The charged top-pion production associated with the bottom quark pair as a probe of the topcolor-assisted technicolor model at the LHC

Abstract

The topcolor-assisted technicolor (TC2) model predicts the existence of the charged top-pions ($π_t^\pm$), whose large couplings with the third generation fermions will induce the charged top-pion production associated with the bottom and anti-bottom quark pair at the CERN Large Hadron Collider (LHC) through the parton processes $c\bar b \to π_t^+ b \bar b$ and $u\bar d(c\bar s) \to π_t^+ b \bar b$. In this paper we examine these productions and find that, due to the small Standard Model backgrounds, their production rates can exceed the $3σ$ sensitivity of the LHC in a large part of parameter space, so these processes may serve as a good probe for the TC2 model.

10 pages, 5 figures; negligible changes in the text, notations for curves in Fig. 3a and Fig. 3b changed, references added