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Title Particle number fluctuations in a non-ideal pion gas Author info Evgeni E. Kolomeitsev, Maxim E. Borisov, Dmitry N. Voskresensky Author Kolomeitsev Evgeni E. 1970- (98%) UMBFP06 - Katedra fyziky
Co-authors Borisov Maxim E. (1%)
Voskresensky Dmitri (1%)
Source document 6th international conference on new frontiers in physics (ICNFP 2017). Pp. [1-7]. - Les Ulis : Édition Diffusion Presse Sciences, 2018 ; International conference on new frontiers in physics (ICNFP 2017) medzinárodná konferencia Note Príspevok je evidovaný v databáze Scopus. Keywords particle number fluctuations pion gas particle physics Language English Country France systematics 53 Annotation We consider a non-ideal hot pion gas with the dynamically fixed number of particles in the model with the lambda-phi^4 interaction. The effective Lagrangian for the description of such a system is obtained by dropping the terms responsible for the change of the total particle number. Within the self-consistent Hartree approximation, we compute the effective pion mass, thermodynamic characteristics of the system and identify a critical point of the induced Bose-Einstein condensation when the pion chemical potential reaches the value of the effective pion mass. The normalized variance, skewness, and kurtosis of the particle number distributions are calculated. We demonstrate that all these characteristics remain finite at the critical point of the Bose-Einstein condensation. This is due to the non-perturbative account of the interaction and is in contrast to the ideal-gas case URL Link na zdrojový dokument Public work category AFC No. of Archival Copy 43933 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ 
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Title Hot and dense pion gas with finite chemical potential Author info E. E. Kolomeitsev, D. N. Voskresensky, B. Kämpfer Author Kolomeitsev Evgeni E. 1970- (34%)
Co-authors Voskresensky Dmitri (33%)
Kämpfer B. (33%)
Source document Acta Physica Polonica B. Vol. 27, no. 11 (1996), pp. 3263-3270. - Kraków : Jagellonian University, 1996 ; MESON' 96 : Workshop on Production, Properties and Interactions of Mesons Workshop Keywords pion gas Bose-Einsteinova kondenzácia - Bose-Einstein condensation heavy ion collisions Form. Descr. články - journal articles Language English Country Poland Annotation A dense and hot pion system with a dynamically fixed particle number and an arbitrary charge is investigated with respect to ultra-relativistic heavy-ion collisions. The Lagrangian for describing such a system is derived from Weinberg's chiral Lagrangian for the pion-pion interaction. Pion polarization operators are calculated within the Hartree approximation. The pion spectrum in the isospin symmetrical gas is presented. The effective inmedium pion gap depends sensitively on the density and the temperature, and it is found to exceed both the free pion mass and the corresponding value for the pion gas in chemical equilibrium. The possibility of a BoseEinstein condensation is also discussed URL Link na plný text Link do databázy WoS Public work category AFC No. of Archival Copy 21535 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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