Limit of Energy in Lab Frame

The t quantity is known as the square of the 4-momentum transfer

[math]\displaystyle{ t \equiv \left({\mathbf P_1^*}- {\mathbf P_1^{'*}}\right)^2=\left({\mathbf P_2^{*}}- {\mathbf P_2^{'*}}\right)^2 }[/math]

[math]\displaystyle{ =\mathbf P_1^2-2\mathbf P_1\mathbf P_1^'+\mathbf P_1^{'2} }[/math]

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[math]\displaystyle{ \textbf{\underline{Navigation}} }[/math]

[math]\displaystyle{ \vartriangleleft }[/math] [math]\displaystyle{ \triangle }[/math] [math]\displaystyle{ \vartriangleright }[/math]