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4
votes
1answer
130 views
Why Must Conserved Currents of Lorentz Symmetry Satisfy the Lorentz Algebra
I've seen it written many times that the commutation relation
$[M^{I-},M^{J-}]=0$
is required for Lorentz invariance in the light cone gauge quantisation of the bosonic string. This follows ...
6
votes
1answer
48 views
“gauge fixed world-sheet action”
My question is in reference to the action in equation 4.130 of Becker, Becker and Schwartz.
It reads as,
$S_{matter}= \frac{1}{2\pi}\int (2\partial X^\mu \bar{\partial}X_\mu + \frac{1}{2}\psi^\mu ...
