Zobrazeno 1 - 10
of 504
pro vyhledávání: '"Niemi, H."'
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 particle multiplicity from the initial energy density profile. We show t
Externí odkaz:
http://arxiv.org/abs/2404.02602
We train a deep convolutional neural network to predict hydrodynamic results for flow coefficients, average transverse momenta and charged particle multiplicities in ultrarelativistic heavy-ion collisions from the initial energy density profiles. We
Externí odkaz:
http://arxiv.org/abs/2303.04517
Publikováno v:
Phys. Rev. C 106, 044913 (2022)
We extend the applicability of the hydrodynamics, perturbative QCD and saturation -based EKRT (Eskola-Kajantie-Ruuskanen-Tuominen) framework for ultrarelativistic heavy-ion collisions to peripheral collisions by introducing dynamical freeze-out condi
Externí odkaz:
http://arxiv.org/abs/2206.15207
Autor:
Niemi, H. (Henri)
Tässä työssä tutkittiin valmistus- ja kokoonpanoystävällisen suunnitteluperiaatteen soveltamista ultralujista teräksistä valmistettujen keveiden rakenteiden suunnittelussa. Työn tärkein tavoite oli selvittää, millaisen suunnitteluprosessi
Externí odkaz:
http://urn.fi/URN:NBN:fi:oulu-201803081329
Publikováno v:
Phys. Rev. C 98, 024912 (2018)
[Background] Experimental data from heavy-ion experiments at RHIC-BNL and LHC-CERN are quantitatively described using relativistic fluid dynamics. Even p+A and p+p collisions show signs of collective behavior describable in the same manner. Neverthel
Externí odkaz:
http://arxiv.org/abs/1804.09512
Publikováno v:
Phys. Rev. C 97, 034911 (2018)
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 $|\eta|\le 0.5$, and for the centrality dependence of the charged hadron flow h
Externí odkaz:
http://arxiv.org/abs/1711.09803
We study anisotropic fluid dynamics derived from the Boltzmann equation based on a particular choice for the anisotropic distribution function within a boost-invariant expansion of the fluid in one spatial dimension. In order to close the conservatio
Externí odkaz:
http://arxiv.org/abs/1705.01851
Hydrodynamic modeling of a pure-glue initial scenario in high-energy hadron and heavy-ion collisions
Autor:
Vovchenko, V., Pang, Long-Gang, Niemi, H., Karpenko, Iu. A., Gorenstein, M. I., Satarov, L. M., Mishustin, I. N., Kämpfer, B., Stoecker, H.
Partonic matter produced in the early stage of ultrarelativistic nucleus-nucleus collisions is assumed to be composed mainly of gluons, and quarks and antiquarks are produced at later times. The comparable hydrodynamic simulations of heavy-ion collis
Externí odkaz:
http://arxiv.org/abs/1608.04318
Publikováno v:
Phys. Rev. D 93, 114025 (2016)
Fluid-dynamical equations of motion can be derived from the Boltzmann equation in terms of an expansion around a single-particle distribution function which is in local thermodynamical equilibrium, i.e., isotropic in momentum space in the rest frame
Externí odkaz:
http://arxiv.org/abs/1602.00573
We compute the initial energy densities produced in ultrarelativistic heavy-ion collisions from NLO perturbative QCD using a saturation conjecture to control soft particle production, and describe the subsequent space-time evolution of the system wit
Externí odkaz:
http://arxiv.org/abs/1512.05132