Počet záznamov: 1
Reconstructing the freeze-out state in Pb+Pb collisions at 158 AGeV/c
SYS 0249158 LBL ---naa--22--------450- 005 20240509135730.7 014 $a 000181859200012 $2 CCC 014 $a 000181859200012 $2 WOS CC. SCIE 017 70
$a 10.1556/APH.17.2003.1.11 $2 DOI 100 $a 20170817 2003 101 0-
$a eng 102 $a HU 200 1-
$a Reconstructing the freeze-out state in Pb+Pb collisions at 158 AGeV/c $f Boris Tomášik, Urs Achim Wiedemann, Ulrich Heinz 330 $a For a class of analytical parametrizations of the freeze-out state of relativistic heavy ion collisions, we perform a simultaneous analysis of the single-particle m(perpendicular to)-spectra and two-particle Bose-Einstein correlations measured in central Pb+Pb collisions at the CERN SPS. The analysis includes a full model parameter scan with chi(2) confidence levels. A comparison of different transverse density profiles for the particle emission region allows for a quantitative discussion of possible model dependencies of the results. Our fit results suggest a low thermal freeze-out temperature T approximate to 95 +/- 15 MeV and a large average transverse flow velocity (υ) over bar (perpendicular to) approximate to 0.55 +/- 0.07. Moreover, the fit favours a box-shaped transverse density profile over a Gaussian one. We discuss the origins and the consequences of these results in detail. In order to reproduce the measured pion multiplicity our model requires a positive pion chemical potential. A study of the pion phase-space density indicates mu(pi) approximate to 60MeV for T = 100MeV. 463 -1
$1 200 1 $a Acta physica Hungarica $e heavy ion physics $v Vol. 17, no. 1 (2003), pp. 105-143 $1 011 $a 1219-7580 $1 210 $a Budapest $c Akademiai Kiado $d 2003 606 0-
$3 umb_un_auth*0119138 $a heavy ion collisions 606 0-
$3 umb_un_auth*0126370 $a nukleárne kolízie 615 $n 53 $a Fyzika 675 $a 53 700 -1
$3 umb_un_auth*0120276 $a Tomášik $b Boris $9 34 $f 1972- $4 070 701 -1
$3 umb_un_auth*0261652 $a Wiedemann $b Urs Achim $9 33 $4 070 701 -1
$3 umb_un_auth*0261651 $a Heinz $b Ulrich $9 33 $4 070 801 -0
$a SK $b BB301 $g AACR2 $9 unimarc sk 856 9-
$u http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord&UT=WOS:000181859200012 T85 $x existuji fulltexy
Počet záznamov: 1