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SUMMARY:Forward-backward correlations between intensive observables
DTSTART;VALUE=DATE-TIME:20161013T121500Z
DTEND;VALUE=DATE-TIME:20161013T124500Z
DTSTAMP;VALUE=DATE-TIME:20260714T032249Z
UID:indico-contribution-775@cern.ch
DESCRIPTION:Speakers: Vladimir Kovalenko (Saint Petersburg State Universit
 y)\nWe demonstrate that the investigations of the forward-backward correla
 tions between intensive observables enable to obtain more clear signal abo
 ut the initial stage of hadronic interaction\, e.g. about the process of s
 tring fusion\, compared to usual forward-backward multiplicity correlation
 s. As an example the correlation between mean-event transverse momenta of 
 charged particles in separated rapidity intervals is considered. We show t
 hat this type of correlation is robust against the volume fluctuations and
  the details of the centrality determination.\n\nThe calculations are fulf
 illed both in the simple model with string fusion by introducing a lattice
  in transverse plane and in the framework of dipole-based Monte Carlo stri
 ng fusion model. The dependence of the correlation strength on the collisi
 on centrality is obtained for different initial energies. It is shown that
  at LHC energy the dependence reveals the decline of the correlation coeff
 icient for most central collisions and Pb-Pb\, reflecting the attenuation 
 of color field fluctuations due to the string fusion at large string densi
 ty. This non-monotonic behavior with centrality is achieved only in heavy 
 ion collisions at LHC\, while in Au-Au collisions at RHIC and p-Pb at LHC 
 the string density is not enough to provide a decline of the correlation c
 oefficient for most central collisions. We compare the results both with t
 he ones obtained in alternative models and with the ones obtained by us us
 ing various MC generators.\n\nWe conclude that this type of correlation is
  promising for the observation of the signatures of string fusion and for 
 detailed study of  the initial stage of hadronic interaction in relativist
 ic heavy ion collisions at LHC energy.\n\nThe work was supported by the RF
 BR grant 15-02-02097-a and the Saint-Petersburg State University grant 11.
 38.197.2014.\n\nhttps://indico.particle.mephi.ru/event/4/contributions/775
 /
LOCATION:Milan Hotel Hall of the 2nd floor
URL:https://indico.particle.mephi.ru/event/4/contributions/775/
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