Momentum Kick Model Description of the Ridge in (Delta-phi)-(Delta eta) Correlation in pp Collisions at 7 TeV

TL;DR

This paper explains the near-side ridge in proton-proton collisions at 7 TeV using a momentum kick model where medium partons gain momentum from jet interactions, revealing a rapidity plateau similar to nucleus-nucleus collisions.

Contribution

It introduces a momentum kick model to describe the ridge phenomenon in pp collisions at LHC, linking it to flux tube particle production and medium parton dynamics.

Findings

Ridge structure explained by medium partons receiving momentum kicks.

Medium parton distribution shows a rapidity plateau.

Model aligns with CMS observations at 7 TeV.

Abstract

The near-side ridge structure in the (Delta phi)-(Delta eta) correlation observed by the CMS Collaboration for pp collisions at 7 TeV at LHC can be explained by the momentum kick model in which the ridge particles are medium partons that suffer a collision with the jet and acquire a momentum kick along the jet direction. Similar to the early medium parton momentum distribution obtained in previous analysis for nucleus-nucleus collisions at 0.2 TeV, the early medium parton momentum distribution in pp collisions at 7 TeV exhibits a rapidity plateau as arising from particle production in a flux tube.