Top quark as a resonance

Abstract

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 $\gamma$-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 $\Gamma /m\ll 1$.

8 pages, revtex4, added one section, typos corrected, sync with journal version

References in corpus (7)

• Measurement of the top quark-pair production cross section with ATLAS in pp collisions at $\sqrt{s}=7\TeV$
• First Measurement of the Cross Section for Top-Quark Pair Production in Proton-Proton Collisions at sqrt(s)=7 TeV
• Measurement of the t t-bar production cross section and the top quark mass in the dilepton channel in pp collisions at sqrt(s) =7 TeV
• Measurement of the top quark pair production cross section in pp collisions at sqrt(s) = 7 TeV in dilepton final states with ATLAS
• Pole Mass, Width, and Propagators of Unstable Fermions
• Status and Prospects of Top-Quark Physics
• Fermion resonance in quantum field theory

Cited by in corpus (4)

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• On the polarization of fermion in an intermediate state
• The neutrino propagator in matter and its spin properties
• Neutrino propagation in media and axis of complete polarization