Questions tagged [infrared-divergences]

One way to deal with IR-divergences in QED is sum over soft photons, which can't be detected due to finite sensitivity of detector: only photons with energy bigger that resolution of detector $E>E_{min}$ can be detected. How to deal with possibility…

As we know, we can remove infrared divergences by summing over all final states with arbitrary number of soft photons. But in QCD this does not work, since gluons are not "neutral" because they carry color charge. What's more, they are massless. So…

can be a theory with an infinite number of divergent integrals of the form $$ \int \frac{d^{p}k}{k^{m}} $$ for m=1 , 2 , 3 , 4 ,...... so the theory would be IR non renormalizable and you would need and infinite set of operations to cure all the IR…