Naslov
Jet-like correlations with respect to K0S and Λ(Λ⎯) in pp and central Pb–Pb collisions at √sNN=5.02 TeV

Autori
Acharya, S. ; … ; Erhardt, Filip ; … ; Gotovac, Sven ; …. ; Jercic, Marko ; … ; Karatovic, David ; … ; Loncar, Petra ; … ; Planinic, Mirko ; … ; Poljak, Nikola ; … ; Vickovic, Linda ; … ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
The European Physical Journal C (1434-6052) 83 (2023), 6; 497, 20

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
heavy ion: scattering ; correlation: two-particle ; p p: scattering ; hadron ; ALICE ; trigger ; energy loss ; charged particle ; flow ; transverse momentum ; CERN LHC Coll ; Monte Carlo ; experimental results ; 5020 GeV-cms/nucleon

Sažetak
Two-particle correlations with K0S , Λ/Λ⎯, and charged hadrons as trigger particles in the transverse momentum range 8<𝑝T, trig<16 GeV/𝑐, and associated charged particles within 1<𝑝T, assoc<8 GeV/𝑐, are studied at midrapidity in pp and central Pb–Pb collisions at a centre-of-mass energy per nucleon–nucleon collision √sNN = 5.02 TeV with the ALICE detector at the LHC. After subtracting the contributions of the flow background, the per-trigger yields are extracted on both the near and away sides, and the ratio in Pb–Pb collisions with respect to pp collisions (𝐼AA) is computed. The per-trigger yield in Pb–Pb collisions on the away side is strongly suppressed to the level of 𝐼AA≈0.6 for 𝑝T, assoc>3 GeV/𝑐 as expected from strong in-medium energy loss, while an enhancement develops at low 𝑝T, assoc on both the near and away sides, reaching 𝐼AA≈1.8 and 2.7 respectively. These findings are in good agreement with previous ALICE measurements from two-particle correlations triggered by neutral pions (𝜋0–h) and charged hadrons (h–h) in Pb–Pb collisions at √sNN = 2.76 TeV. Moreover, the correlations with K0S mesons and Λ/Λ⎯ baryons as trigger particles are compared to those of inclusive charged hadrons. The results are compared with the predictions of Monte Carlo models.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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