
- 10.1016/0370-1573(94)90091-4

Observation of the D*0 (2459) in e+ e- Annihilation

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 221 (1989) 422-426
•
DOI:
- 10.1016/0370-2693(89)91737-1

Resonance Decomposition of the $D^*$ 0 (2420) Through a Decay Angular Analysis

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 232 (1989) 398-404
•
DOI:
- 10.1016/0370-2693(89)90764-8

Observation of Excited Charmed Mesons

Tagged Photon Spectrometer

Collaboration

•

J.C. Anjos

et al.

- Phys.Rev.Lett. 62 (1989) 1717
•
DOI:
- 10.1103/PhysRevLett.62.1717

$P$ Wave Charmed Mesons in $e^+ e^-$ Annihilation

CLEO

Collaboration

•

P. Avery
(
- Florida U.
)

et al.

- Phys.Rev.D 41 (1990) 774
•
DOI:
- 10.1103/PhysRevD.41.774

Measurement of the Masses and Widths of L=1 Charm Mesons

E687

Collaboration

•

P.L. Frabetti
(
- Bologna U. and
- INFN, Bologna
)

et al.

- Phys.Rev.Lett. 72 (1994) 324-327
•
DOI:
- 10.1103/PhysRevLett.72.324

Production and decay of D $_1$ (2420) $^0$ and D $_2^*$ (2460) $^0$

CLEO

Collaboration

•

P. Avery
(
- Florida U.
)

et al.

- Phys.Lett.B 331 (1994) 236-244,
- Phys.Lett.B 342 (1995) 453-453 (erratum)
•
e-Print:
- hep-ph/9403359
•
DOI:
- 10.1016/0370-2693(94)90968-7

Observation of the Charged Isospin Partner of the $D^*$ 0 (2459)

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 231 (1989) 208-212
•
DOI:
- 10.1016/0370-2693(89)90141-X

Observation of D1+ (2420) and D2*+ (2460)

CLEO

Collaboration

•

T. Bergfeld
(
- Illinois U., Urbana
)

et al.

- Phys.Lett.B 340 (1994) 194-204
•
DOI:
- 10.1016/0370-2693(94)01348-9

Review of particle properties. Particle Data Group

et al.

- Phys.Rev.D 50 (1994) 1173-1823
•
DOI:
- 10.1103/PhysRevD.50.1173

Review of particle physics. Particle Data Group

et al.

- Phys.Rev.D 54 (1996) 1, 1-720
•
DOI:
- 10.1103/PhysRevD.54.1

Mesons in a Relativized Quark Model with Chromodynamics

S. Godfrey
(
- Toronto U.
)
,
Nathan Isgur
(
- Toronto U.
)

- Phys.Rev.D 32 (1985) 189-231,
- Phys. Rev. D32 ( 1985) 189-231
•
DOI:
- 10.1103/PhysRevD.32.189

The Properties of p Wave Mesons with One Heavy Quark

Stephen Godfrey
(
- TRIUMF
)
,
Richard Kokoski
(
- Toronto U.
)

- Phys.Rev.D 43 (1991) 1679-1687
•
DOI:
- 10.1103/PhysRevD.43.1679

The Predictions for the Boson Masses and Widths in the Quark Gluon String Model. Systems of Heavy and Light Quarks

A.B. Kaidalov
(
- Moscow, ITEP
)
,
A.V. Nogteva
(
- Moscow, ITEP
)

- Sov.J.Nucl.Phys. 47 (1988) 321,
- Yad.Fiz. 47 (1988) 505-511,
- Yad. Fiz. 47 (1988) 505-511 and Moscow Inst. Theor. Exp. Phys. - ITEF-87-028 (87,rec.May) 15 p. (707083)