Study of the decay lambda(c)+ ---> Lambda lepton+ lepton-neutrino - INSPIRE

DataBETA

Study of the decay lambda(c)+ ---> Lambda lepton+ lepton-neutrino

CLEO

Collaboration

Jan, 1994

18 pages

Published in:

Phys.Lett.B 323 (1994) 219-226

e-Print:

hep-ph/9403326 [hep-ph]

DOI:

10.1016/0370-2693(94)90295-X

PDG:

{{\mathit \Lambda}_{{{c}}}^{+}}

\rightarrow

{{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}

Report number:

CLNS-94-1269,
CLEO-94-4

Experiments:

CESR-CLEO

View in:

ADS Abstract Service

reference search67 citations

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Abstract:

Using the CLEO II detector at CESR, we observe 500

\Lambda l~+

pairs consistent with the semileptonic decay

\Lambda_c \to \Lambda l~+ \nu_{l}

. We measure

\sigma (e~+ e~- \to \Lambda_c X) \dot {cal B}(\Lambda_c~+ \to \Lambda l \nu_{l}) =4.77 \pm 0.25 \pm 0.66

pb. Combining with the charm semileptonic width and the lifetime of the

\Lambda_c

, we also obtain

{\cal B}(\Lambda_c \to p K~- \pi~+)

. We find no evidence for

\Lambda l~+ \nu_{l}

final states in which there are additional

\Lambda_c~+

decay products. We measure the decay asymmetry parameter of

\Lambda_c \to \Lambda l~+ \nu_{l}

to be $\alpha_{\Lambda_c} =-0.89\pm{~{0.17}_{0.11}}\pm{~{0.09}_{0.06}}. hardcopies with figures can be obtained upon written request to: Pam Morehouse preprint secretary Newman Lab Cornell University Ithaca, NY 14853 or by sending mail to: preprints@lns62.lns.cornell.edu

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
channel cross section: branching ratio
decay: asymmetry
asymmetry: decay
parity: violation
violation: parity
CLEO

References(19)

Figures(0)

Relationship Between Form-factors in Semileptonic $\bar{B}$ and $D$ Decays and Exclusive Rare $\bar{B}$ Meson Decays

Nathan Isgur
(
- Toronto U.
)
,
Mark B. Wise
(
- Caltech
)

- Phys.Rev.D 42 (1990) 2388-2391
•
DOI:
- 10.1103/PhysRevD.42.2388

On heavy baryon decay form-factors

F. Hussain
(
- Mainz U., Inst. Phys.
)
,
J.G. Korner
(
- Mainz U., Inst. Phys.
)
,
M. Kramer
(
- Mainz U., Inst. Phys.
)
,
George Thompson
(
- Mainz U., Inst. Phys.
)

- Z.Phys.C 51 (1991) 321-328,
- Z. Phys. C51 (1991) 321-327 and Mainz Univ. - MZ-TH 90-28 (90/11,rec.Nov.) 16 p
•
DOI:
- 10.1007/BF01475799

Baryons in the heavy quark effective theory

- Nucl.Phys.B 355 (1991) 38-53
•
DOI:
- 10.1016/0550-3213(91)90301-D

Polarization effects in exclusive semileptonic Lambda(c) and Lambda(b) charm and bottom baryon decays

J.G. Korner
(
- Mainz U., Inst. Phys. and
- DESY
)
,
M. Kramer
(
- Mainz U., Inst. Phys. and
- DESY
)

- Phys.Lett.B 275 (1992) 495-505
•
DOI:
- 10.1016/0370-2693(92)91623-H

The CLEO-II detector

CLEO

Collaboration

•

Y. Kubota
(
- Minnesota U.
)

et al.

- Nucl.Instrum.Meth.A 320 (1992) 66-113
•
DOI:
- 10.1016/0168-9002(92)90770-5

Observables for the Analysis of Event Shapes in e+ e- Annihilation and Other Processes

Geoffrey C. Fox
(
- Caltech
)
,
Stephen Wolfram
(
- Caltech
)

- Phys.Rev.Lett. 41 (1978) 1581
•
DOI:
- 10.1103/PhysRevLett.41.1581

Observation of xi(c)0 semileptonic decay

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 303 (1993) 368-376
•
DOI:
- 10.1016/0370-2693(93)91447-U

Measurement of the Mass and Lifetime of the Charmed Strange Baryon $\Xi(c$ )+

ACCMOR

Collaboration

•

S. Barlag
(
- Munich, Max Planck Inst.
)

et al.

- Phys.Lett.B 233 (1989) 522-529
•
DOI:
- 10.1016/0370-2693(89)91352-X

First Measurement of the Lifetime of the Charmed Strange Baryon Xi( $c$ )0

ACCMOR

Collaboration

•

S. Barlag
(
- Munich, Max Planck Inst.
)

et al.

- Phys.Lett.B 236 (1990) 495-500
•
DOI:
- 10.1016/0370-2693(90)90390-R

Observations of Lambda(charm)+ semileptonic decay

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 269 (1991) 234-242
•
DOI:
- 10.1016/0370-2693(91)91480-J

Observation of Charmed Baryon Production in e+ e- Annihilation

G.S. Abrams
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
M.S. Alam
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
C.A. Blocker
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
A. Boyarski
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
Martin Breidenbach
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)

et al.

- Phys.Rev.Lett. 44 (1980) 10
•
DOI:
- 10.1103/PhysRevLett.44.10

Charm Hadron Properties in 400-GeV/c p p Interactions

LEBC-EHS

Collaboration

•

M. Aguilar-Benitez

et al.

- Z.Phys.C 40 (1988) 321
•
DOI:
- 10.1007/BF01548848

Observation of the Charmed Baryon $\Lambda(c$ ) in $e^+ e^-$ Annihilation at 10-{GeV}

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 207 (1988) 109-114
•
DOI:
- 10.1016/0370-2693(88)90896-9

Measurement of baryon production in B meson decay

CLEO

Collaboration

•

Glen D. Crawford
(
- Ohio State U.
)

et al.

- Phys.Rev.D 45 (1992) 752-770
•
DOI:
- 10.1103/PhysRevD.45.752

Review of particle properties. Particle Data Group

et al.

- Phys.Rev.D 45 (1992) S1,
- Phys.Rev.D 46 (1992) 5210 (erratum)
•
DOI:
- 10.1103/PhysRevD.45.S1

Inclusive production of the charmed baryon Lambda(c) from e+ e- annihilations at s**(1/2) = 10.55-GeV

CLEO

Collaboration

•

P. Avery
(
- Florida U.
)

et al.

- Phys.Rev.D 43 (1991) 3599-3610
•
DOI:
- 10.1103/PhysRevD.43.3599

Measurement of exclusive semileptonic decays of D mesons

CLEO

Collaboration

•

A. Bean
(
- UC, Santa Barbara
)

et al.

- Phys.Lett.B 317 (1993) 647-654
•
DOI:
- 10.1016/0370-2693(93)91385-Z

Measurement of the Lambda(c) decay asymmetry parameter

CLEO

Collaboration

•

P. Avery
(
- Florida U.
)

et al.

- Phys.Rev.Lett. 65 (1990) 2842-2845
•
DOI:
- 10.1103/PhysRevLett.65.2842

A Measurement of asymmetry in the decay lambda(c)+ ---> lambda pi+

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 274 (1992) 239-245
•
DOI:
- 10.1016/0370-2693(92)90529-D