A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Multiplicity dependence of charged-particle jet production in pp collisions at √s = 13 TeV (2022)
ALICE Collaboration. (2022). Multiplicity dependence of charged-particle jet production in pp collisions at √s = 13 TeV. European Physical Journal C, 82(6), Article 514. https://doi.org/10.1140/epjc/s10052-022-10405-x
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Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: ALICE Collaboration
Lehti tai sarja: European Physical Journal C
ISSN: 1434-6044
eISSN: 1434-6052
Julkaisuvuosi: 2022
Ilmestymispäivä: 07.06.2022
Volyymi: 82
Lehden numero: 6
Artikkelinumero: 514
Kustantaja: Springer Science and Business Media LLC
Julkaisumaa: Saksa
Julkaisun kieli: englanti
DOI: https://doi.org/10.1140/epjc/s10052-022-10405-x
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/82574
Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2202.01548
Tiivistelmä
The multiplicity dependence of jet production in pp collisions at the centre-of-mass energy of √s=13 TeV 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<140 GeV/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 20 GeV/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.
YSO-asiasanat: hiukkasfysiikka; kvanttiväridynamiikka
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2022
JUFO-taso: 2
