A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Measurement of the angle between jet axes in pp collisions at s√ = 5.02 TeV (2023)

ALICE Collaboration. (2023). Measurement of the angle between jet axes in pp collisions at s√ = 5.02 TeV. Journal of High Energy Physics, 2023(7), Article 201. https://doi.org/10.1007/JHEP07(2023)201

JYU-tekijät tai -toimittajat

Huhta, Laura
Kim, Dong
Molander, Andreas
Rytkönen, Heidi
Räsänen, Sami
Saarimäki, Oskari
Trzaska, Wladyslaw
Önnerstad, Anna

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: ALICE Collaboration

Lehti tai sarja: Journal of High Energy Physics

ISSN: 1126-6708

eISSN: 1029-8479

Julkaisuvuosi: 2023

Ilmestymispäivä: 26.07.2023

Volyymi: 2023

Lehden numero: 7

Artikkelinumero: 201

Kustantaja: Springer

Julkaisumaa: Saksa

Julkaisun kieli: englanti

DOI: https://doi.org/10.1007/JHEP07(2023)201

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/88926

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2211.08928

Tiivistelmä

This article reports measurements of the angle between differently defined jet axes in pp collisions at √s = 5.02 TeV carried out by the ALICE Collaboration. Charged particles at midrapidity are clustered into jets with resolution parameters R = 0.2 and 0.4. The jet axis, before and after Soft Drop grooming, is compared to the jet axis from the Winner-Takes-All (WTA) recombination scheme. The angle between these axes, ∆Raxis, probes a wide phase space of the jet formation and evolution, ranging from the initial high-momentum-transfer scattering to the hadronization process. The ∆Raxis observable is presented for 20 < pTch jet < 100 GeV/c, and compared to predictions from the PYTHIA 8 and Herwig 7 event generators. The distributions can also be calculated analytically with a leading hadronization correction related to the non-perturbative component of the Collins-Soper-Sterman (CSS) evolution kernel. Comparisons to analytical predictions at next-to-leading-logarithmic accuracy with leading hadronization correction implemented from experimental extractions of the CSS kernel in Drell-Yan measurements are presented. The analytical predictions describe the measured data within 20% in the perturbative regime, with surprising agreement in the non-perturbative regime as well. These results are compatible with the universality of the CSS kernel in the context of jet substructure.

YSO-asiasanat: hiukkasfysiikka

Vapaat asiasanat: hadron-hadron scattering, jet substructure; boosted jets

Liittyvät organisaatiot

Hankkeet, joissa julkaisu on tehty

OKM-raportointi: Kyllä

Raportointivuosi: 2023

JUFO-taso: 3