scholarly journals Measurement of the ratio of the sixth order to the second order cumulant of net-proton multiplicity distributions in relativistic heavy-ion collisions

2017 ◽  
Vol 957 ◽  
pp. 60-70 ◽  
Author(s):  
Lizhu Chen ◽  
Zhiming Li ◽  
Fenping Cui ◽  
Yuanfang Wu
Keyword(s):  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Second Order ◽  
Sixth Order ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Multiplicity Distributions

CHARGED MULTIPLICITY DISTRIBUTION IN RELATIVISTIC HEAVY-ION COLLISIONS

2009 ◽  
Vol 18 (09) ◽  
pp. 1929-1944 ◽  
Author(s):  
SHAFIQ AHMAD ◽  
M. AYAZ AHMAD ◽  
M. TARIQ ◽  
M. ZAFAR
Keyword(s):  
Heavy Ion Collisions ◽  
Nuclear Emulsion ◽  
Multiplicity Distribution ◽  
Heavy Ion ◽  
Universal Function ◽  
Relativistic Heavy Ion Collisions ◽  
Medium Energy ◽  
Charged Multiplicity ◽  
Ion Collisions ◽  
Multiplicity Distributions

The experimental results of multiplicity distributions of grey and relativistic shower particles emitted in the interactions of 28 Si and 12 C ions at 4.5 A GeV /c with nuclear emulsion are reported. The study of the multiplicity distributions of relativistic shower particles and medium energy target-associated protons produced in heavy-ion collisions seems to observe the semi-inclusive KNO scaling. A simplified universal function has been used to represent the experimental data.

LEPTON PAIR PRODUCTION BY LOW ENERGY BREMSSTRAHLUNG IN RELATIVISTIC HEAVY-ION COLLISIONS IN SECOND ORDER PERTURBATION THEORY

1995 ◽  
Vol 04 (03) ◽  
pp. 587-606
Author(s):  
JÖRG WEINBRENNER ◽  
WERNER SCHEID ◽  
SREE RAM VALLURI
Keyword(s):  
Perturbation Theory ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Second Order ◽  
Relativistic Heavy Ion Collisions ◽  
Order Perturbation ◽  
Order Perturbation Theory ◽  
Total Probability ◽  
Ion Collisions ◽  
Second Order Perturbation Theory

Dileptons can be produced through the mechanism of virtual bremsstrahlung during the deceleration of nuclei in relativistic heavy-ion collisions. The dilepton spectrum is studied in the framework of second order perturbation theory. Coherence effects are found to enhance the contributions to pair emission through constructive interference, since the main deceleration of nuclear matter in these collisions takes place in a small space-time region. Differential and total probabilities for lepton pairs are calculated for central 238U + 238U collisions at energies of 15 GeV/N and 60 GeV/N. Whereas the antisymmetrization of the lepton states plays a non-negligible role for the differential probabilities, it is not significant for the total probability.

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