Simulation Studies of R₂(Δ η, Δ ϕ) and P₂(Δ η, Δ ϕ) Correlation Functions in pp Collisions with the PYTHIA and HERWIG Models

Summary, in English

We presented a study of charge-independent (CI) and charge-dependent (CD) two-particle differential number correlation functions R₂ and transverse momentum correlation functions P₂ in pp collisions at s=2.76 TeV with the PYTHIA and HERWIG models.Calculations were presented for unidentified hadrons in three p_T ranges 0.2 < p_T≤ 2.0 GeV/c, 2.0 < p_T≤ 5.0 GeV/c, and 5.0 < p_T≤ 30.0 GeV/c.PYTHIA and HERWIG both qualitatively reproduce the near-side peak and away-side ridge correlation features reported by experiments.At low p_T, both models produce narrower near-side peaks in P₂ correlations than in R₂ as reported by the ALICE collaboration in p–Pb and Pb–Pb collisions.This suggests that the narrower shape of the P₂ near-side peak is largely determined by the p_T dependent angular ordering of hadrons produced in jets.Both PYTHIA and HERWIG predict widths that decrease with increasing p_T.Widths extracted for P₂ correlators are typically significantly narrower than those of the R₂ counterparts [1].

• Author: Baidyanath Sahoo; Basanta Kumar Nandi; Prabhat Pujahari; Sumit Basu; Claude Pruneau
• Editor: Bedangadas Mohanty; Sanjay Kumar Swain; Ranbir Singh; Varchaswi K. Kashyap
• Department/s: Particle and nuclear physics
• Publishing year: 2022
• Language: English
• Pages: 349-352
• Publication/Series: Springer Proceedings in Physics
• Volume: 277
• Links: http://dx.doi.org/10.1007/978-981-19-2354-8_63
• Document type: Conference paper
• Publisher: Springer Science and Business Media B.V.
• Topic: Subatomic Physics
• Conference name: 24th DAE-BRNS High Energy Physics Symposium, 2020
• Conference date: 2020-12-14 - 2020-12-18
• Conference place: Jatni, India
• Status: Published
• ISBN/ISSN/Other: ISSN: 1867-4941; ISSN: 0930-8989; ISBN: 9789811923531