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Názov Hybrid model with viscous relativistic hydrodynamics: a role of constraints on the shear-stress tensor Aut.údaje A. S. Khvorostukhin ... [et al.] Autor Khvorostukhin A. S. (34%)
Spoluautori Kolomeitsev Evgeni E. 1970- (33%) UMBFP06 - Katedra fyziky
Toneev V. D. (33%)
Zdroj.dok. The European Physical Journal A : Hadrons and Nuclei. Vol. 57, no. 10 (2021), pp. 294-1-294-25. - New York : Springer Nature, 2021 Kľúč.slová relativistic hydrodynamics heavy ion collisions viscosity Form.deskr. články - journal articles Jazyk dok. angličtina Krajina Nemecko Anotácia We present the hybrid model connecting the parton–hadron–string dynamic model (PHSD) and a hydrodynamic model taking into account shear viscosity within the Israel–Stewart approach. The numerical scheme, initialization, and particlization procedure are discussed in detail. The performance of the code is tested on the pion and proton rapidity and transverse mass distributions calculated for Au + Au and Pb+Pb collisions at AGS–SPS energies. The influence of the switch time from transport to hydro models, the viscous parameter, and freeze-out time are discussed. Since the applicability of the Israel–Stewart hydrodynamics assumes the perturbative character of the viscous stress tensor, πμν, which should not exceed the ideal energy–momentum tensor, T μν id , hydrodynamical codes usually rescale the shear stress tensor if the inequality πμν T μν id is not fulfilled in some sense. There are several conditions used in the literature and we analyze in detail the influence of different conditions and values of the cut-off parameter on observables.We show that the form of the corresponding condition plays an important role in the sensitivity of hydrodynamic calculations to the viscous parameter – a ratio of the shear viscosity to the entropy density, η/s. It is shown that the constraints used in the vHLLE and MUSIC models give the same results for the observables.With these constraints, the rapidity distributions and transverse momentum spectra are most sensitive to a change of the η/s ratio. We demonstrate that these constraints do not guarantee that each element of the πμν tensor is smaller than the corresponding element T μν id . As an alternative, a strict condition is used. When applied it reduces the sensitivity of the proton and pion momentum distributions to the viscosity parameter. We performed global fits of the rapidity and transverse mass distributions of pion and protons. It was also found that η/s as a function of the collision energy monotonically increases from Elab = 6 AGeV up to Elab = 40 AGeV and saturates for higher SPS energies. We observe that it is difficult to reproduce simultaneously pion and proton rapidity distribution within our model with the present choice of the equation of state without a phase transition. URL Link na plný text Kategória publikačnej činnosti ADC Číslo archívnej kópie 50708 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika 
článok
Názov Scalar quanta in Fermi liquids: zero sounds, instabilities, Bose condensation, and a metastable state in dilute nuclear matter Aut.údaje E. E. Kolomeitsev, D. N. Voskresensky Autor Kolomeitsev Evgeni E. 1970- (99%) UMBFP06 - Katedra fyziky
Spoluautori Voskresensky Dmitri (1%)
Zdroj.dok. The European Physical Journal A : Hadrons and Nuclei. Vol. 52, no. 12 (2016), pp. [1-18]. - Berlin : Springer, 2016 Kľúč.slová heavy ion collisions equation of state relativistic mean-field models hydrodynamics Jazyk dok. angličtina Krajina Spojené štáty Systematika 53 Anotácia The spectrum of bosonic scalar-mode excitations in a normal Fermi liquid with local scalar interaction is investigated for various values and momentum dependence of the scalar Landau parameter f(0) in the particle-hole channel. For f(0) > 0 the conditions are found when the phase velocity on the spectrum of zero sound acquires a minimum at non-zero momentum. For1 < f(0) < 0 there are only damped excitations, and for f(0) <1 the spectrum becomes unstable against the growth of scalar-mode excitations. An effective Lagrangian for the scalar excitation modes is derived after performing a bosonization procedure. We demonstrate that the instability may be tamed by the formation of a static Bose condensate of the scalar modes. The condensation may occur in a homogeneous or inhomogeneous state relying on the momentum dependence of the scalar Landau parameter. We show that in the isospin-symmetric nuclear matter there may appear a metastable state at subsaturation nuclear density owing to the condensate. Then we consider a possibility of the condensation of the zero-sound-like excitations in a state with a nonzero momentum in Fermi liquids moving with overcritical velocities, provided an appropriate momentum dependence of the Landau parameter f(0)( k) > 0. We also argue that in peripheral heavy-ion collisions the Pomeranchuk instability may occur already for f(0) >1. Kategória publikačnej činnosti ADC Číslo archívnej kópie 38091 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika 
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Názov The effect of momentum deposition during fireball evolution on flow anisotropy Aut.údaje Martin Schulc, Boris Tomášik Autor Schulc Martin (30%)
Spoluautori Tomášik Boris 1972- (70%) UMBFP06 - Katedra fyziky
Zdroj.dok. Journal of Physics G: Nuclear and Particle Physics. Vol. 43, no. 12 (2016), art. no. 125106, pp. [1-11]. - Bristol : IOP Publishing, 2016 Kľúč.slová relativistická hydrodynamika anizotropný tok Jazyk dok. angličtina Krajina Veľká Británia Systematika 53 Kategória publikačnej činnosti ADC Číslo archívnej kópie 37633 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika nerozpoznaný
Názov Hydrodynamic modeling of QGP expansion using an exact solution of Riemann problem Aut.údaje Zuzana Fecková, Boris Tomášik Autor Fecková Zuzana 1988- (50%)
Spoluautori Tomášik Boris 1972- (50%) UMBFP06 - Katedra fyziky
Zdroj.dok. Journal of Physics: Conference Series. Vol. 668 (2016), pp. 1-4. - Bristol : IOP Publishing, 2016 ; SQM 2015 medzinárodná konferencia Kľúč.slová relativistická hydrodynamika relativistic hydrodynamics Jazyk dok. angličtina Krajina Veľká Británia Systematika 53 Kategória publikačnej činnosti AFC Číslo archívnej kópie 34380 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika nerozpoznaný
Názov A new hydrodynamic model using an exact Riemann solver Aut.údaje Zuzana Fecková, Boris Tomášik Autor Fecková Zuzana 1988- (50%)
Spoluautori Tomášik Boris 1972- (50%) UMBFP06 - Katedra fyziky
Zdroj.dok. Acta Physica Polonica B : proceedings supplement. Vol. 8, no. 2 (2015), pp. 307-312. - Kraków : Jagellonian University, 2015 Kľúč.slová relativistická hydrodynamika relativistic hydrodynamics Riemannova geometria - Riemannian geometry Jazyk dok. slovenčina Krajina Poľsko Systematika 53 Kategória publikačnej činnosti ADM Číslo archívnej kópie 34316 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika nerozpoznaný
Názov A new shock-capturing numerical scheme for ideal hydrodynamics Aut.údaje Zuzana Fecková, Boris Tomášik Autor Fecková Zuzana 1988- (50%)
Spoluautori Tomášik Boris 1972- (50%) UMBFP06 - Katedra fyziky
Zdroj.dok. Journal of physics : conference series. Vol. 612 (2015), pp. 1-4. - Bristol : IOP Publishing, 2015 ; Hot Quarks 2014 workshop pre mladých vedcov Kľúč.slová relativistická hydrodynamika relativistic hydrodynamics fyzika - physics Jazyk dok. angličtina Krajina Veľká Británia Systematika 53 Kategória publikačnej činnosti AFC Číslo archívnej kópie 34319 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ nerozpoznaný
Názov Stimulation of static deconfined medium by multiple hard partons Aut.údaje Martin Schulc, Boris Tomášik Autor Schulc Martin (50%)
Spoluautori Tomášik Boris 1972- (50%) UMBFP06 - Katedra fyziky
Zdroj.dok. Journal of Physics G: Nuclear and Particle Physics. Vol. 40, no. 12 (2013), pp. [1-11]. - Bristol : IOP Publishing, 2013 Kľúč.slová heavy ion collisions hydrodynamics Jazyk dok. angličtina Krajina Veľká Británia Systematika 53 Kategória publikačnej činnosti ADC Číslo archívnej kópie 27640 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika nerozpoznaný
Názov Spectra, elliptic flow and azimuthally sensitive HBT radii from Buda-Lund model for root s(NN) = 200 GeV Au+Au collisions Aut.údaje Andras Ster ... [et al.] Autor Ster Andras (20%)
Spoluautori Csanád Máté (20%)
Csörgő Tamás (20%)
Lörstad Bengt (20%)
Tomášik Boris 1972- (20%) UMBFP06 - Katedra fyziky
Zdroj.dok. The European Physical Journal A : Hadrons and Nuclei. Vol. 47, no. 4 (2011), p. 58. - Berlin : Springer, 2011 Kľúč.slová femtoscopy heavy ion collisions relativistic hydrodynamics Jazyk dok. angličtina Systematika 539 Kategória publikačnej činnosti ADC Číslo archívnej kópie 19835 Kategória ohlasu MOUNT, E., GRAEF, G., MITROVSKI, M. et al. Correspondence between Hanbury-Brown-Twiss radii and the emission zone in noncentral heavy ion colllisions. In Physical Review C. ISSN 0556-2813, 2011, vol. 84, no. 1-
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Názov Riemann solvers and numerical methods for fluid dynamics Podnázov a practical introdiction Aut.údaje Eleuterio F. Toro Autor Toro Eleuterio F.
Vyd.údaje Berlin : Springer , 2009. - 724 s. : il., 24 cm Vydanie 3rd ed. ISBN 978-3-540-25202-3 Poznámka Bibliografia s. 687-718. Register Kľúč.slová Eulerov vzorec hydrodynamika Euler’s formula rovnice - equations hydrodynamics Jazyk dok. angličtina Krajina Nemecko Systematika 51 551.511.32 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xkni - KNIHY Počet ex. 1, z toho voľných 0, prezenčne 1 
kniha
Signatúra Lokácia Dislokácia Umiestnenie Info 335232 Univerzita Mateja Bela FP Katedra fyziky len prezenčne Názov Freeze-out by bulk viscosity driven instabilities Aut.údaje Giorgio Torrieri, Boris Tomášik, Igor Mishustin Autor Torrieri Giorgio (70%)
Spoluautori Tomášik Boris 1972- (15%) UMBFP06 - Katedra fyziky
Mishustin Igor (15%)
Zdroj.dok. Acta Physica Polonica B. Vol. 39, no. 7 (2008), pp. 1733-1744. - Kraków : Jagellonian University, 2008 Kľúč.slová heavy ion collisions deconfinement phase transition hydrodynamics bulk viscosity freeze-out Jazyk dok. angličtina Krajina Poľsko Systematika 539 Anotácia We describe a new scenario (first introduced in [G.Torrieri, B.Tomasik and I.Mishustin, Phys. Rev. C 77, 034903 (2008)]) for freezeout in heavy ion collisions that could solve the lingering problems associated with the so-called HBT puzzle. We argue that bulk viscosity increases as $T$ approaches $T_c$. The fluid {then} becomes unstable against small perturbations, and fragments into clusters of a size much smaller than the total size of the system. These clusters maintain the pre-existing outward-going flow, as a spray of droplets, but develop no flow of their own, and hadronize by evaporation. We show that this scenario can explain HBT data and suggest how it can be experimentally tested Kategória publikačnej činnosti ADC Číslo archívnej kópie 9792 Kategória ohlasu RAJAGOPAL, Krishna - TRIPURANENI, Nilesh. Bulk viscosity and cavitation in boost-invariant hydrodynamic expansion. In Journal of high energy physics. ISSN 1029-8479, 2010, no. 3, article no. 94025.
MATEOS, David - TRANCANELLI, Diego. Anisotropic N=4 Super-Yang-Mills Plasma and Its Instabilities. In Physical review letters. ISSN 0031-9007, 2011, vol. 107, no. 10, article no. 101601.
MATEOS, David - TRANCANELLI, Diego. Thermodynamics and instabilities of a strongly coupled anisotropic plasma. In Journal of high energy physics. ISSN 1029-8479, 2011, no. 7, article no. 054.
CHANDRA, Vinod. Bulk viscosity of anisotropically expanding hot QCD plasma. In Physical review D. ISSN 1550-7998, 2011, vol. 84, no. 9, article no. 018.
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