Using a transverse momentum cutoff in kT factorization, the authors fix the soft and semihard mean multiplicities in a double negative binomial fit and find that KNO scaling holds only for narrow rapidity windows and that KNO violation is not caused by the rising semihard fraction.
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Soft and semihard components of multiplicity distributions in the $k_T$ factorization approach
Using a transverse momentum cutoff in kT factorization, the authors fix the soft and semihard mean multiplicities in a double negative binomial fit and find that KNO scaling holds only for narrow rapidity windows and that KNO violation is not caused by the rising semihard fraction.