Simulation studies of R2(Δη,Δφ) and P2(Δη,Δφ) correlation functions in pp collisions with the PYTHIA and HERWIG models

Sahoo, Baidyanath; Nandi, Basanta Kumar; Pujahari, Prabhat; Basu, Sumit; Pruneau, Claude

doi:10.1103/physrevc.100.024909

Title: Simulation studies of R₂(Δη,Δφ) and P₂(Δη,Δφ) correlation functions in pp collisions with the PYTHIA and HERWIG models

Journal Article · Wed Aug 21 00:00:00 EDT 2019 · Physical Review C

DOI:https://doi.org/10.1103/physrevc.100.024909· OSTI ID:1610198

^[1]; Nandi, Basanta Kumar ^[1]; Pujahari, Prabhat ^[2]; Basu, Sumit ^[3]; Pruneau, Claude ^[3]

Indian Inst. of Technology Bombay, Mumbai (India)
Indian Inst. of Technology Madras, Chennai (India)
Wayne State Univ., Detroit, MI (United States)

We report studies of charge-independent (CI) and charge-dependent (CD) two-particle differential-number correlation functions, R₂(Δη,Δφ), and transverse momentum (p_T) correlation functions, P₂(Δη,Δφ), of charged particles in √s = 2.76 TeV pp collisions with the PYTHIA and HERWIG models. Model predictions are presented for inclusive charged hadrons (h^±), as well as pions (π^±), kaons (K^±), and (anti-)protons (p¯/p) in the 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, with full azimuthal coverage in the range |η| < 1.0. We compare the model predictions for the strength and shape of the R₂ and P₂ correlators as these pertain to recent measurements by the ALICE collaboration. The R₂ and P₂ correlation functions estimated with PYTHIA and HERWIG exhibit qualitatively similar near-side and away-side correlation structures but feature important differences. Here, our analysis indicates that comparative studies of R₂ and P₂ correlation functions would provide valuable insight towards the understanding of particle production in pp collisions, and by extension, should also be useful in studies of heavy-ion collisions. Comparison of the Δη dependence of R₂ and P₂ could contribute, in particular, to a better understanding and modeling of the angular ordering of particles produced by hadronization in jets, as well as a better description of jet fragmentation functions of identified species at low momentum fraction (z).

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Research Organization:: Wayne State Univ., Detroit, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-92ER40713

OSTI ID:: 1610198

Alternate ID(s):: OSTI ID: 1558165

Journal Information:: Physical Review C, Vol. 100, Issue 2; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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Title: Simulation studies of R2(Δη,Δφ) and P2(Δη,Δφ) correlation functions in pp collisions with the PYTHIA and HERWIG models

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Title: Simulation studies of R₂(Δη,Δφ) and P₂(Δη,Δφ) correlation functions in pp collisions with the PYTHIA and HERWIG models