Jun 12 – 16, 2017
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Europe/Zurich timezone

Multiplicity and forward energy fluctuations in Ar+Sc and Be+Be collisions at the CERN SPS from NA61/SHINE.

Jun 13, 2017, 2:20 PM
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Nikhef Science Park 105 1098XG Amsterdam The Netherlands


Andrey Seryakov (St Petersburg State University (RU))


Preliminary results for multiplicity and forward energy fluctuations are
presented for Be+Be and Ar+Sc collisions at 13A, 19A,
30A, 40A, 75A and 150A GeV/c beam momentum. The data were obtained by the
NA61/SHINE detector at the CERN SPS. Centrality selection and
forward energy measurement are based on the nucleon spectator energy
in the forward hemisphere determined by the Projectile spectator
detector. The scaled variance ω of the multiplicity distribution and the
strongly intensive measure Ω of multiplicity fluctuations were calculated
for all, negatively and positively charged hadrons. The presented Ω quantity
shows, in particular, complete elimination of volume fluctuations for
the most central Ar+Sc collisions. A comparison with p+p results from
NA61/SHINE, Pb+Pb data of NA49 and EPOS 1.99 simulations is shown.

List of tracks Charge fluctuations, correlations and balance functions

Primary author

Andrey Seryakov (St Petersburg State University (RU))

Presentation materials