Jet-like correlations with respect to KS0 and Λ (Λ ¯) in pp and central Pb–Pb collisions at √sNN=5.02 TeV

Summary, in English

Two-particle correlations with KS0 , 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 (π –h) and charged hadrons (h–h) in Pb–Pb collisions at sNN=2.76 TeV. Moreover, the correlations with KS0 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. © 2023, The Author(s).

• Author: S. Acharya; S. Basu; P. Christiansen; O. Matonoha; A.F. Nassirpour; A. Ohlson; O.V. Rueda; D. Silvermyr; J. Staa; N. Zurlo
• Department/s: Particle and nuclear physics
• Publishing year: 2023
• Language: English
• Publication/Series: European Physical Journal C
• Volume: 83
• Issue: 6
• Links: http://dx.doi.org/10.1140/epjc/s10052-023-11614-8
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 1434-6044