Study of the decay asymmetry parameter and CP violation parameter in the Lambda(c)+ ---> Lambda pi+ decay - INSPIRE

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Study of the decay asymmetry parameter and CP violation parameter in the Lambda(c)+ ---> Lambda pi+ decay

FOCUS

Collaboration

•

J.M. Link
(
- UC, Davis
)

Sep, 2005

18 pages

Published in:

Phys.Lett.B 634 (2006) 165-172

e-Print:

hep-ex/0509042 [hep-ex]

DOI:

10.1016/j.physletb.2006.01.017

PDG:

\alpha

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

\rightarrow

{{\mathit \Lambda}}{{\mathit \pi}^{+}}

Report number:

FERMILAB-PUB-05-424-E

Experiments:

FNAL-E-0831

View in:

reference search35 citations

Citations per year

Abstract:

Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter alpha(Lambdac) in Lambdac --> Lambda pi decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter : A = [alpha(Lambdac)+alpha(antiLambda_c)]/[alpha(Lambdac)-alpha(antiLambda_c)]. We obtain alpha(Lambdac)=-0.78+-0.16+-0.13 and A = -0.07+-0.19+-0.12 where errors are statistical and systematic.

photon nucleus: inclusive reaction
beryllium: oxygen
Lambda/c+: photoproduction
Lambda/c+: hadronic decay
mass spectrum: (Lambda pi+)
mass spectrum: (Antilambda pi-)
CP: violation
decay: asymmetry
magnetic spectrometer: experimental results
Batavia TEVATRON PS

References(20)

Figures(0)

Review of particle physics. Particle Data Group

S. Eidelman
(
- Novosibirsk, IYF
)
,
K.G. Hayes
(
- Hillsdale Coll.
)
,
K.A. Olive
(
- Minnesota U.
)
,
M. Aguilar-Benitez
(
- Madrid, CIEMAT
)
,
Claude Amsler
(
- Zurich U.
)

et al.

- Phys.Lett.B 592 (2004) 1-4, 1
•
DOI:
- 10.1016/j.physletb.2004.06.001

Description and Performance of the Fermilab E687 Spectrometer

E-687

Collaboration

•

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

et al.

- Nucl.Instrum.Meth.A 320 (1992) 519-547
•
DOI:
- 10.1016/0168-9002(92)90948-4

A Wide Band Photon Beam at the Fermilab Tevatron to Study Heavy Flavors

P.L. Frabetti
(
- Bologna U. and
- INFN, Bologna
)
,
C.W. Bogart
(
- Colorado U.
)
,
John P. Cumalat
(
- Colorado U.
)
,
S. Culy
(
- Colorado U.
)
,
H. Cheung
(
- Colorado U.
)

et al.

- Nucl.Instrum.Meth.A 329 (1993) 62-78
•
DOI:
- 10.1016/0168-9002(93)90923-6

The Target Silicon Detector for the FOCUS Spectrometer

FOCUS

Collaboration

•

J.M. Link
(
- UC, Davis
)

et al.

- Nucl.Instrum.Meth.A 516 (2004) 364-376
•
e-Print:
- hep-ex/0204023
•
DOI:
- 10.1016/j.nima.2003.08.163

Reconstruction of Vees, Kinks, $\Xi^-$ 's, and $\Omega^-$ 's in the FOCUS Spectrometer

FOCUS

Collaboration

•

J.M. Link
(
- UC, Davis
)

et al.

- Nucl.Instrum.Meth.A 484 (2002) 174-193
•
e-Print:
- hep-ex/0109028
•
DOI:
- 10.1016/S0168-9002(01)02065-4

Cherenkov Particle Identification in FOCUS

FOCUS

Collaboration

•

J.M. Link
(
- UC, Davis
)

et al.

- Nucl.Instrum.Meth.A 484 (2002) 270-286
•
e-Print:
- hep-ex/0108011
•
DOI:
- 10.1016/S0168-9002(01)01975-1

Relations between the Hyperon Polarizations in Associated Production

R. Gatto
(
- LBL, Berkeley
)

- Phys.Rev. 109 (1958) 2, 610-611
•
DOI:
- 10.1103/PhysRev.109.610

Properties of Sigma Decays and the Sigma0 Lifetime

J. Dreitlein
(
- Pennsylvania U.
)
,
H. Primakoff
(
- Pennsylvania U.
)

- Phys.Rev. 125 (1962) 1671-1686
•
DOI:
- 10.1103/PhysRev.125.1671

Study of the Cabibbo Suppressed Decay Modes $D^0 \to \pi^- \pi^+$ and $D^0 \to K^- K^+$

FOCUS

Collaboration

•

J.M. Link
(
- UC, Davis
)

et al.

- Phys.Lett.B 555 (2003) 167-173
•
e-Print:
- hep-ex/0212058
•
DOI:
- 10.1016/S0370-2693(03)00053-4

Measurement of the decay asymmetry parameters in Lambda(c)+ ---> Lambda pi+ and Lambda(c)+ ---> Sigma+ pi0

CLEO

Collaboration

•

M. Bishai
(
- Purdue U.
)

et al.

- Phys.Lett.B 350 (1995) 256-262
•
e-Print:
- hep-ex/9502004
•
DOI:
- 10.1016/0370-2693(95)00280-X

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

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

Exclusive nonleptonic decays of bottom and charm baryons in a relativistic three quark model: Evaluation of nonfactorizing diagrams

Mikhail A. Ivanov
(
- Mainz U., Inst. Phys. and
- Dubna, JINR
)
,
J.G. Korner
(
- Mainz U., Inst. Phys.
)
,
Valery E. Lyubovitskij
(
- Mainz U., Inst. Phys. and
- Dubna, JINR and
- Tomsk State U.
)
,
A.G. Rusetsky
(
- Mainz U., INst. Phys. and
- Dubna, JINR and
- Tbilisi State U.
)

- Phys.Rev.D 57 (1998) 5632-5652
•
e-Print:
- hep-ph/9709372
•
DOI:
- 10.1103/PhysRevD.57.5632

Nonleptonic charmed baryon decays: Symmetry properties of parity violating amplitudes

Piotr Zenczykowski
(
- Cracow, INP
)

- Phys.Rev.D 50 (1994) 5787-5792
•
DOI:
- 10.1103/PhysRevD.50.5787

Quark and pole models of nonleptonic decays of charmed baryons

P. Zenczykowski
(
- Cracow, INP
)

- Phys.Rev.D 50 (1994) 402-411
•
e-Print:
- hep-ph/9309265
•
DOI:
- 10.1103/PhysRevD.50.402

Constituent quark model analysis of weak mesonic decays of charm baryons

- Phys.Rev.D 49 (1994) 3417-3425
•
DOI:
- 10.1103/PhysRevD.49.3417

Cabibbo allowed nonleptonic weak decays of charmed baryons

Hai-Yang Cheng
(
- Taiwan, Inst. Phys. and
- SUNY, Stony Brook
)
,
B. Tseng
(
- Taiwan, Inst. Phys.
)

- Phys.Rev.D 48 (1993) 4188-4202
•
e-Print:
- hep-ph/9304286
•
DOI:
- 10.1103/PhysRevD.48.4188

Nonleptonic weak decays of charmed baryons

- Phys.Rev.D 46 (1992) 1042,
- Phys.Rev.D 55 (1997) 1697 (erratum)
•
DOI:
- 10.1103/PhysRevD.46.1042

Cabibbo favored nonleptonic decays of charmed baryons

Q.P. Xu
(
- Alberta U.
)
,
A.N. Kamal
(
- Alberta U.
)

- Phys.Rev.D 46 (1992) 270-278
•
DOI:
- 10.1103/PhysRevD.46.270

Exclusive nonleptonic charm baryon decays

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

- Z.Phys.C 55 (1992) 659-670
•
DOI:
- 10.1007/BF01561305