What is the “dead cone effect” in the field of physics?

Question

In regards to this: https://alice-collaboration.web.cern.ch/node/35173#:~:text=The%20dead%2Dcone%20effect%20is,0%20meson%20amongst%20their%20constituents.

In: 12

Answer 1

To keep it simple: We think quarks interact through “colour charges”, the forces obey the “quantum chromodynamics”. That is pretty much like positive and negative charge, but in 3 directions and not only 2.

If you solve the underlying math you can find that radiation of particles should be supressed in a cone shaped area in the direction of their movement. That’s the dead-cone

If you can experimentally verify that this cone exists that confirms the underlying theory (colour charges can’t be measured directly, so we need this kind of indirect proof)