Jet-like correlations with respect to KS<SUP>0</SUP> and Λ ((Λ)over-bar) in pp and central Pb-Pb collisions at √sNN=5.02 TeV

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초록

Two-particle correlations with K-S(0), Lambda/(Lambda) over bar, and charged hadrons as trigger particles in the transverse momentum range 8<p(T),trig<16 GeV/c, and associated charged particles within 1<p(T),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 root s(NN) = 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 (I-AA) is computed. The per-trigger yield in Pb-Pb collisions on the away side is strongly suppressed to the level of I-AA approximate to 0.6 for p(T,assoc) > 3 GeV/c as expected from strong in-medium energy loss, while an enhancement develops at low p(T), assoc on both the near and away sides, reaching I-AA approximate to 1.8 and 2.7 respectively. These findings are in good agreement with previous ALICE measurements from two-particle correlations triggered by neutral pions (pi(0)-h) and charged hadrons (h-h) in Pb-Pb collisions at root s(NN) = 2.76 TeV. Moreover, the correlations with K-S(0) mesons and Lambda/(Lambda) over bar baryons as trigger particles are compared to those of inclusive charged hadrons. The results are compared with the predictions of Monte Carlo models.

키워드

QUARK-GLUON PLASMAMULTIPLICITYSUPPRESSIONDEPENDENCE
제목
Jet-like correlations with respect to KS<SUP>0</SUP> and Λ ((Λ)over-bar) in pp and central Pb-Pb collisions at √sNN=5.02 TeV
저자
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DOI
10.1140/epjc/s10052-023-11614-8
발행일
2023-06
유형
Article
저널명
European Physical Journal C
83
6