Two-particle correlations with K0S, v/v-, and charged hadrons as trigger particles in the transverse momen- tum range 8<16 GeV/c, and associated charged par- ticles within 1<8 GeV/c, are studied at midrapid- ity 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 pre- vious ALICE measurements from two-particle correlations triggered by neutral pions (π 0 –h) and charged hadrons (h– h) in Pb–Pb collisions at √sNN = 2.76 TeV. Moreover, the correlations with KS0 mesons and v/v- baryons as trigger particles are compared to those of inclusive charged hadrons. The results are compared with the predictions of Monte Carlo models.
Jet-like correlations with respect to KS0 and Λ (Λ ¯) in pp and central Pb–Pb collisions at √sNN=5.02 TeV
Balbino, A.;Beole, S.;Bianchi, L.;Botta, E.;Ferretti, A.;Gagliardi, M.;Lim, B.;Masera, M.;Mazzaschi, F.;Pennisi, M.;Pucillo, S.;Sitta, M.;Terlizzi, L.;Trogolo, S.;Vercellin, E.;
2023-01-01
Abstract
Two-particle correlations with K0S, v/v-, and charged hadrons as trigger particles in the transverse momen- tum range 8<16 GeV/c, and associated charged par- ticles within 1<8 GeV/c, are studied at midrapid- ity 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 pre- vious ALICE measurements from two-particle correlations triggered by neutral pions (π 0 –h) and charged hadrons (h– h) in Pb–Pb collisions at √sNN = 2.76 TeV. Moreover, the correlations with KS0 mesons and v/v- baryons as trigger particles are compared to those of inclusive charged hadrons. The results are compared with the predictions of Monte Carlo models.File | Dimensione | Formato | |
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