Naslov
Neutral to charged kaon yield fluctuations in Pb – Pb collisions at √sNN=2.76 TeV

Autori
Acharya, S. ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Karatović, David ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Vicković, Linda ; ... ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
Physics letters B (0370-2693) 832 (2022); 137242, 12

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
charged particle: multiplicity ; condensation: chiral ; K: yield ; heavy ion: scattering ; yield: fluctuation ; correlation function: fluctuation ; scaling ; ALICE ; transverse momentum ; CERN LHC Coll ; rapidity ; experimental results ; 2760 GeV-cms/nucleon

Sažetak
We present the first measurement of event-by-event fluctuations in the kaon sector in Pb – Pb collisions at √sNN = 2.76 TeV with the ALICE detector at the LHC. The robust fluctuation correlator νdyn 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 νdyn[K+, K−] exhibits a scaling approximately in inverse proportion of the charged particle multiplicity, νdyn[K0S, K±] features a significant deviation from such scaling. Within uncertainties, the value of νdyn[K0S, 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA