Underlying event properties in pp collisions at √s = 13 TeV
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
Published inJournal of High Energy Physics
© 2020 The Authors
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 ...
Publication in research information system
MetadataShow full item record
Additional information about fundingThe ALICE Collaboration acknowledges the funding agencies for their support in building and running the ALICE detector.
Showing items with similar title or keywords.
Jet fragmentation transverse momentum measurements from di-hadron correlations in √s = 7 TeV pp and √sNN = 5.02 TeV p–Pb collisions ALICE Collaboration (Springer, 2019)The transverse structure of jets was studied via jet fragmentation transverse momentum (jT) distributions, obtained using two-particle correlations in proton-proton and proton-lead collisions, measured with the ALICE ...
Measurement of electrons from heavy-flavour hadron decays as a function of multiplicity in p-Pb collisions at √sNN = 5.02 TeV ALICE collaboration (Springer, 2020)The multiplicity dependence of electron production from heavy-flavour hadron decays as a function of transverse momentum was measured in p-Pb collisions at √sNN = 5.02 TeV using the ALICE detector at the LHC. The measurement ...
Event-Shape Engineering for the D-meson elliptic flow in mid-central Pb-Pb collisions at sNN−−−√=5.02 TeV ALICE Collaboration; Chang, BeomSu; Kim, Dong Jo; Parkkila, Jasper; Rak, Jan; Räsänen, Sami; Slupecki, Maciej; Snellman, Tomas; Trzaska, Wladyslaw; Vargyas, Márton; Viinikainen, Jussi (Springer, 2019)The production yield of prompt D mesons and their elliptic flow coefficient v2 were measured with the Event-Shape Engineering (ESE) technique applied to mid-central (10–30% and 30–50% centrality classes) Pb-Pb collisions ...
Rapidity and transverse-momentum dependence of the inclusive J/ψ nuclear modification factor in p-Pb collisions at √ sNN = 5.02 TeV ALICE Collaboration (Springer Berlin Heidelberg, 2015)We have studied the transverse-momentum (pT) dependence of the inclusive J/ψ production in p-Pb collisions at √ sNN = 5.02 TeV, in three center-of-mass rapidity (ycms) regions, down to zero pT. Results in the forward ...
ALICE Collaboration; Chang, BeomSu; Kim, Dong Jo; Rak, Jan; Räsänen, Sami; Slupecki, Maciej; Snellman, Tomas; Trzaska, Wladyslaw; Vargyas, Márton; Viinikainen, Jussi (Springer Berlin Heidelberg, 2016)The measurement of prompt D-meson production as a function of multiplicity in p–Pb collisions at √ sNN = 5.02 TeV with the ALICE detector at the LHC is reported. D0 , D+ and D∗+ mesons are reconstructed via their ...