Abstract
The study and understanding of the details of proton-proton collisions is important since they are the benchmark for the comparison with heavy ion results. In the present work we have studied the ΔηΔϕ correlations as a function of the event multiplicity and transverse sphericity in pp collisions at = 7 TeV using the PYTHIA 8.180 generator. The results show large variation in the shape of the correlation as function of the sphericity and multiplicity indicating the importance of slicing the data in bins of both observables to better understand the complexity of the interactions. Motivated by the flow like patterns originated by color reconnection (CR), results with and without CR together with dihadron correlations are discussed.
Highlights
In the present work we have studied the ∆η∆φ correlations as a function of the event multiplicity and transverse sphericity in pp collisions at √s = 7 TeV using PYTHIA 8.180
Motivated by the radial flow patterns originated by color reconnection (CR), results with and without CR together with dihadron correlations are discussed
The pp collisions have a complicated structure which involves complex final states, with large multiplicities of hadrons, all originated from different processes [1], this complexity of the interactions requires MC event generators to simulate them
Summary
The pp collisions have a complicated structure which involves complex final states, with large multiplicities of hadrons, all originated from different processes [1], this complexity of the interactions requires MC event generators to simulate them. Different techniques of analyses are used to investigate the properties of the hadronic interactions, among them the dihadron azimuthal correlations Using this observable, an interesting ridge-shaped correlation has been discovered in collisions of heavy nuclei. Recent results from CMS have revealed a striking ridge structure in very high multiplicity proton-proton (pp) collisions at a center-of-mass energy of 7 TeV This novel structure resembles similar features observed in relativistic heavy-ion experiments [3]. The effect observed by CMS, cannot be reproduced[4] by PYTHIA 8.180, in this work we investigate the possible presence of the ridge, studying the dihadron correlation as a function of the event shape variable, since it allows to control the amount of MPI and hardness of the partonic interactions[7]. The limit values of this variable are related to specific configuration in the transverse plane
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