Buchumschlag

Measurement of the sensitivity of two-particle correlations in pp collisions to the presence of hard scatterings

A key open question in the study of multiparticle production in high-energy pp collisions is the relationship between the “ridge" - i.e., the observed azimuthal correlations between particles in the underlying event that extend over all rapidities - and hard or semihard scattering processes. In...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Aad, Georges (VerfasserIn) , Baltes, Lisa Marie (VerfasserIn) , Bartels, Falk (VerfasserIn) , Czurylo, Marta (VerfasserIn) , Dittmeier, Sebastian (VerfasserIn) , Dunford, Monica (VerfasserIn) , Franchino, Silvia (VerfasserIn) , Junkermann, Thomas (VerfasserIn) , Klassen, Martin (VerfasserIn) , Mkrtchyan, Tigran (VerfasserIn) , Ott, Philipp (VerfasserIn) , Rassloff, Damir Fabrice (VerfasserIn) , Rodriguez Bosca, Sergi (VerfasserIn) , Sauer, Christof (VerfasserIn) , Schöning, André (VerfasserIn) , Schultz-Coulon, Hans-Christian (VerfasserIn) , Sothilingam, Varsiha (VerfasserIn) , Stamen, Rainer (VerfasserIn) , Starovoitov, Pavel (VerfasserIn) , Vigani, Luigi (VerfasserIn) , Weber, Sebastian (VerfasserIn) , Wessels, Martin (VerfasserIn) , Zinßer, Joachim (VerfasserIn)
Körperschaft: ATLAS Collaboration (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 20 October 2023
In: Physical review letters
Year: 2023, Jahrgang: 131, Heft: 16, Pages: 1-21
ISSN:1079-7114
DOI:10.1103/PhysRevLett.131.162301
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.131.162301
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.131.162301
Volltext
Verfasserangaben:G. Aad et al. (ATLAS Collaboration*)
Beschreibung
Zusammenfassung:A key open question in the study of multiparticle production in high-energy pp collisions is the relationship between the “ridge" - i.e., the observed azimuthal correlations between particles in the underlying event that extend over all rapidities - and hard or semihard scattering processes. In particular, it is not known whether jets or their soft fragments are correlated with particles in the underlying event. To address this question, two-particle correlations are measured in pp collisions at √s=13 TeV using data collected by the ATLAS experiment at the LHC, with an integrated luminosity of 15.8 pb−1, in two different configurations. In the first case, charged particles associated with jets are excluded from the correlation analysis, while in the second case, correlations are measured between particles within jets and charged particles from the underlying event. Second-order flow coefficients, v2, are presented as a function of event multiplicity and transverse momentum. These measurements show that excluding particles associated with jets does not affect the measured correlations. Moreover, particles associated with jets do not exhibit any significant azimuthal correlations with the underlying event, ruling out hard processes contributing to the ridge.
Beschreibung:Online veröffentlicht: 16. Oktober 2023
*ATLAS Collaboration: G. Aad, L.M. Baltes, F. Bartels, M.M. Czurylo, M. Dunford, S. Franchino, T. Junkermann, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser [und 2911 weitere Personen]
Gesehen am 17.05.2024
Beschreibung:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.131.162301

Ähnliche Einträge