A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Non-linear flow modes of identified particles in Pb-Pb collisions at √sNN = 5.02 TeV (2020)


ALICE collaboration (2020). Non-linear flow modes of identified particles in Pb-Pb collisions at √sNN = 5.02 TeV. Journal of High Energy Physics, 2020 (6), 147. DOI: 10.1007/JHEP06(2020)147


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: ALICE collaboration

Lehti tai sarja: Journal of High Energy Physics

ISSN: 1126-6708

eISSN: 1029-8479

Julkaisuvuosi: 2020

Volyymi: 2020

Lehden numero: 6

Artikkelinumero: 147

Kustantaja: Springer

Julkaisumaa: Saksa

Julkaisun kieli: englanti

DOI: http://doi.org/10.1007/JHEP06(2020)147

Avoin saatavuus: Open access -julkaisukanavassa ilmestynyt julkaisu

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/71046

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/1912.00740


Tiivistelmä

The pT-differential non-linear flow modes, v4,22, v5,32, v6,33 and v6,222 for π±, K±, K0S , p + p¯¯¯, Λ + Λ¯¯¯¯ and ϕ-meson have been measured for the first time at sNN−−−√ = 5.02 TeV in Pb-Pb collisions with the ALICE detector at the Large Hadron Collider. The results were obtained with a multi-particle technique, correlating the identified hadrons with reference charged particles from a different pseudorapidity region. These non-linear observables probe the contribution from the second and third order initial spatial anisotropy coefficients to higher flow harmonics. All the characteristic features observed in previous pT-differential anisotropic flow measurements for various particle species are also present in the non-linear flow modes, i.e. increase of magnitude with increasing centrality percentile, mass ordering at low pT and particle type grouping in the intermediate pT range. Hydrodynamical calculations (iEBE-VISHNU) that use different initial conditions and values of shear and bulk viscosity to entropy density ratios are confronted with the data at low transverse momenta. These calculations exhibit a better agreement with the anisotropic flow coefficients than the non-linear flow modes. These observations indicate that non-linear flow modes can provide additional discriminatory power in the study of initial conditions as well as new stringent constraints to hydrodynamical calculations.


YSO-asiasanat: hiukkasfysiikka

Vapaat asiasanat: heavy ion experiments


Liittyvät organisaatiot

JYU-yksiköt:


OKM-raportointi: Kyllä


Viimeisin päivitys 2020-03-07 klo 11:24