https://doi.org/10.1140/epjc/s10052-012-2094-y
Regular Article - Theoretical Physics
Top quark as a resonance
1
Irkutsk State University, Irkutsk, Russia 664003,
2
Institute for System Dynamics and Control Theory of SB RAS, Irkutsk, Russia 664033,
3
Irkutsk State Technical University, Irkutsk, Russia 664074,
* e-mail: lomov.vl@icc.ru
Received:
6
March
2012
Revised:
1
July
2012
Published online:
4
August
2012
We suggest the description of the dressed fermion propagator with parity non-conservation in the form with separated positive and negative energy poles. We found general form of the γ-matrix off-shell projectors and corresponding resonance factors. The parity violation leads to deviation of resonance factors from the naive Breit–Wigner form and to appearance of non-trivial spin corrections. However, for top quark with SM vertex the resonance factor returns to the standard one due to Γ/m≪1.
© Springer-Verlag / Società Italiana di Fisica, 2012
