Density saturation and the decrease of the normalised width of the multiplicity distribution in high energy pp collisions

Abstract

It is experimentally observed that the width of the KNO multiplicity distribution --or the negative binomial parameter 1/k-- for pp collisions, in the energy region 10 to 1800 GeV, is an increasing function of the energy. We argue that in models with parton or string saturation such trend will necessary change: at some energy the distribution will start to become narrower. In the framework of percolating strings, we have estimated the change to occur at an energy of the order of 5--10 TeV.

10 pages, 4 figures, uses elsart and amsmath; comparison with some other models was added; version accepted by PLB

References in corpus (2)

• On signals of new physics in global event properties in pp collisions in the TeV energy domain
• Schwinger Model and String Percolation in Hadron-Hadron and Heavy Ion Collisions

Cited by in corpus (8)

• De-Confinement and Clustering of Color Sources in Nuclear Collisions
• String Percolation and the Glasma
• String and Parton Percolation
• Forward-backward multiplicity correlations in the wounded nucleon model
• Forward-backward rapidity correlations in a two-step scenario
• Long range correlations, event simulation and parton percolation
• Universal scaling of strange particle $p_{\mathrm{T}}$ spectra in pp collisions
• Multiplicity fluctuations and percolation of strings in hadron-hadron and nucleus-nucleus collisions