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If anyone is familiar with the calculation of scattering amplitudes using momentum twistors. I am working through the book "Scattering Amplitudes in Gauge Theory and Gravity" by Elvang and Huang.
I am completely stumped by one step that should be simple. My question is about Eq. (5.45). My question is on the last step, which is
[tex] \biggl( |i \rangle^{\dot{b}} ~\langle i-1|_{\dot{a}} ~ - ~ |i-1 \rangle^{\dot{b}} \, \langle i |_{\dot{a}} \biggr) y_i^{\dot{a} a} = \langle i-1, i \rangle \, y_i^{\dot{b}a} [/tex]
I am stumped, conservation of momentum or the Schouten identity does not help here.
I can provide more details with the various quantities here, but probably someone already quite familiar with the notation will be able to help.
I am completely stumped by one step that should be simple. My question is about Eq. (5.45). My question is on the last step, which is
[tex] \biggl( |i \rangle^{\dot{b}} ~\langle i-1|_{\dot{a}} ~ - ~ |i-1 \rangle^{\dot{b}} \, \langle i |_{\dot{a}} \biggr) y_i^{\dot{a} a} = \langle i-1, i \rangle \, y_i^{\dot{b}a} [/tex]
I am stumped, conservation of momentum or the Schouten identity does not help here.
I can provide more details with the various quantities here, but probably someone already quite familiar with the notation will be able to help.