FIZIKA B 8 (1999) 3, 429-440

FLAVOUR-CHANGING RADIATIVE TOP QUARK DECAY

SURATH KUMAR BISWAS and V.P.GAUTAM

Theoretical Physics Department, Indian Association for the Cultivation of Science, Jadavpur, Calcutta, 700032, India

Received 14 May 1998; revised manuscript received 16 November 1998
Accepted 1 September 1999

The flavour-changing radiative decay of the t quark has been considered at one loop level in a nonlinear R_x gauge within the standard model and beyond. The electroweak penguin diagrams involving one insertion of the W boson and/or scalar particle have been considered, and we have also calculated the contribution arising from those diagrams using the fourth generation CKM matrix elements.

PACS numbers: 12.15.Ji, 13.20.Jf, 14.65.Ha
UDC 539.126

Keywords: radiative t quark decay, change of flavour, nonlinear R_x gauge, electroweak penguin diagrams, fourth generation CKM matrix

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