The Decay rate asymmetry of the top quark

Grzadkowski, Bohdan; Keung, Wai-Yee

doi:10.1016/0370-2693(93)91761-B

The Decay rate asymmetry of the top quark

Bohdan Grzadkowski
(
- CERN
)
,
Wai-Yee Keung
(
- CERN
)

Jul, 1993

9 pages

Published in:

Phys.Lett.B 319 (1993) 526-532

e-Print:

hep-ph/9310286 [hep-ph]

DOI:

10.1016/0370-2693(93)91761-B

Report number:

CERN-TH-6941-93,
UICHEP-TH-93-15

View in:

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Abstract: (cern)

The asymmetries {\cal A}_k \equiv [\Gamma(\twddec) -\Gamma(\tbwddec)] /[\Gamma(\twddec) + \Gamma(\tbwddec)] in the partial widths of the top quark decays are discussed within the Standard Model (SM), the Two-Higgs-Doublet Model (2HDM) and supersymmetric extensions of the SM (SSM). The leading contributions to these asymmetries in the SM and in the 2HDM are induced by the up-type quark self-energy diagrams and are found to be very small. However, in the SSM, the asymmetry

{\cal A}_b

can be substantial,

{\cal O}(\alpha_{QCD})

, provided the CP-violating phase of gluino-top-stop couplings is not suppressed. Within the SSM

{\cal A}_b

is generated by the vertex corrections.

top
quark: nonleptonic decay
nonleptonic decay: quark
quark: width
decay: asymmetry
asymmetry: decay
grand unified theory
Higgs particle: multiplet
multiplet: Higgs particle
doublet: 2

References(46)

Figures(0)

Production and Decay Properties of Ultraheavy Quarks

Ikaros I.Y. Bigi
(
- SLAC
)
,
Yuri L. Dokshitzer
(
- St. Petersburg, INP
)
,
Valery A. Khoze
(
- St. Petersburg, INP
)
,
Johann H. Kuhn
(
- Munich, Max Planck Inst.
)
,
Peter M. Zerwas
(
- CERN
)

- Phys.Lett.B 181 (1986) 157-163
•
DOI:
- 10.1016/0370-2693(86)91275-X

A Theory of Spontaneous T Violation

T.D. Lee
(
- Columbia U.
)

- Phys.Rev.D 8 (1973) 1226-1239,
- In *Lee, T.D.: Selected papers, vol. 2*, 516-529
•
DOI:
- 10.1103/PhysRevD.8.1226

Unitarity Constraints on {CP} Nonconservation in Higgs Exchange

Steven Weinberg
(
- Texas U.
)

- Phys.Rev.D 42 (1990) 860-866
•
DOI:
- 10.1103/PhysRevD.42.860

CP Violation in the Renormalizable Theory of Weak Interaction

Makoto Kobayashi
(
- Kyoto U.
)
,
Toshihide Maskawa
(
- Kyoto U.
)

- Prog.Theor.Phys. 49 (1973) 652-657,
- Also in *Lichtenberg, D. B. (Ed.), Rosen, S. P. (Ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 218-223.
•
DOI:
- 10.1143/PTP.49.652

CP Noninvariance in the Decays of Heavy Charged Quark Systems

- Phys.Rev.Lett. 43 (1979) 242
•
DOI:
- 10.1103/PhysRevLett.43.242

CP Nonconservation and CPT: A Reassessment of Loop Effects in Charmless B Decays

- Phys.Rev.Lett. 62 (1989) 855
•
DOI:
- 10.1103/PhysRevLett.62.855

Final state interactions and CP violation in weak decays

Lincoln Wolfenstein
(
- Carnegie Mellon U.
)

- Phys.Rev.D 43 (1991) 151-156
•
DOI:
- 10.1103/PhysRevD.43.151

CP violation in inclusive and exclusive charmless B decays

Jean-Marc Gerard
(
- Louvain U.
)
,
Wei-Shu Hou
(
- PSI, Villigen
)

- Phys.Rev.D 43 (1991) 2909-2930
•
DOI:
- 10.1103/PhysRevD.43.2909

On the rate asymmetries in charged B decays

H. Simma
(
- Zurich, ETH
)
,
G. Eilam
(
- Technion
)
,
D. Wyler
(
- Santa Barbara, KITP and
- Zurich U.
)

- Nucl.Phys.B 352 (1991) 367-384
•
DOI:
- 10.1016/0550-3213(91)90447-6

CP asymmetries induced by particle widths: Application to top quark decays

G. Eilam
(
- Michigan State U.
)
,
J.L. Hewett
(
- Wisconsin U., Madison
)
,
A. Soni
(
- Brookhaven
)

- Phys.Rev.Lett. 67 (1991) 1979-1981
•
DOI:
- 10.1103/PhysRevLett.67.1979

Comment on `CP asymmetries induced by particle widths: Application to top quark decays'

J.M. Soares
(
- Carnegie Mellon U.
)

- Phys.Rev.Lett. 68 (1992) 2102
•
DOI:
- 10.1103/PhysRevLett.68.2102

t ---> W+ b ---> tau+ tau-neutrino b decays as a probe of CP violation in the charged Higgs sector

- Phys.Lett.B 289 (1992) 440-448
•
DOI:
- 10.1016/0370-2693(92)91246-6

CP violation in semileptonic top quark decays in the Weinberg model

- Phys.Rev.Lett. 70 (1993) 1364-1367
•
DOI:
- 10.1103/PhysRevLett.70.1364

Final state interaction simulation of T violation in the top quark semileptonic decay

Jiang Liu
(
- Pennsylvania U.
)

- Phys.Rev.D 48 (1993) 212-216
•
e-Print:
- hep-ph/9207271
•
DOI:
- 10.1103/PhysRevD.48.212

Searching for {CP} Violation in Jet Physics

- Phys.Rev.Lett. 58 (1987) 451,
- Phys.Rev.Lett. 60 (1988) 243 (erratum)
•
DOI:
- 10.1103/PhysRevLett.58.451

Signs of a High $q^2$ 'Electric Dipole Moment'

- Phys.Lett.B 212 (1988) 505-510
•
DOI:
- 10.1016/0370-2693(88)91806-0

{CP} Violating Correlations in Electron Positron Annihilation Into $\tau$ Leptons

W. Bernreuther
(
- LBL, Berkeley
)
,
O. Nachtmann
(
- Heidelberg U. and
- SLAC
)

- Phys.Rev.Lett. 63 (1989) 2787,
- Phys.Rev.Lett. 64 (1990) 1072 (erratum),
- LAWRENCE BERKELEY LAB. - LBL-27398 (89,REC.SEP.) 9p,
- Phys. Rev. Lett. 63 (1989) 2787-2790 and Lawrence Berkeley Lab. - LBL-27398 (89,rec.Sep.) 9 p
•
DOI:
- 10.1103/PhysRevLett.63.2787