Measurement of flow harmonics correlations with mean transverse momentum in lead–lead and proton–lead collisions at √ sNN = 5.02 TeV with the ATLAS detector
Metadatos
Afficher la notice complèteEditorial
Springer Nature
Date
2019-11-13Referencia bibliográfica
Aad, G., Abbott, B., Abbott, D.C. et al. Measurement of flow harmonics correlations with mean transverse momentum in lead–lead and proton–lead collisions at \(\sqrt{s_{\mathrm{NN}}} = 5.02~\hbox {TeV}\) with the ATLAS detector. Eur. Phys. J. C 79, 985 (2019).
Patrocinador
We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS,MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR;MESTD, Serbia; MSSR, Slovakia; ARRS andMIZŠ, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, CRC and Compute Canada, Canada; COST, ERC, ERDF, Horizon 2020, and Marie Skłodowska-Curie Actions, European Union; Investissements d’ Avenir Labex and Idex, ANR, France; DFG and AvH Foundation, Germany; Herakleitos,Thales and Aristeia programmes co-financed by EUESF and the Greek NSRF, Greece; BSF-NSF and GIF, Israel; CERCA Programme Generalitat de Catalunya, Spain; The Royal Society and Leverhulme Trust, United Kingdom.Résumé
To assess the properties of the quark–gluon
plasma formed in ultrarelativistic ion collisions, the ATLAS
experiment at the LHC measures a correlation between the
mean transverse momentum and the flow harmonics. The
analysis uses data samples of lead–lead and proton–lead collisions
obtained at the centre-of-mass energy per nucleon
pair of 5.02 TeV, corresponding to total integrated luminosities
of 22 μb−1 and 28 nb−1, respectively. The measurement
is performed using a modified Pearson correlation coefficient
with the charged-particle tracks on an event-by-event
basis. The modified Pearson correlation coefficients for the
2nd-, 3rd-, and 4th-order flow harmonics are measured in the
lead–lead collisions as a function of event centrality quantified
as the number of charged particles or the number of
nucleons participating in the collision. Themeasurements are
performed for several intervals of the charged-particle transverse
momentum. The correlation coefficients for all studied
harmonics exhibit a strong centrality evolution, which only
weakly depends on the charged-particle momentum range.
In the proton–lead collisions, the modified Pearson correlation
coefficient measured for the 2nd-order flow harmonics
shows only weak centrality dependence. The lead-lead data
is qualitatively described by the predictions based on the
hydrodynamical model.