A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
General balance functions of identified charged hadron pairs of (π,K,p) in Pb–Pb collisions at √sNN = 2.76 TeV (2022)
ALICE Collaboration. (2022). General balance functions of identified charged hadron pairs of (π,K,p) in Pb–Pb collisions at √sNN = 2.76 TeV. Physics Letters B, 833, Article 137338. https://doi.org/10.1016/j.physletb.2022.137338
JYU-tekijät tai -toimittajat
 | |
| |
| |
| |
| |
| |
| |
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: ALICE Collaboration
Lehti tai sarja: Physics Letters B
ISSN: 0370-2693
eISSN: 1873-2445
Julkaisuvuosi: 2022
Ilmestymispäivä: 21.07.2022
Volyymi: 833
Artikkelinumero: 137338
Kustantaja: Elsevier BV
Julkaisumaa: Alankomaat
Julkaisun kieli: englanti
DOI: https://doi.org/10.1016/j.physletb.2022.137338
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/83227
Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2110.06566
Tiivistelmä
First measurements of balance functions (BFs) of all combinations of identified charged hadron (π,K,p) pairs in Pb−Pb collisions at √sNN = 2.76 TeV recorded by the ALICE detector are presented. The BF measurements are carried out as two-dimensional differential correlators versus the relative rapidity (Δy) and azimuthal angle (Δφ) of hadron pairs, and studied as a function of collision centrality. The Δφ dependence of BFs is expected to be sensitive to the light quark diffusivity in the quark−gluon plasma. While the BF azimuthal widths of all pairs substantially decrease from peripheral to central collisions, the longitudinal widths exhibit mixed behaviors: BFs of ππ and cross-species pairs narrow significantly in more central collisions, whereas those of KK and pp are found to be independent of collision centrality. This dichotomy is qualitatively consistent with the presence of strong radial flow effects and the existence of two stages of quark production in relativistic heavy-ion collisions. Finally, the first measurements of the collision centrality evolution of BF integrals are presented, with the observation that charge balancing fractions are nearly independent of collision centrality in Pb−Pb collisions. Overall, the results presented provide new and challenging constraints for theoretical models of hadron production and transport in relativistic heavy-ion collisions.
YSO-asiasanat: hiukkasfysiikka; kvarkki-gluoniplasma
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2022
JUFO-taso: 2
