Benchmarking the non-flow contributions to the elliptic flow parameter (v2) in proton-proton collisions
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Physics Department
Third Author's Department
Physics Department
Fourth Author's Department
Physics Department
Fifth Author's Department
Physics Department
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https://doi.org/10.1088/1361-6471/ad8210
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.
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APA Citation
Abdulhamid, M.
Hamed, A.
Osama, E.
Rateb, M.
...
(2024). Benchmarking the non-flow contributions to the elliptic flow parameter (v2) in proton-proton collisions. Journal of Physics G: Nuclear and Particle Physics, 51(12),
https://doi.org/10.1088/1361-6471/ad8210
MLA Citation
Abdulhamid, M. I., et al.
"Benchmarking the non-flow contributions to the elliptic flow parameter (v2) in proton-proton collisions." Journal of Physics G: Nuclear and Particle Physics, vol. 51, no. 12, 2024
https://doi.org/10.1088/1361-6471/ad8210
Comments
Article. Record derived from SCOPUS.