A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Underlying event properties in pp collisions at √s = 13 TeV (2020)


ALICE collaboration. (2020). Underlying event properties in pp collisions at √s = 13 TeV. Journal of High Energy Physics, 2020(4), Article 192. https://doi.org/10.1007/JHEP04(2020)192


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: ALICE collaboration

Lehti tai sarja: Journal of High Energy Physics

ISSN: 1126-6708

eISSN: 1029-8479

Julkaisuvuosi: 2020

Volyymi: 2020

Lehden numero: 4

Artikkelinumero: 192

Kustantaja: Springer

Julkaisumaa: Saksa

Julkaisun kieli: englanti

DOI: https://doi.org/10.1007/JHEP04(2020)192

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/68956

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/1910.14400


Tiivistelmä

This article reports measurements characterizing the Underlying Event (UE) associated with hard scatterings at midrapidity (|η| < 0.8) in pp collisions at s√ = 13 TeV. The hard scatterings are identified by the leading particle, the charged particle with the highest transverse momentum (pleadingT) in the event. Charged-particle number-densities and summed transverse-momentum densities are measured in different azimuthal regions defined with respect to the leading particle direction: Toward, Transverse, and Away. The Toward and Away regions contain the fragmentation products of the hard scatterings in addition to the UE contribution, whereas particles in the Transverse region are expected to originate predominantly from the UE. The study is performed as a function of pleadingT with three different pT thresholds for the associated particles, ptrackT > 0.15, 0.5, and 1.0 GeV/c. The charged-particle density in the Transverse region rises steeply for low values of pleadingT and reaches a plateau. The results confirm the trend that the charged-particle density in the Transverse region shows a stronger increase with s√ than the inclusive charged-particle density at midrapidity. The UE activity is increased by approximately 20% when going from 7 TeV to 13 TeV pp collisions. The plateau in the Transverse region (5


Vapaat asiasanat: Hadron-Hadron scattering (experiments)


Liittyvät organisaatiot

JYU-yksiköt:


OKM-raportointi: Kyllä

Raportointivuosi: 2020

JUFO-taso: 2


Viimeisin päivitys 2021-02-08 klo 10:24