Naslov
Phase-space dependence of particle-ratio fluctuations in Pb plus Pb collisions from 20A to 158A GeV beam energy

Autori
Antičić, Tome ; ... ; Kadija, Krešo ; ... ; Šuša, Tatjana ; ... ; Wojtaszek-Szwarc, A.

Kolaboracija
NA49 Collaboration

Izvornik
Physical review. C, Nuclear physics (0556-2813) 89 (2014), 5; 054902, 13

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

Ključne riječi
nuclear experiment (nucl-ex) ; high energy physics - experiment (hep-ex)

Sažetak
A novel approach, the identity method, was used for particle identification and the study of fluctuations of particle yield ratios in Pb+Pb collisions at the CERN Super Proton Synchrotron (SPS). This procedure allows to unfold the moments of the unknown multiplicity distributions of protons (p), kaons (K), pions (π) and electrons (e). Using these moments the excitation function of the fluctuation measure ν\text{; ; ; dyn}; ; ; [A, B] was measured, with A and B denoting different particle types. The obtained energy dependence of νdyn agrees with previously published NA49 results on the related measure σdyn. Moreover, νdyn was found to depend on the phase space coverage for [K, p] and [K, π] pairs. This feature most likely explains the reported differences between measurements of NA49 and those of STAR in central Au+Au collisions.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
NA49 Collaboration.

POVEZANOST RADA