Underlying-event properties in pp and p-Pb collisions at √sNN=5.02 TeV

• Titel: Underlying-event properties in pp and p-Pb collisions at √sNN=5.02 TeV
• Mitwirkende: Acharya, Shreyasi [VerfasserIn]
• Mitwirkende: Angelov, Venelin [VerfasserIn]
• Mitwirkende: Berdnikova, Anastasia [VerfasserIn]
• Mitwirkende: Bergmann, Luisa [VerfasserIn]
• Mitwirkende: Danisch, Meike [VerfasserIn]
• Mitwirkende: Feuillard, Victor [VerfasserIn]
• Mitwirkende: Fokin, Ilya D. [VerfasserIn]
• Mitwirkende: Glässel, Peter [VerfasserIn]
• Mitwirkende: Kroesen, Martin [VerfasserIn]
• Mitwirkende: López, Jorge [VerfasserIn]
• Mitwirkende: Nath, Abhishek [VerfasserIn]
• Mitwirkende: Pachmayer, Yvonne C. [VerfasserIn]
• Mitwirkende: Reygers, Klaus [VerfasserIn]
• Mitwirkende: Schicker, Rainer [VerfasserIn]
• Mitwirkende: Skorodumovs, Georgijs [VerfasserIn]
• Mitwirkende: Stachel, Johanna [VerfasserIn]
• Mitwirkende: Stiefelmaier, Stephan [VerfasserIn]
• Mitwirkende: Veen, Casper Arie van [VerfasserIn]
• Mitwirkende: Völkl, Martin [VerfasserIn]
• Mitwirkende: Windelband, Bernd [VerfasserIn]
• Mitwirkende: Yüncü, Alperen [VerfasserIn]
• Mitwirkende: Zanone, Federica [VerfasserIn]
• Körperschaft: ALICE (Körperschaft) [VerfasserIn]
• Verf.angabe: The ALICE collaboration
• E-Jahr: 2023
• Jahr: June 5, 2023
• Umfang: 38 S.
• Fussnoten: Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol, "NN" ist dabei tiefgestellt ; The ALICE collaboration: S. Acharya, V. Anguelov, A. Berdnikova, L. Bergmann, M.C. Danisch, V.J.G. Feuillard, S. Fokin, P. Glässel, M. Kroesen, J. Lopez, A. Nath, Y. Pachmayer, K. Reygers, R. Schicker, G. Skorodumovs, J. Stachel, S. Stiefelmaier, C.A. van Veen, M. Völkl, B. Windelband, A. Yüncü, F. Zanone [und viele weitere] ; Gesehen am 25.10.2023
• Titel Quelle: Enthalten in: Journal of high energy physics
• Ort Quelle: Berlin : Springer, 1997
• Jahr Quelle: 2023
• Band/Heft Quelle: (2023), 6, Artikel-ID 23, Seite 1-38
• ISSN Quelle: 1029-8479
• DOI: doi:10.1007/JHEP06(2023)023
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Properties of Hadrons
• Sach-SW: Quark-Gluon Plasma
• K10plus-PPN: 1867594048

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 Te. The event activity, quantified by charged-particle number and summed-pT densities, is measured as a function of the leading-particle transverse momentum (Pt trig). 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| < 0.8). The event activity in the transverse region, which is the most sensitive to the underlying event, exhibits similar behaviour in both pp and p-Pb collisions, namely, a steep increase with pTtrig for low pTtrig, followed by a saturation at pTtrig ≈ 5 GeV/c. The results from pp collisions are compared with existing measurements at other centre-of-mass energies. The quantities in the toward and away regions are also analyzed after the subtraction of the contribution measured in the transverse region. The remaining jet-like particle densities are consistent in pp and p-Pb collisions for pTtrig >10 GeV/c, whereas for lower pTtrig 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.