636 citations · 7.6k across the 160 of their papers we have counts for
146 papers · 1 filter
MC-EKRT: Monte Carlo event generator with saturated minijet production for initializing 3+1 D fluid dynamics in high energy nuclear collisions
Harri Niemi, Jussi Auvinen, Kari J. Eskola +3
We present a novel saturation and leading order collinear factorization based Monte-Carlo implementation of the EKRT model for computing QCD matter initial states in high-energy nu…
Dijet photoproduction and transverse-plane geometry in ultra-peripheral nucleus-nucleus collisions
Kari J. Eskola, Vadim Guzey, Ilkka Helenius +2
We present new NLO pQCD predictions for the inclusive photoproduction of dijets in ultra-peripheral (UPC) lead-lead collisions at 5.02 TeV with a realistic impact-parameter depende…
Effects of saturation and fluctuating hotspots for flow observables in ultrarelativistic heavy-ion collisions
Henry Hirvonen, Mikko Kuha, Jussi Auvinen +3
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-…
MC-EKRT: Monte Carlo event generator with saturated minijet production for initializing 3+1 D fluid dynamics in high energy nuclear collisions
Mikko Kuha, Jussi Auvinen, Kari J. Eskola +3
We present a novel Monte-Carlo implementation of the EKRT model, MC-EKRT, for computing partonic initial states in high-energy nuclear collisions. Our new MC-EKRT event generator i…
Collision geometry in UPC dijet production
Kari J. Eskola, Vadim Guzey, Ilkka Helenius +2
We present a comprehensive NLO pQCD study on inclusive dijet photoproduction in ultraperipheral nucleus-nucleus collisions (UPCs). Our analysis takes into account the finite size o…
Deep learning for flow observables in high energy heavy-ion collisions
H. Hirvonen, K. J. Eskola, H. Niemi
We demonstrate how deep convolutional neural networks can be trained to predict 2+1 D hydrodynamic simulation results for flow coefficients, mean-transverse-momentum and charged pa…
Spatial resolution of dijet photoproduction in near-encounter ultraperipheral nuclear collisions
Kari J. Eskola, Vadim Guzey, Ilkka Helenius +2
We present next-to-leading order perturbative QCD predictions for inclusive dijet photoproduction in ultra-peripheral nucleus-nucleus collisions (UPCs) within the impact-parameter…
Illuminating the impact-parameter dependence of UPC dijet photoproduction
Kari J. Eskola, Vadim Guzey, Ilkka Helenius +2
We present new NLO pQCD predictions for photoproduction of dijets in ultraperipheral PbPb collisions at 5.02 TeV with a realistic photon flux and up-to-date nuclear PDFs. Our calcu…
Exclusive quarkonium photoproduction in + UPCs at the LHC in NLO pQCD
Kari J. Eskola, Christopher A. Flett, Vadim Guzey +2
We present the first study of coherent exclusive quarkonium (, ) photoproduction in ultraperipheral nucleus-nucleus collisions (UPCs) at the LHC in the framework of colline…
Exclusive heavy vector meson photoproduction on nuclei in NLO perturbative QCD
K. J. Eskola, V. Guzey, T. Löytäinen +2
We make predictions for the cross section of coherent photoproduction in Pb-Pb and O-O ultraperipheral collisions (UPCs) at the LHC as a function of the rapidity in…
Deep learning for flow observables in ultrarelativistic heavy-ion collisions
H. Hirvonen, K. J. Eskola, H. Niemi
We train a deep convolutional neural network to predict hydrodynamic results for flow coefficients, average transverse momenta and charged particle multiplicities in ultrarelativis…
Next-to-leading order perturbative QCD predictions for exclusive photoproduction in oxygen-oxygen and lead-lead collisions at the LHC
Kari J. Eskola, Christopher A. Flett, Vadim Guzey +2
We present predictions for the cross sections of coherent photoproduction in lead-lead and oxygen-oxygen ultraperipheral collisions (UPCs) as a function of the rapidity…
Exclusive production in ultraperipheral Pb+Pb collisions to NLO pQCD
K. J. Eskola, C. A. Flett, V. Guzey +2
We present the first NLO pQCD study of coherent exclusive photoproduction in ultraperipheral heavy-ion collisions (UPCs) at the LHC. Taking the generalized parton distributio…
Next-to-leading order QCD predictions for exclusive photoproduction in ultraperipheral Pb+Pb collisions at the LHC
Kari J. Eskola, Chris A. Flett, Vadim Guzey +2
We present the first study of rapidity-differential cross sections of coherent exclusive photoproduction in heavy-ion ultraperipheral collisions (UPCs) at the LHC, $\text{d}σ…
Flow correlations from a hydrodynamics model with dynamical freeze-out and initial conditions based on perturbative QCD and saturation
H. Hirvonen, K. J. Eskola, H. Niemi
We extend the applicability of the hydrodynamics, perturbative QCD and saturation -based EKRT (Eskola-Kajantie-Ruuskanen-Tuominen) framework for ultrarelativistic heavy-ion collisi…
Exclusive photoproduction in ultraperipheral Pb+Pb collisions at the LHC to next-to-leading order perturbative QCD
Kari J. Eskola, Christopher A. Flett, Vadim Guzey +2
We present the first next-to-leading-order (NLO) perturbative QCD (pQCD) study of rapidity-differential cross sections of coherent exclusive photoproduction of mesons in heav…
Proton-PDF uncertainties in extracting nuclear PDFs from production in p+Pb collisions
Kari J. Eskola, Petja Paakkinen, Hannu Paukkunen +1
We discuss the recent CMS Collaboration measurement of boson production in p+Pb collisions at 8.16 TeV in terms of the constraining power on nuclear parton distribution fun…
EPPS21: A global QCD analysis of nuclear PDFs
Kari J. Eskola, Petja Paakkinen, Hannu Paukkunen +1
We present an updated global analysis of collinearly factorized nuclear parton distribution functions (PDFs) at next-to-leading order in perturbative QCD. In comparison to our prev…
Towards EPPS21 nuclear PDFs
Kari J. Eskola, Petja Paakkinen, Hannu Paukkunen +1
We report on the progress in updating our global analysis of nuclear PDFs. In particular, we will discuss the inclusion of double differential 5.02 TeV dijet and D-meson measuremen…
Evidence of shadowing in inelastic nucleon-nucleon cross section
Kari J. Eskola, Ilkka Helenius, Mikko Kuha +1
The Glauber modeling plays a key role in centrality-dependent measurements of heavy-ion collisions. A central input parameter in Glauber models is the inelastic nucleon-nucleon cro…
Shadowing in inelastic nucleon-nucleon cross section?
Kari J. Eskola, Ilkka Helenius, Mikko Kuha +1
Experimental results of inclusive hard-process cross sections in heavy-ion collisions conventionally lean on a normalization computed from Glauber models where the inelastic nucleo…
Impact of dijet and D-meson data from 5.02 TeV p+Pb collisions on nuclear PDFs
Kari J. Eskola, Ilkka Helenius, Petja Paakkinen +1
We discuss the new constraints on gluon parton distribution function (PDF) in lead nucleus, derivable with the Hessian PDF reweighting method from the 5.02 TeV p+Pb measurements of…
Constraints for nuclear PDFs from the LHCb D-meson data
Kari J. Eskola, Ilkka Helenius, Petja Paakkinen +1
We quantify the impact of LHCb D-meson measurements at on the EPPS16 and nCTEQ15 nuclear PDFs. In our study, the theoretical description of D-meson produc…
A QCD analysis of LHCb D-meson data in p+Pb collisions
Kari J. Eskola, Ilkka Helenius, Petja Paakkinen +1
We scrutinize the recent LHCb data for D-meson production in p+Pb collisions within a next-to-leading order QCD framework. Our calculations are performed in the SACOT-$m_{\rm T…