Quote:
Originally posted by Pasti:
Ibliss:"The natural explanation is that the standard model is an effective field theory which describes degrees of freedom of nature below some cutoff momentum."

Yes,true,or below some energy. However, this explanation does not apply to renormalizability. But is such an explanation natural, or is it an a posteriori explanation, a justification of sorts?Is it fact or technique?
Alternatively, think about quantum gravity.Perturbatively it is non-renormalizable, and furthermore, you need to impose cutoffs. But as far as LQG goes, the cutoffs are present in the theory since the area and volume operator are quantized.

LAXMIKANT