deletions | additions       diff --git a/Theory.tex b/Theory.tex  index 3f4d92d..0f46bb3 100644  --- a/Theory.tex  +++ b/Theory.tex 
...
The ${\rm t\bar t}$ couplings to the photon and the Z can be parameterized in several ways. In Ref.~\cite{Baer_2013}, for example, the following $F_i$ parameterization is used (with $X = \gamma, Z$):  \begin{equation}  \Gamma_\mu^{ttX} = -ie \left\{ \gamma_\mu \left( F_{1V}^X +\gamma_5 F_{1A}^X \right) + {\sigma_{\mu\nu} \over 2 m_{\rm t}} (p_t + p_{\bar t})_\nu t})^\nu  \left( i F_{2V}^X + \gamma_5 F_{2A}^X \right)\right\}, \end{equation}  with, in the standard model, vanishing $F_2$s and  \begin{eqnarray}