scholarly journals Self-similarity of negative particle production from the Beam Energy Scan Program at STAR

2015 ◽  
Vol 39 ◽  
pp. 1560103 ◽  
Author(s):  
Mikhail Tokarev

We present the spectra of negative charged particle production in Au [Formula: see text] Au collisions from STAR for the first phase of the RHIC Beam Energy Scan Program measured over a wide range of collision energy [Formula: see text], and transverse momentum of produced particle in different centralities at [Formula: see text]. The spectra demonstrate strong dependence on collision energy which enhances with [Formula: see text]. An indication of self-similarity of negative charged particle production in Au [Formula: see text] Au collisions is found. The constituent energy loss as a function of energy and centrality of collisions and transverse momentum of inclusive particle was estimated in the [Formula: see text]-scaling approach. The energy dependence of the model parameters - the fractal and fragmentation dimensions and “specific heat”, was studied.

2019 ◽  
Vol 204 ◽  
pp. 06001
Author(s):  
Mikhail Tokarev ◽  
Armen Kechechyan ◽  
Imrich Zborovsky

Negative particle yields in Au + Au collisions obtained by the STAR Collaboration from BES-I at RHIC are analyzed in the framework of the z-scaling approach. The spectra were measured over a wide range of collision energy $\sqrt {{s_{NN}}} = 7.7 - 200\,{\rm{GeV}}$ and transverse momentum of produced particles for different centralities at $\left| \eta \right| \lt 0.5$. The scaling behavior of the spectra as a function of the collision energy and centrality in z-presentation is verified. The constituent energy loss in dependence on the energy and centrality of collision and transverse momentum of inclusive particle is estimated. New indication on self-similarity of fractal structure of nuclei and fragmentation process is found. A discontinuity of the model parameters - fractal and fragmentation dimensions and specific heat - is considered from the point of view of a phase transition in nuclear matter.


1984 ◽  
Vol 246 (3) ◽  
pp. 408-430 ◽  
Author(s):  
T. Åkesson ◽  
M.G. Albrow ◽  
S. Almehed ◽  
O. Benary ◽  
H. Bøggild ◽  
...  

1972 ◽  
Vol 42 (4) ◽  
pp. 493-496 ◽  
Author(s):  
A. Bertin ◽  
P. Capiluppi ◽  
M. D'Agostini-Bruno ◽  
R.J. Ellis ◽  
G. Giacomelli ◽  
...  

2011 ◽  
Vol 696 (1-2) ◽  
pp. 30-39 ◽  
Author(s):  
K. Aamodt ◽  
A. Abrahantes Quintana ◽  
D. Adamová ◽  
A.M. Adare ◽  
M.M. Aggarwal ◽  
...  

1972 ◽  
Vol 41 (2) ◽  
pp. 201-204 ◽  
Author(s):  
A. Bertin ◽  
P. Capiluppi ◽  
M. D'Agostino-Bruno ◽  
R.J. Ellis ◽  
G. Giacomelli ◽  
...  

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