- #1
Sangoku
- 20
- 0
Hi.. in what sense do you intrdouce the cut-off inside the action
[tex] \int_{|p| \le \Lambda} \mathcal L (\phi, \partial _{\mu} \phi ) [/tex]
then all the quantities mass [tex] m(\Lambda) [/tex] charge [tex] q(\Lambda) [/tex] and Green function (every order 'n') [tex] G(x,x',\Lambda) [/tex]
will depend on the value of cut-off, and are well defined whereas this cut-off is finite now what else can be done ??.. could we consider this cut-off [tex] \Lambda [/tex] to be some kind of 'physical' field (or have at least a physical meaning, or can we make this finite measuring 'm' 'q' or similar
[tex] \int_{|p| \le \Lambda} \mathcal L (\phi, \partial _{\mu} \phi ) [/tex]
then all the quantities mass [tex] m(\Lambda) [/tex] charge [tex] q(\Lambda) [/tex] and Green function (every order 'n') [tex] G(x,x',\Lambda) [/tex]
will depend on the value of cut-off, and are well defined whereas this cut-off is finite now what else can be done ??.. could we consider this cut-off [tex] \Lambda [/tex] to be some kind of 'physical' field (or have at least a physical meaning, or can we make this finite measuring 'm' 'q' or similar
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