Azimuthal angular dependence of decay lepton in $e^+ e^- \to t \bar{t}$

Y. Kiyo; J. Kodaira; K. Morii

doi:doi:10.1007/s100520000517

EPJ

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2024 Impact factor 4.8

Particles and Fields

Eur. Phys. J. C 18, 327-332
DOI 10.1007/s100520000517

Azimuthal angular dependence of decay lepton in $e^+ e^- \to t \bar{t}$

Y. Kiyo¹ - J. Kodaira² - K. Morii²

¹ Department of Physics, Tohoku University, Sendai 980-8578, Japan
² Department of Physics, Hiroshima University, Higashi-Hiroshima 739-8526, Japan

Received: 11 August 2000 / Published online: 27 November 2000 - © Springer-Verlag 2000

Abstract
We discuss top quark production and its subsequent decay as used for searching new physics at lepton colliders. The angular dependence of the decay leptons is calculated including both QCD corrections and anomalous $\gamma / Z$ - $t \bar{t}$ couplings. The off-diagonal spin basis for the top and anti-top quarks is shown to be useful to probe the anomalous couplings.

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