323 citations · 836 across the 29 of their papers we have counts for
30 papers
Perturbative QCD correction to the nonleptonic weak rate in dense quark matter
Matti Heikinheimo, Hanna Lempiäinen, Risto Paatelainen +2
We present the first calculation of the leading perturbative quantum chromodynamics (QCD) correction to the nonleptonic weak flavor-equilibration rate in dense quark matter. The co…
Static linear response of hot and dense QCD matter to electromagnetic fields: Leading hard and soft QCD corrections
Osvaldo Ferreira, Eduardo S. Fraga, Tyler Gorda +3
We compute the static electromagnetic susceptibilities of a hot and dense quark-gluon plasma using perturbative Quantum Chromodynamics (QCD). Our evaluation includes the leading $\…
QED cross sections in strong magnetic fields
Olavi Kiuru, Joonas Nättilä, Risto Paatelainen +1
The magnetospheres of magnetars, a class of highly magnetized neutron stars, host magnetic fields exceeding the Schwinger limit, where Quantum Electrodynamics (QED) becomes nonline…
A new approach to determine the thermodynamics of deconfined matter to high accuracy
Tyler Gorda, Pablo Navarrete, Risto Paatelainen +2
We demonstrate that at finite density and sufficiently high temperatures, phase-quenched (PQ) lattice simulations combined with perturbation theory provide a new precision approach…
Cosmological phase transitions without high-temperature expansions
Pablo Navarrete, Risto Paatelainen, Kaapo Seppänen +1
We introduce a new framework for perturbatively computing equilibrium thermodynamic properties of cosmological phase transitions to high loop orders, using the full four-dimensiona…
Quark matter at four loops: hardships and how to overcome them
A. Kärkkäinen, P. Navarrete, M. Nurmela +3
Knowledge of the pressure of cold and dense quark matter (QM) is known to significantly constrain the equation of state of neutron-star matter, a quantity playing a key role in dec…
Perturbative QCD meets phase quenching: The pressure of cold quark matter
Pablo Navarrete, Risto Paatelainen, Kaapo Seppänen
Nonperturbative inequalities constrain the thermodynamic pressure of Quantum Chromodynamics (QCD) with its phase-quenched version, a Sign-Problem-free theory amenable to lattice tr…
Estimate for the bulk viscosity of strongly coupled quark matter using perturbative QCD and holography
Jesús Cruz Rojas, Tyler Gorda, Carlos Hoyos +6
Modern hydrodynamic simulations of core-collapse supernovae and neutron-star mergers require knowledge not only of the equilibrium properties of strongly interacting matter, but al…
Soft gluon self-energy at finite temperature and density: hard NLO corrections in general covariant gauge
Tyler Gorda, Risto Paatelainen, Saga Säppi +1
We compute the next-to-leading order (NLO) hard correction to the gluon self-energy tensor with arbitrary soft momenta in a hot and/or dense weakly coupled plasma in Quantum Chromo…
Snowmass 2021 Cosmic Frontier White Paper: The Dense Matter Equation of State and QCD Phase Transitions
Slavko Bogdanov, Emmanuel Fonseca, Rahul Kashyap +26
Our limited understanding of the physical properties of matter at ultra-high density, high proton/neutron number asymmetry, and low temperature is presently one of the major outsta…
Degenerate fermionic matter at NLO: Quantum Electrodynamics
Tyler Gorda, Aleksi Kurkela, Juuso Österman +5
We determine the pressure of a cold and dense electron gas to a nearly complete next-to-next-to-next-to-leading order (NLO) in the fine-structure constant , utilizing a ne…
Temperature dependence of of strongly interacting matter: effects of the equation of state and the parametric form of
Jussi Auvinen, Kari J. Eskola, Pasi Huovinen +3
We investigate the temperature dependence of the shear viscosity to entropy density ratio using a piecewise linear parametrization. To determine the optimal values of the par…
Gluon Radiation from a Classical Point Particle
Keijo Kajantie, Larry D. McLerran, Risto Paatelainen
We consider an initially at rest colored particle which is struck by an ultra-relativistic nucleus. The particle is treated classically both with respect to its motion and its colo…
Constraining energy loss from high- azimuthal asymmetries
Carlota Andres, Néstor Armesto, Harri Niemi +2
The nuclear modification factor has been satisfactorily described by various jet quenching models. Nonetheless, all these formalisms, until very recently, underpredict…
Jet quenching as a probe of the initial stages in heavy-ion collisions
Carlota Andres, Néstor Armesto, Harri Niemi +2
Jet quenching provides a very flexible variety of observables which are sensitive to different energy- and time-scales of the strongly interacting matter created in heavy-ion colli…
Temperature dependence of : uncertainties from the equation of state
Jussi Auvinen, Kari J. Eskola, Pasi Huovinen +3
We perform a global model-to-data comparison on Au+Au collisions at GeV and Pb+Pb collisions at TeV and TeV, using a 2+1D hydrodynamics model with…
Latest predictions from the EbyE NLO EKRT model
Harri Niemi, Kari J. Eskola, Risto Paatelainen +1
We present the latest results from the NLO pQCD + saturation + viscous hydrodynamics (EbyE NLO EKRT) model. The parameters in the EKRT saturation model are fixed by the charged had…
Predictions for multiplicities and flow harmonics in 5.44 TeV Xe+Xe collisions at the CERN Large Hadron Collider
K. J. Eskola, H. Niemi, R. Paatelainen +1
We present the next-to-leading-order event-by-event EKRT model predictions for the centrality dependence of the charged hadron multiplicity in the pseudorapidity interval $|η|\le 0…
Extracting in event-by-event hydrodynamics and the centrality/energy puzzle
Carlota Andres, Nestor Armesto, Harri Niemi +3
In our analysis, we combine event-by-event hydrodynamics, within the EKRT formulation, with jet quenching -ASW Quenching Weights- to obtain high- for charged part…
Latest results from the EbyE NLO EKRT model
Kari J. Eskola, Harri Niemi, Risto Paatelainen +1
We review the results from the event-by-event next-to-leading order perturbative QCD + saturation + viscous hydrodynamics (EbyE NLO EKRT) model. With a simultaneous analysis of LHC…
Predictions for 5.023 TeV Pb+Pb collisions at the LHC
H. Niemi, K. J. Eskola, R. Paatelainen +1
We compute predictions for various low-transverse-momentum bulk observables in TeV Pb+Pb collisions at the LHC from the event-by-event next-to-leading-order…
Pinning down QCD-matter shear viscosity in ultrarelativistic heavy-ion collisions via EbyE fluctuations using pQCD + saturation + hydrodynamics
K. J. Eskola, H. Niemi, R. Paatelainen
We introduce an event-by-event pQCD + saturation + hydro ("EKRT") framework for high-energy heavy-ion collisions, where we compute the produced fluctuating QCD-matter energy densit…
Event-by-event fluctuations in perturbative QCD + saturation + hydro model: pinning down QCD matter shear viscosity in ultrarelativistic heavy-ion collisions
H. Niemi, K. J. Eskola, R. Paatelainen
We introduce an event-by-event perturbative-QCD + saturation + hydro ("EKRT") framework for ultrarelativistic heavy-ion collisions, where we compute the produced fluctuating QCD-ma…
Minijet initial state of heavy-ion collisions from next-to-leading order perturbative QCD
Risto Paatelainen
The aim of this thesis is to calculate field-theoretically as rigorously as possible the initial state of partonic matter produced in ultrarelativistic heavy-ion collisions at CERN…