Lévy-stable two-pion Bose-Einstein correlations in √sNN = 200 GeV Au+Au collisions

Znanstveni rad - Izvorni znanstveni rad

• Autor: A. Adare
• Autor: ...
• Autor: Mihael Makek; MBZ: 256122
• Autor: ...
• Autor: L. Zou
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

We present a detailed measurement of charged two- pion correlation functions in 0–30% centrality √sNN=200 GeV Au+Au collisions by the PHENIX experiment at the Relativistic Heavy Ion Collider. The data are well described by Bose- Einstein correlation functions stemming from Lévy-stable source distributions. Using a fine transverse momentum binning, we extract the correlation strength parameter λ, the Lévy index of stability α, and the Lévy length scale parameter R as a function of average transverse mass of the pair mT. We find that the positively and the negatively charged pion pairs yield consistent results, and their correlation functions are represented, within uncertainties, by the same Lévy-stable source functions. The λ(mT) measurements indicate a decrease of the strength of the correlations at low mT. The Lévy length scale parameter R(mT) decreases with increasing mT, following a hydrodynamically predicted type of scaling behavior. The values of the Lévy index of stability α are found to be significantly lower than the Gaussian case of α=2, but also significantly larger than the conjectured value that may characterize the critical point of a second-order quark-hadron phase transition.

• Ključne riječi (engleski): Bose-Einstein correlations; Quark-gluon plasma; Au+Au collisions; 200 GeV; PHENIX; RHIC
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review C
• Brojčani podaci: vol. 97, br. 6, 064911
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.97.064911
• URN:NBN: urn:nbn:hr:217:000587
• Datum objave publikacije: 2018
• URL dokumenta: https://journals.aps.org/prc/abstract/10.1103/PhysRevC.97.064911
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2018 American Physical Society. Received 19 September 2017; published 14 June 2018.
• Datum i vrijeme pohrane: 2020-03-01 17:31:08