Underlying-event properties in pp and p–Pb collisions at √s NN = 5. 02 TeV

ALICE Collaboration; Jonathan Colburn; David Evans; Oliver Jevons; Peter Jones; Anton Jusko; Marian Krivda; Jakub Kvapil; Roman Lietava; Simone Ragoni; Orlando Villalobos Baillie; Nima Zardoshti

doi:10.1007/JHEP06(2023)023

Underlying-event properties in pp and p–Pb collisions at √s NN = 5. 02 TeV

ALICE Collaboration, Jonathan Colburn, David Evans, Oliver Jevons, Peter Jones, Anton Jusko, Marian Krivda, Jakub Kvapil, Roman Lietava, Simone Ragoni, Orlando Villalobos Baillie, Nima Zardoshti

Physics and Astronomy

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Abstract

We report about the properties of the underlying event measured with ALICE at the LHC in pp and p−Pb collisions at sNN−−−√=5.02 TeV. The event activity, quantified by charged-particle number and summed-pT densities, is measured as a function of the leading-particle transverse momentum (ptrigT). These quantities are studied in three azimuthal-angle regions relative to the leading particle in the event: toward, away, and transverse. Results are presented for three different pT thresholds (0.15, 0.5, and 1 GeV/c) at mid-pseudorapidity (|η|10 GeV/c, whereas for lower ptrigT values the event activity is slightly higher in p−Pb than in pp collisions. The measurements are compared with predictions from the PYTHIA 8 and EPOS LHC Monte Carlo event generators.

Original language	English
Article number	23
Journal	JHEP
Early online date	5 Jun 2023
DOIs	https://doi.org/10.1007/JHEP06(2023)023
Publication status	E-pub ahead of print - 5 Jun 2023

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title = "Underlying-event properties in pp and p–Pb collisions at √s NN = 5. 02 TeV",

abstract = "We report about the properties of the underlying event measured with ALICE at the LHC in pp and p−Pb collisions at sNN−−−√=5.02 TeV. The event activity, quantified by charged-particle number and summed-pT densities, is measured as a function of the leading-particle transverse momentum (ptrigT). These quantities are studied in three azimuthal-angle regions relative to the leading particle in the event: toward, away, and transverse. Results are presented for three different pT thresholds (0.15, 0.5, and 1 GeV/c) at mid-pseudorapidity (|η|10 GeV/c, whereas for lower ptrigT values the event activity is slightly higher in p−Pb than in pp collisions. The measurements are compared with predictions from the PYTHIA 8 and EPOS LHC Monte Carlo event generators.",

author = "{ALICE Collaboration} and Jonathan Colburn and David Evans and Oliver Jevons and Peter Jones and Anton Jusko and Marian Krivda and Jakub Kvapil and Roman Lietava and Simone Ragoni and {Villalobos Baillie}, Orlando and Nima Zardoshti",

year = "2023",

month = jun,

day = "5",

doi = "10.1007/JHEP06(2023)023",

language = "English",

journal = "JHEP",

issn = "1126-6708",

publisher = "Springer",

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TY - JOUR

T1 - Underlying-event properties in pp and p–Pb collisions at √s NN = 5. 02 TeV

AU - ALICE Collaboration

AU - Colburn, Jonathan

AU - Evans, David

AU - Jevons, Oliver

AU - Jones, Peter

AU - Jusko, Anton

AU - Krivda, Marian

AU - Kvapil, Jakub

AU - Lietava, Roman

AU - Ragoni, Simone

AU - Villalobos Baillie, Orlando

AU - Zardoshti, Nima

PY - 2023/6/5

Y1 - 2023/6/5

N2 - We report about the properties of the underlying event measured with ALICE at the LHC in pp and p−Pb collisions at sNN−−−√=5.02 TeV. The event activity, quantified by charged-particle number and summed-pT densities, is measured as a function of the leading-particle transverse momentum (ptrigT). These quantities are studied in three azimuthal-angle regions relative to the leading particle in the event: toward, away, and transverse. Results are presented for three different pT thresholds (0.15, 0.5, and 1 GeV/c) at mid-pseudorapidity (|η|10 GeV/c, whereas for lower ptrigT values the event activity is slightly higher in p−Pb than in pp collisions. The measurements are compared with predictions from the PYTHIA 8 and EPOS LHC Monte Carlo event generators.

AB - We report about the properties of the underlying event measured with ALICE at the LHC in pp and p−Pb collisions at sNN−−−√=5.02 TeV. The event activity, quantified by charged-particle number and summed-pT densities, is measured as a function of the leading-particle transverse momentum (ptrigT). These quantities are studied in three azimuthal-angle regions relative to the leading particle in the event: toward, away, and transverse. Results are presented for three different pT thresholds (0.15, 0.5, and 1 GeV/c) at mid-pseudorapidity (|η|10 GeV/c, whereas for lower ptrigT values the event activity is slightly higher in p−Pb than in pp collisions. The measurements are compared with predictions from the PYTHIA 8 and EPOS LHC Monte Carlo event generators.

U2 - 10.1007/JHEP06(2023)023

DO - 10.1007/JHEP06(2023)023

M3 - Article

SN - 1126-6708

JO - JHEP

JF - JHEP

M1 - 23

ER -

Underlying-event properties in pp and p–Pb collisions at √s NN = 5. 02 TeV

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