1,064 research outputs found
Production of K<sup>0</sup><sub>S</sub> , Λ (Λ̅), Ξ<sup>±</sup>, and Ω<sup>±</sup> in jets and in the underlying event in pp and p–Pb collisions
Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at s√ = 13 TeV and in p−Pb collisions at sNN−−−√ = 5.02 TeV
Long- and short-range correlations for pairs of charged particles are studied via two-particle angular correlations in pp collisions at s√=13 TeV and p−Pb collisions at sNN−−−√=5.02 TeV. The correlation functions are measured as a function of relative azimuthal angle Δφ and pseudorapidity separation Δη for pairs of primary charged particles within the pseudorapidity interval |η|<0.9 and the transverse-momentum interval 1<pT<4 GeV/c. Flow coefficients are extracted for the long-range correlations (1.6<|Δη|<1.8) in various high-multiplicity event classes using the low-multiplicity template fit method. The method is used to subtract the enhanced yield of away-side jet fragments in high-multiplicity events. These results show decreasing flow signals toward lower multiplicity events. Furthermore, the flow coefficients for events with hard probes, such as jets or leading particles, do not exhibit any significant changes compared to those obtained from high-multiplicity events without any specific event selection criteria. The results are compared with hydrodynamic-model calculations, and it is found that a better understanding of the initial conditions is necessary to describe the results, particularly for low-multiplicity events
Measurement of the production of charm jets tagged with D0 mesons in pp collisions at √s = 5.02 and 13 TeV
Multiplicity-dependent production of Σ(1385)<sup>±</sup> and Ξ(1530)<sup>0</sup> in pp collisions at √s=13 TeV
The production yields of the Σ(1385)± and Ξ(1530)0 resonances are measured in pp collisions at √s=13 TeV with ALICE. The measurements are performed as a function of the charged particle multiplicity ⟨dNch/dη⟩, which is related to the energy density produced in the collision. The results include transverse momentum (pT) distributions, pT-integrated yields, mean transverse momenta of Σ(1385)± and Ξ(1530)0, as well as ratios of the pT-integrated resonance yields relative to yields of other hadron species. The Σ(1385)±/π± and Ξ(1530)0/π± yield ratios are consistent with the trend of the enhancement of strangeness production from low to high multiplicity pp collisions, which was previously observed for strange and multi-strange baryons. The yield ratio between the measured resonances and the long-lived baryons with the same strangeness content exhibits a hint of a mild increasing trend at low multiplicity, despite too large uncertainties to exclude the flat behaviour. The results are compared to predictions from models such as EPOS-LHC and PYTHIA 8 with Rope shoving. The latter provides the best description of the multiplicity dependence of the Σ(1385)± and Ξ(1530)0 production in pp collisions at √s=13 TeV
Multiplicity and rapidity dependence of K<sup>∗ </sup>(892)<sup>0</sup> and ϕ(1020) production in p–Pb collisions at √s<sub>NN</sub> = 5.02 TeV
Measurement of ψ (2S) production as a function of charged-particle pseudorapidity density in pp collisions at √s = 13 TeV and p–Pb collisions at √s<sub>NN</sub> = 8.16 TeV with ALICE at the LHC
Measurement of the non-prompt D-meson fraction as a function of multiplicity in proton−proton collisions at s√=13 TeV
Anisotropic flow and flow fluctuations of identified hadrons in Pb–Pb collisions at √s<sub>NN </sub> = 5.02 TeV
Jet-like correlations with respect to KKS0 and Λ (Λ¯¯¯¯) in pp and central Pb–Pb collisions at sNN−−−√=5.02sNN=5.02 TeV
Measurement of inclusive and leading subjet fragmentation in pp and Pb–Pb collisions at √s<sub>NN</sub> = 5.02 TeV
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