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공공누리This item is licensed Korea Open Government License

Title
Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at √sNN = 2.76 TeV
Author(s)
B.Abelev안상언안설아장행진
Publication Year
2014-07-15
Abstract
Transverse momentum spectra of π±π±, K±K± and p(p¯) up to pT=20 GeV/cpT=20 GeV/c at mid-rapidity in pp, peripheral (60–80%) and central (0–5%) Pb–Pb collisions at sNN=2.76 TeV have been measured using the ALICE detector at the Large Hadron Collider. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at pT≈3 GeV/cpT≈3 GeV/c in central Pb–Pb collisions. Below the peak, pT<3 GeV/cpT<3 GeV/c, both ratios are in good agreement with hydrodynamical calculations, suggesting that the peak itself is dominantly the result of radial flow rather than anomalous hadronization processes. For pT>10 GeV/cpT>10 GeV/c particle ratios in pp and Pb–Pb collisions are in agreement and the nuclear modification factors for π±π±, K±K± and p(p¯) indicate that, within the systematic and statistical uncertainties, the suppression is the same. This suggests that the chemical composition of leading particles from jets in the medium is similar to that of vacuum jets.
Keyword
Identified particle production; LHC; ALICE; Nuclear modification factor; Baryon anomaly; Particle ratios; High pT
Journal Title
Physics Letters B
ISSN
0370-2693
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Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14327
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