description
Violation of the KNO scaling [QCD ] KNO Scaling [Koba, Nielsen, Olesen, Nucl. Rev. B40 (1972) 371]. Violation already reported by UA5 (and comparing ISR, SPS, Tevatron). CMS confirms violation for | | ). Interpretation: connected to the presence of Multiple Parton Interactions. Ψ(z) = P(N ch ) z = N ch / |η| < 2.4 |η| < April Paolo Bartalini - DIS - Marseille