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Multiplicity dependence of charged-particle jet production in pp collisions at √s=13TeV

Acharya, S. ; Adolfsson, J. LU ; Basu, S. LU orcid ; Christiansen, P. LU ; Matonoha, O. LU ; Nassirpour, A.F. LU orcid ; Ohlson, A. LU ; Oskarsson, A. LU ; Richert, T. LU and Rueda, O.V. LU , et al. (2022) In European Physical Journal C 82(6).
Abstract
The multiplicity dependence of jet production in pp collisions at the centre-of-mass energy of s=13TeV is studied for the first time. Jets are reconstructed from charged particles using the anti-kT algorithm with resolution parameters R varying from 0.2 to 0.7. The jets are measured in the pseudorapidity range | ηjet| < 0.9 - R and in the transverse momentum range 5<pT,jetch<140GeV/c. The multiplicity intervals are categorised by the ALICE forward detector V0. The pT differential cross section of charged-particle jets are compared to leading order (LO) and next-to-leading order (NLO) perturbative quantum chromodynamics (pQCD) calculations. It is found that the data are better described by the NLO calculation, although the NLO... (More)
The multiplicity dependence of jet production in pp collisions at the centre-of-mass energy of s=13TeV is studied for the first time. Jets are reconstructed from charged particles using the anti-kT algorithm with resolution parameters R varying from 0.2 to 0.7. The jets are measured in the pseudorapidity range | ηjet| < 0.9 - R and in the transverse momentum range 5<pT,jetch<140GeV/c. The multiplicity intervals are categorised by the ALICE forward detector V0. The pT differential cross section of charged-particle jets are compared to leading order (LO) and next-to-leading order (NLO) perturbative quantum chromodynamics (pQCD) calculations. It is found that the data are better described by the NLO calculation, although the NLO prediction overestimates the jet cross section below 20GeV/c. The cross section ratios for different R are also measured and compared to model calculations. These measurements provide insights into the angular dependence of jet fragmentation. The jet yield increases with increasing self-normalised charged-particle multiplicity. This increase shows only a weak dependence on jet transverse momentum and resolution parameter at the highest multiplicity. While such behaviour is qualitatively described by the present version of PYTHIA, quantitative description may require implementing new mechanisms for multi-particle production in hadronic collisions. © 2022, The Author(s). (Less)
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type
Contribution to journal
publication status
published
subject
in
European Physical Journal C
volume
82
issue
6
article number
514
publisher
Springer
external identifiers
  • scopus:85134078179
ISSN
1434-6044
DOI
10.1140/epjc/s10052-022-10405-x
language
English
LU publication?
yes
id
9b6df48d-f397-4f73-ac4d-8f68e21330e5
date added to LUP
2022-09-14 08:48:32
date last changed
2023-05-11 09:11:53
@article{9b6df48d-f397-4f73-ac4d-8f68e21330e5,
  abstract     = {{The multiplicity dependence of jet production in pp collisions at the centre-of-mass energy of s=13TeV is studied for the first time. Jets are reconstructed from charged particles using the anti-kT algorithm with resolution parameters R varying from 0.2 to 0.7. The jets are measured in the pseudorapidity range | ηjet| &lt; 0.9 - R and in the transverse momentum range 5&lt;pT,jetch&lt;140GeV/c. The multiplicity intervals are categorised by the ALICE forward detector V0. The pT differential cross section of charged-particle jets are compared to leading order (LO) and next-to-leading order (NLO) perturbative quantum chromodynamics (pQCD) calculations. It is found that the data are better described by the NLO calculation, although the NLO prediction overestimates the jet cross section below 20GeV/c. The cross section ratios for different R are also measured and compared to model calculations. These measurements provide insights into the angular dependence of jet fragmentation. The jet yield increases with increasing self-normalised charged-particle multiplicity. This increase shows only a weak dependence on jet transverse momentum and resolution parameter at the highest multiplicity. While such behaviour is qualitatively described by the present version of PYTHIA, quantitative description may require implementing new mechanisms for multi-particle production in hadronic collisions. © 2022, The Author(s).}},
  author       = {{Acharya, S. and Adolfsson, J. and Basu, S. and Christiansen, P. and Matonoha, O. and Nassirpour, A.F. and Ohlson, A. and Oskarsson, A. and Richert, T. and Rueda, O.V. and Silvermyr, D. and Zurlo, N.}},
  issn         = {{1434-6044}},
  language     = {{eng}},
  number       = {{6}},
  publisher    = {{Springer}},
  series       = {{European Physical Journal C}},
  title        = {{Multiplicity dependence of charged-particle jet production in pp collisions at √s=13TeV}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-022-10405-x}},
  doi          = {{10.1140/epjc/s10052-022-10405-x}},
  volume       = {{82}},
  year         = {{2022}},
}