Charged hadron production in hadron-hadron collisions with longitudinal momentum fraction
Feynman-x, xF, between 0.1 and 0.9 has not been measured above √s=63 GeV at the CERN Intersecting Storage Rings. I discuss a way to measure this at the Large Hadron Collider at √s= 13 TeV, which is 40,000 times higher in equivalent fixed target energy, and important for understanding cosmic ray showers.