Top Quark Properties from Top Pair Events and Decays

TL;DR

This paper reviews recent measurements and searches related to top quark properties at Fermilab Tevatron, focusing on decay characteristics, polarization, and potential signs of new physics, based on data from CDF and Dzero experiments.

Contribution

It presents the most recent and precise measurements of top quark decay properties and searches for rare phenomena, enhancing understanding of top quark behavior and probing for new physics.

Findings

Measured transverse polarization of W bosons from top decays.

Set limits on flavor-changing neutral current decays.

Investigated decays into charged Higgs and invisible channels.

Abstract

Over a decade since the discovery of the top quark we are still trying to unravel mysteries of the heaviest observed particle and learn more about its nature. The continuously accumulating statistics of CDF and Dzero data provide the means for measuring top quark properties with ever greater precision and the opportunity to search for signs of new physics that could be manifested through subtle deviations from the standard model in the production and decays of top quarks. In the following we present a slice of the rich program in top quark physics at the Fermilab Tevatron: measurements of the properties of top quark decays and searches for unusual phenomena in events with pair produced tops. In particular, we discuss the most recent and precise CDF and Dzero measurements of the transverse polarization of W bosons from top decays, branching ratios and searches for flavor-changing neutral current decays, decays into charged Higgs and invisible decays. These analyses correspond to integrated luminosities ranging from 0.9 to 2.7 inv. fb.