Simple decay lepton asymmetries in polarized $e^{+} e^{-} \to t \bar{t}$ and CP violating dipole couplings of the top quark - INSPIRE

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Simple decay lepton asymmetries in polarized $e^{+} e^{-} \to t \bar{t}$ and CP violating dipole couplings of the top quark

Jun, 1996

15 pages

Published in:

Phys.Lett.B 383 (1996) 212-218

e-Print:

hep-ph/9606356 [hep-ph]

DOI:

10.1016/0370-2693(96)00751-4

Report number:

FTUV-96-36,
IFIC-96-44

View in:

ADS Abstract Service

reference search36 citations

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Abstract:

We study two simple

CP

-violating asymmetries of leptons coming from the decay of

t

and \o t in e~+e~- \ra \tt, which do not need the full reconstruction of the

t

or \o t for their measurement. They can arise when the top quark possesses nonzero electric and weak dipole form factors in the couplings to the photon and

Z

, respectively. Together, these two asymmetries can help to determine the electric and weak dipole form factors independently. If longitudinal beam polarization is available, independent determination of form factors can be done by measuring only one of the asymmetries. We obtain estimates of 90\% confidence limits that can be put on these form factors at a future linear \ee collider operating at

\sqrt{s}=500

GeV.

Note:

15 pages, latex, 3 figures as postscript files, uuencoded together with the text. Short version of paper hep-ph/9509299. To appear in Phys. Lett. B Report-no: FTUV/96-36 IFIC/96-44

electron positron: annihilation
annihilation: electron positron
polarization: longitudinal
longitudinal: polarization
top: pair production
pair production: top
top: semileptonic decay
semileptonic decay: top
coupling: top
top: coupling

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