Color reconnection as a possible mechanism of intermittency in the emission spectra of charged particles in PYTHIA-generated high-multiplicity $\text{pp}$ collisions at energies available at the CERN Large Hadron Collider

Abstract

Nonstatistical fluctuation in pseudorapidity ($\eta$), azimuthal ($\varphi$), and pseudorapidity-azimuthal ($\eta -\varphi$) distribution spectra of primary particles of PYTHIA Monash (default) generated $pp$ events at $\sqrt{s}=$ 2.76, 7, and 13 TeV have been studied using the scaled factorial moments technique. A weak intermittent type of emission could be realized for minimum-bias (MB) $pp$ events in $\chi (\eta -\varphi )$ space and a much stronger intermittency could be observed in high-multiplicity (HM) $pp$ events in all $\chi (\eta )$, $\chi (\varphi )$, and $\chi (\eta -\varphi )$ spaces at all the studied energies. For HM $pp$ events, at a particular energy, the intermittency index ${\alpha }_q$ is found to be largest in two-dimensional $\chi (\eta -\varphi )$ space and least in $\chi (\eta )$ space, and no center of mass energy dependence of ${\alpha }_q$ could be observed. The anomalous dimensions $d_q$ are observed to be increased with the order of the moment $q$, suggesting a multifractal nature of the emission spectra of various studied events. While, the coefficient ${\lambda }_q$ is found to decrease monotonically with the order of the moment $q$ for two-dimensional analysis of MB $pp$ events as well as for one-dimensional analysis of HM $pp$ events, a clear minimum in ${\lambda }_q$ values could be observed from the two-dimensional HM $pp$ data analysis. For PYTHIA Monash generated sets of data, the strength of the intermittency is found to vary significantly with the variation of the strength of the color reconnection (CR) parameter, i.e., reconnection range RR, for RR = 0.0, 1.8 and 3.0, thereby, establishing a strong connection between the CR mechanism and the observed intermittent type of emission of primary charged particles of the studied high-multiplicity $pp$ events.

arXiv comment9 Pages, 12 Figures, 2 Tables, To be published in Physical Review C

References in corpus (22)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration
• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• The PHOBOS Perspective on Discoveries at RHIC
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• What RHIC Experiments and Theory tell us about Properties of Quark-Gluon Plasma ?
• Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions
• Centrality dependence of $\pi$, K, p production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Hydrodynamic Models for Heavy Ion Collisions
• Initial state geometry and the role of hydrodynamics in proton-proton, proton-nucleus and deuteron-nucleus collisions
• Color reconnection and flow-like patterns in pp collisions
• Results from the Relativistic Heavy Ion Collider
• Elliptic flow of identified hadrons in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Multiplicity dependence of the average transverse momentum in pp, p-Pb, and Pb-Pb collisions at the LHC
• Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Pseudorapidity and transverse-momentum distributions of charged particles in proton-proton collisions at $\sqrt{\text{s}}$ = 13 TeV
• Charged-particle multiplicities in proton-proton collisions at $\sqrt{s}$ = 0.9 to 8 TeV
• Pseudorapidity dependence of the anisotropic flow of charged particles in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Scaling properties of multiplicity fluctuations in heavy ion collisions simulated by AMPT model
• Multiple Interactions, Saturation, and Final States in pp Collisions and DIS

Cited by in corpus (6)

• Intermittency analysis of proton numbers in heavy-ion collisions at energies available at the BNL Relativistic Heavy Ion Collider
• Signature of intermittency in hybrid UrQMD-hydro data at 10 AGeV Au+Au collisions
• Event-By-Event Fluctuation of Maximum Particle Density in Narrow Pseudo-Rapidity Interval at a Few AGeV/c
• Effect of color reconnection on multiplicity dependent charged particle production in Pythia-generated $pp$ collisions at the LHC energies
• Intermittency of charged particles in the hybrid UrQMD+CMC model at energies available at the BNL Relativistic Heavy Ion Collider
• Gauge fields renormalization groups and thermofractals