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 TeV. The event activity, quantified by charged-particle number and summed- pT densities, is measured as a function of the leadingparticle transverse momentum (p(T)(trig)). These quantities are studied in three azimuthalangle regions relative to the leading particle in the event: toward, away, and transverse. Results are presented for three different p(T) thresholds (0.15, 0.5 and 1 GeV/c) at midpseudorapidity (|eta| < 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 p(T)(trig) for low p(trig) (T), followed by a saturation at p(T)(trig) approximate to 5 GeV/c. The results from pp collisions are compared with existing measurements at other centre-ofmass 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 p(trig) (T) > 10 GeV/c, whereas for lower p(T)(trig) 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.

S. Acharya, D. Adamov??, A. Adler, G. Aglieri Rinella, M. Agnello, N. Agrawal, et al. (2023). Underlying-event properties in pp and p-Pb collisions at √sNN = 5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2023(6), 0-37 [10.1007/jhep06(2023)023].

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

N. Agrawal;A. Alici;S. Arcelli;F. Carnesecchi;L. Cifarelli;M. Colocci;F. Ercolessi;M. Giacalone;N. Jacazio;N. Rubini;G. Scioli;S. Strazzi;
2023

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 TeV. The event activity, quantified by charged-particle number and summed- pT densities, is measured as a function of the leadingparticle transverse momentum (p(T)(trig)). These quantities are studied in three azimuthalangle regions relative to the leading particle in the event: toward, away, and transverse. Results are presented for three different p(T) thresholds (0.15, 0.5 and 1 GeV/c) at midpseudorapidity (|eta| < 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 p(T)(trig) for low p(trig) (T), followed by a saturation at p(T)(trig) approximate to 5 GeV/c. The results from pp collisions are compared with existing measurements at other centre-ofmass 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 p(trig) (T) > 10 GeV/c, whereas for lower p(T)(trig) 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.
2023
S. Acharya, D. Adamov??, A. Adler, G. Aglieri Rinella, M. Agnello, N. Agrawal, et al. (2023). Underlying-event properties in pp and p-Pb collisions at √sNN = 5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2023(6), 0-37 [10.1007/jhep06(2023)023].
S. Acharya; D. Adamov??; A. Adler; G. Aglieri Rinella; M. Agnello; N. Agrawal; Z. Ahammed; S. Ahmad; S. U. Ahn; I. Ahuja; A. Akindinov; M. Al-Turany; ...espandi
File in questo prodotto:
File Dimensione Formato  
JHEP06(2023)023.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 1.55 MB
Formato Adobe PDF
1.55 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/951057
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 0
social impact