Benchmarking the non-flow contributions to the elliptic flow parameter (v2) in proton-proton collisions

Second Author's Department

Physics Department

Third Author's Department

Physics Department

Fourth Author's Department

Physics Department

Fifth Author's Department

Physics Department

Find in your Library

https://doi.org/10.1088/1361-6471/ad8210

All Authors

M. I. Abdulhamid, A. M. Hamed, E. A. Osama, M. Rateb, N. K. Sadoun, F. H. Sawy

Document Type

Research Article

Publication Title

Journal of Physics G: Nuclear and Particle Physics

Publication Date

12-1-2024

doi

10.1088/1361-6471/ad8210

Abstract

This manuscript reports on the elliptic flow parameter, v 2 , in proton-proton (p-p) collisions using PYTHIA8 event generator simulations. The typical event plane (EP) method v 2 (EP) as the one used for the real data analysis has been adopted to measure the v 2 of particles composed of different quark flavors, and produced at mid-pseudorapidity ∣η∣≤1 at center-of-mass energy s = 200 GeV and s = 13 TeV. The event plane has been constructed using the soft-charged particles with transverse momentum ( p T < 2 GeV/c) produced in various η ranges. The pseudorapidity gap technique (Δη) between the particle of interest and the soft charged particles contributed to the event plane constructions has been utilized to benchmark the non-flow contributions. The v 2 π ± , π 0 , v 2 J ∕ ψ , ϒ , K , D , B , and the v 2 γ dir show similar pattern dependence on the transverse momentum for the same Δη, at both s = 200 GeV and s = 13 TeV. At each center-of-mass energy, the measured v 2 shows obvious dependence on the quark flavor contents where v 2 γ dir ≤ v 2 J ∕ ψ , ϒ , K , D , B ≤ v 2 π ± , π 0 for similar Δη gap. The measured v 2 shows slightly higher values at smaller s for particles of similar values of Δη gaps, particularly at small Δη gap. The measured v 2 for all particles shows systematic decreases with increasing the Δη gap as expected from the previous experimental results. Because PYTHIA8 simulations do not incorporate final state interactions, the v 2 ( EP ) values reported here primarily reflect the non-flow contributions and its dependence on the quark contents, pseudorapidity gap as a function on pT at each center of mass-energy. These contributions should be carefully subtracted from the signal in real data analysis that employs the same event plane determination algorithm.

Comments

Article. Record derived from SCOPUS.

Link to Full Text
Find this item online

Share

COinS