In "Research and Development for a Gadolinium Doped Water Cherenkov Detector" the phrase "forward peaking" is used to describe a signal. This comes up in lots of other contexts too, but I still can't work out what's meant by it. The sentence in question is;
"But due to a strong forward peaking of the neutrino-electron elastic scattering cross section, a solar neutrino signal can be extracted from the data using the directionality of the electrons."
Can you define "forward peaking" please?