HIGHLIGHTS
SUMMARY
Since the prompt neutrino yield is intimately related to forward (high xc ) charm (anti)quark production, the so-called superposition model (see, e_g, Ref ) is fully applicable here: the neutrino yield from a primary nucleus of mass number Ai and energy E0 can be approximated by Ai times the yield from a primary proton of energy E0=Ai. Let us recall that the relative abundances of the main primary mass groups are of the same order of magnitude at the proton knee energy (see, e_g, Refs. The target gluon PDF is mostly probed at . . .
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