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Measurement of event-by-event transverse momentum and multiplicity fluctuations using strongly intensive measures $Delta[P_T, N]$ and $Sigma[P_T, N]$ in nucleus-nucleus collisions at the CERN Super Proton Synchrotron | | NA49 Collaboration
; T. Anticic
; B. Baatar
; J. Bartke
; H. Beck
; L. Betev
; H. Bialkowska
; C. Blume
; B. Boimska
; J. Book
; M. Botje
; P. Buncic
; P. Christakoglou
; P. Chung
; O. Chvala
; J. Cramer
; V. Eckardt
; Z. Fodor
; P. Foka
; V. Friese
; M. Gazdzicki
; K. Grebieszkow
; C.Hohne
; K. Kadija
; A. Karev
; V. Kolesnikov
; M. Kowalski
; D. Kresan
; A. Laszlo
; R. Lacey
; M. van Leeuwen
; M. Mackowiak-Pawlowska
; M. Makariev
; A. Malakhov
; G. Melkumov
; M. Mitrovski
; S. Mrowczynski
; G. Palla
; A. Panagiotou
; J. Pluta
; D. Prindle
; F. Puhlhofer
; R. Renfordt
; C. Roland
; G. Roland
; M. Rybczynski
; A. Rybicki
; A. Sandoval
; A. Rustamov
; N. Schmitz
; T. Schuster
; P. Seyboth
; F. Sikler
; E. Skrzypczak
; M. Slodkowski
; G. Stefanek
; R. Stock
; H. Strobele
; T. Susa
; M. Szuba
; D. Varga
; M. Vassiliou
; G. Veres
; G. Vesztergombi
; D. Vranic
; Z. Wlodarczyk
; A. Wojtaszek-Szwarc
; | | Date: |
15 Sep 2015 | | Abstract: | Results from the NA49 experiment at the CERN SPS are presented on
event-by-event transverse momentum and multiplicity fluctuations of charged
particles, produced at forward rapidities in central Pb+Pb interactions at beam
momenta 20$A$, 30$A$, 40$A$, 80$A$, and 158$A$ GeV/c, as well as in systems of
different size ($p+p$, C+C, Si+Si, and Pb+Pb) at 158$A$ GeV/c. This publication
extends the previous NA49 measurements of the strongly intensive measure
$Phi_{p_T}$ by a study of the recently proposed strongly intensive measures of
fluctuations $Delta[P_T, N]$ and $Sigma[P_T, N]$. In the explored kinematic
region transverse momentum and multiplicity fluctuations show no significant
energy dependence in the SPS energy range. However, a remarkable system size
dependence is observed for both $Delta[P_T, N]$ and $Sigma[P_T, N]$, with the
largest values measured in peripheral Pb+Pb interactions. The results are
compared with NA61/SHINE measurements in $p+p$ collisions, as well as with
predictions of the UrQMD and EPOS models. | | Source: | arXiv, 1509.4633 | | Services: | Forum | Review | PDF | Favorites | |
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