Fluctuations in charged particle multiplicities in relativistic heavy-ion collisions (English)

Paper

In: Journal of Physics G: Nuclear and Particle Physics   ;  43 ,  8  ;  085102  ;  2016
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Multiplicity distributions of charged particles and their event-by-event fluctuations have been compiled for relativistic heavy-ion collisions from the available experimental data at Brookhaven National Laboratory and CERN and also by the use of an event generator. Multiplicity fluctuations are sensitive to QCD phase transition and to the presence of a critical point in the QCD phase diagram. In addition, multiplicity fluctuations provide baselines for other event-by-event measurements. Multiplicity fluctuation expressed in terms of the scaled variance of the multiplicity distribution is an intensive quantity, but is sensitive to the volume fluctuation of the system. The importance of the choice of narrow centrality bins and the corrections of the centrality bin-width effect for controlling volume fluctuations have been discussed. It is observed that the mean and width of the multiplicity distributions monotonically increase as functions of increasing centrality at all collision energies, whereas the multiplicity fluctuations show minimal variations with centrality. The beam-energy dependence shows that the multiplicity fluctuations have a slow rise at lower collision energies and remain constant at higher energies.

Table of contents – Volume 43, Issue 8

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084001
Letter of intent for KM3NeT 2.0
S Adrián-Martínez / M Ageron / F Aharonian / S Aiello / A Albert / F Ameli / E Anassontzis / M Andre / G Androulakis / M Anghinolfi et al. | 2016
084002
Shape coexistence at low spin in the Z = 50 region and its spectroscopic signatures
P E Garrett | 2016
085001
Tagging b quarks at extreme energies without tracks
B Todd Huffman / Charles Jackson / Jeff Tseng | 2016
085002
Optical dispersion of composite particles consisting of millicharged constituents
Audrey K Kvam / David C Latimer | 2016
085101
Spin–orbit coupling rule in bound fermion systems
J-P Ebran / E Khan / A Mutschler / D Vretenar | 2016
085102
Fluctuations in charged particle multiplicities in relativistic heavy-ion collisions
Maitreyee Mukherjee / Sumit Basu / Subikash Choudhury / Tapan K Nayak | 2016
085103
Continuum discretised BCS approach for weakly bound nuclei
J A Lay / C E Alonso / L Fortunato / A Vitturi | 2016
085104
Electromagnetic selection rules in the triangular α-cluster model of 12C
G Stellin / L Fortunato / A Vitturi | 2016
085201
Double electron capture searches in 74Se
B Lehnert / T Wester / D Degering / D Sommer / L Wagner / K Zuber | 2016