Neutral to charged kaon yield fluctuations in Pb - Pb collisions at , √SNN=2.76 TeV

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초록

We present the first measurement of event-by-event fluctuations in the kaon sector in Pb - Pb collisions at root S-NN = 2.76 TeV with the ALICE detector at the LHC. The robust fluctuation correlator nu(dyn) is used to evaluate the magnitude of fluctuations of the relative yields of neutral and charged kaons, as well as the relative yields of charged kaons, as a function of collision centrality and selected kinematic ranges. While the correlator nu(dyn) [K+,K-] exhibits a scaling approximately in inverse proportion of the charged particle multiplicity, nu(dyn)[K-S(0),K-+/-] features a significant deviation from such scaling. Within uncertainties, the value of nu(dyn) [K-S(0), K-+/-] is independent of the selected transverse momentum interval, while it exhibits a pseudorapidity dependence. The results are compared with HIJING, AMPT and EPOS-LHC predictions, and are further discussed in the context of the possible production of disoriented chiral condensates in central Pb - Pb collisions. (C) 2022 European Organization for Nuclear Research, ALICE. Published by Elsevier B.V.

키워드

HEAVY-ION COLLISIONSQCDLHC
제목
Neutral to charged kaon yield fluctuations in Pb - Pb collisions at , √SNN=2.76 TeV
저자
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DOI
10.1016/j.physletb.2022.137242
발행일
2022-09-10
유형
Article
저널명
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
832