Trace technology with polarisation vectors

General Tech Technology & Software 3 years ago

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manpreet Tuteehub forum best answer Best Answer 3 years ago

 

Consider dd-dimensional gamma matrix structures. I have an expression like

h2=±Tr(/ξ2/p3/ξ¯2/p1),∑h2=±Tr(⧸ξ2⧸p3⧸ξ¯2⧸p1),

where p̸=pμημνγνp̸=pμημνγν are the momenta contracted with the gamma matrices and ξ̸=ξμημνγνξ̸=ξμημνγν are the helicity vectors contracted with the gamma matrices. 

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