Effects of saturation and fluctuating hotspots for flow observables in ultrarelativistic heavy-ion collisions
Hirvonen, H., Kuha, M., Auvinen, J., Eskola, K. J., Kanakubo, Y., & Niemi, H. (2024). Effects of saturation and fluctuating hotspots for flow observables in ultrarelativistic heavy-ion collisions. Physical Review C, 110(3), Article 034911. https://doi.org/10.1103/physrevc.110.034911
Julkaistu sarjassa
Physical Review CTekijät
Päivämäärä
2024Tekijänoikeudet
© Authors. Published by the American Physical Society
We investigate the effects of saturation dynamics on midrapidity flow observables by adding fluctuating hotspots into the novel Monte Carlo EKRT (MC-EKRT) event generator for high-energy nuclear collisions. We demonstrate that the intensity of the saturation effects significantly affects the ratio between the flow coefficients 𝑣3 and 𝑣2 at the LHC. Adding a hotspot substructure to the nucleons enhances the saturation effects and improves the agreement with the measured data. We show that the collision-energy dependence of the flow coefficients obtained using the MC-EKRT initial states with hotspots is improved in comparison with the earlier event-by-event EKRT model. In addition, we present the results for the charged hadron multiplicity distribution in Pb+Pb collisions at the LHC, and show that the minijet multiplicity originating fluctuations of the saturation scale included in MC-EKRT, as well as the presence of hotspots, are necessary for describing the measured large-multiplicity tail in the distribution.
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Julkaisija
American Physical Society (APS)ISSN Hae Julkaisufoorumista
2469-9985Asiasanat
Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/243150949
Metadata
Näytä kaikki kuvailutiedotKokoelmat
Rahoittaja(t)
Euroopan komissio; Suomen AkatemiaRahoitusohjelmat(t)
Huippuyksikkörahoitus, SA; Akatemiahanke, SA
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Lisätietoja rahoituksesta
We acknowledge the financial support from the Vilho, Yrjö and Kalle Väisälä Foundation (M.K.) and from the Jenny and Antti Wihuri Foundation (H.H.), and the Academy of Finland Project No. 330448 (K.J.E.). This research was funded as a part of the Center of Excellence in Quark Matter of the Academy of Finland (Projects No. 346325 and No. 364192). This research is part of the European Research Council Project No. ERC-2018-ADG-835105 YoctoLHC, and the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 824093 (STRONG-2020). We acknowledge the computation resources from the Finnish IT Center for Science (CSC), project jyy2580, and from the Finnish Computing Competence Infrastructure (FCCI), persistent identifier urn:nbn:fi:research-infras-2016072533. ...Lisenssi
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