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Fluctuations in non-ideal pion gas with dynamically fixed particle number
SYS 0265935 LBL 02044^^^^^2200253^^^450 005 20240513090837.9 014 $a 000436216000006 $2 CCC 014 $a 000436216000006 $2 WOS CC. SCIE 014 $a 2-s2.0-85042882888 $2 SCOPUS 017 70
$a 10.1016/j.nuclphysa.2018.02.010 $2 DOI 035 $a biblio/93639 $2 CREPC2 100 $a 20181212d2018 m y slo 03 ba 101 0-
$a eng 102 $a NL 200 1-
$a Fluctuations in non-ideal pion gas with dynamically fixed particle number $f E. E. Kolomeitsev, D. N. Voskresensky 330 0-
$a We consider a non-ideal hot pion gas with the dynamically fixed number of particles in the model with the λφ4interaction. The effective Lagrangian for the description of such a system is obtained after dropping the terms responsible for the change of the total particle number. Reactions π+π−↔π0π0, which deter-mine the isospin balance of the medium, are permitted. Within the self-consistent Hartree approximation we compute the effective pion mass, thermodynamic characteristics of the system and the variance of the particle number at temperatures above the critical point of the induced Bose–Einstein condensation when the pion chemical potential reaches the value of the effective pion mass. We analyze conditions for the con-densate formation in the process of thermalization of an initially non-equilibrium pion gas. The normalized variance of the particle number increases with a temperature decrease but remains finite in 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. In the kinetic regime of the condensate formation the variance is shown to stay finite also 463 -1
$1 001 umb_un_cat*0289346 $1 200 1 $a Nuclear Physics A $v Vol. 973, (2018), pp. 89-103 $1 210 $a Amsterdam $c Elsevier B.V. $d 2018 $1 011 $a 0375-9474 $1 011 $a 1873-1554 606 0-
$3 umb_un_auth*0119138 $a heavy ion collisions 606 0-
$3 umb_un_auth*0110816 $a fluctuations 606 0-
$3 umb_un_auth*0272878 $a Hartree approximation 606 0-
$3 umb_un_auth*0284970 $a Bose-Einsteinova kondenzácia $X Bose-Einstein condensation 615 $n 53 $a Fyzika 675 $a 53 700 -1
$3 umb_un_auth*0131258 $a Kolomeitsev $b Evgeni E. $f 1970- $9 50 $4 070 $p UMBFP06 $T Katedra fyziky 701 -1
$3 umb_un_auth*0160605 $a Voskresensky $b Dmitri $4 070 $9 50 801 $a SK $b BB301 $g AACR2 $9 unimarc sk 856 $u https://www.sciencedirect.com/science/article/pii/S0375947418300447 $a Link na plný text T85 $x existuji fulltexy
Number of the records: 1