Forward backward multiplicity correlations: a tool to study properties of the proton-proton collisions

Edgar Dominguez-Rosas,Eleazar Cuautle Flores,A Ayala Mercado,E Cuautle Flores

doi:10.1051/epjconf/201817205008

Edgar Dominguez-Rosas, Eleazar Cuautle Flores + Show 2 more

Open Access

https://doi.org/10.1051/epjconf/201817205008

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Abstract

Forward-backward multiplicity correlations have been used to study hadron production mechanisms in electron-positron, proton-proton and more recently in leadlead collisions. The experimental results on this correlations and its comparison to different models reveals an incomplete agreement. In this work, we present an study of forward backward multiplicity correlations in proton-proton collisions using PYTHIA event generator, at LHC energies. Detailed analysis is presented in the case of soft and hard QCD processes, incorporating color reconnection model as part of hadronization mechanism and multiple parton interactions effects in the correlations. Our results and its comparison to available experimental data suggest that this kind of correlations are great tools to characterize the events and gives the possibility to disentangle phenomena in hard and soft QCD processes.

Highlights

In the present work we analyze F − B multiplicity correlations and possible effects on it due to final state interactions in the hadronization mechanism, those like color reconnection (CR) as well as from the number of multiple parton interactions, these phenomenological models are successfully used to describe kinematic variables like average transverse momentum of charged hadrons and multiplicity distributions, its importance to investigate the effects on F − B multiplicity correlations
The analysis 0.9 and 7 TeV using PYTHIA event generator, with the effects was done in p+p of the number of collision multiple parton interactions and different strength values of color reconnection, splitting the events into soft and hard QCD processes
The analysis of F − B multiplicity correlations shows a weak dependence with the number of multiple parton interactions while the energy produce almost scaling behavior of the correlations

Summary

Introduction

Long 52.6 time ago, on difMeV/c [1] where awtas√fso=un5d7p0oMsiteivVe/cva[l2u]eisnfSorPtShe, correlations, five years again positive values of later there were results of p + pthe correlation were found, and collisions a possible dep√endence on the energy was reported. Following this kind of correlations, results on e+e− collisions at s = 29 GeV [3] were published, the reported results shows no F − B correlations, this result was interpreted as a consequence of the independent fragmentation of the jets produced in t√he collision. This variable allow to study the out coming hadrons of the collisions, those are expected to come from the collisions if we analyze central pseudorapidity regions, while for larger values of η we expect to see hadrons coming from the fragmentation region, and from colliding beam

Forward-Backward multiplicity correlation with PYTHIA

Conclusions