deletions | additions       diff --git a/kinematics more.tex b/kinematics more.tex  index b8b0472..ee1b967 100644  --- a/kinematics more.tex  +++ b/kinematics more.tex 
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To understand what happens during the decay in the frame of reference of the lab, we need to boost in the beam direction, taken to be in the z-direction. The Lorentz Boost in the z-direction is given by:  \begin{equation}\label{mat:lorenz} \begin{equation}  = \begin{bmatrix}  \gamma & 0 & 0 & - \beta \gamma \\  0 & 1 & 0 & 0 \\