scholarly journals K−/K+ratio in heavy-ion collisions with an antikaon self-energy in hot and dense matter

2003 ◽  
Vol 68 (2) ◽  
Author(s):  
Laura Tolós ◽  
Artur Polls ◽  
Angels Ramos ◽  
Jürgen Schaffner-Bielich
Keyword(s):  
Heavy Ion Collisions ◽  
Dense Matter ◽  
Heavy Ion ◽  
Self Energy ◽  
Ion Collisions

scholarly journals Kaon production from hot and dense matter formed in heavy-ion collisions

1991 ◽  
Vol 43 (4) ◽  
pp. 1881-1892 ◽  
Author(s):  
G. E. Brown ◽  
C. M. Ko ◽  
Z. G. Wu ◽  
L. H. Xia
Keyword(s):  
Heavy Ion Collisions ◽  
Dense Matter ◽  
Heavy Ion ◽  
Kaon Production ◽  
Ion Collisions

scholarly journals Apparent and Actual Shifts in Mass and Width of ϕ Mesons Produced in Heavy-Ion Collisions

1997 ◽  
Vol 12 (02) ◽  
pp. 127-134 ◽  
Author(s):  
R. S. Bhalerao ◽  
S. K. Gupta
Keyword(s):  
Invariant Mass ◽  
Preliminary Data ◽  
Heavy Ion Collisions ◽  
Mass Spectra ◽  
Dense Matter ◽  
Heavy Ion ◽  
High Energy ◽  
Mass Shift ◽  
Ion Collisions ◽  
Invariant Mass Spectra

We present a method of analyzing invariant-mass spectra of kaon pairs resulting from decay of ϕ mesons produced in high-energy heavy-ion collisions. It can be used to extract the shifts in the mass and the width (ΔM and ΔΓ) of the ϕ mesons when they are inside the dense matter formed in these collisions. We illustrate our method with the help of available preliminary data. Extracted values of ΔM and ΔΓ are significantly larger than those obtained with an earlier method. Our results are consistent with the experimentally observed pT dependence of the mass shift. Finally, we present a phenomenological relation between ΔM and ΔΓ. It provides a useful constraint on theories which predict the values of these two quantities.

scholarly journals Electromagnetic probes of dense matter in heavy-ion collisions

1998 ◽  
Vol 630 (1-2) ◽  
pp. 563-570 ◽  
Author(s):  
G.Q. Li ◽  
G.E. Brown ◽  
C.M. Ko
Keyword(s):  
Heavy Ion Collisions ◽  
Dense Matter ◽  
Heavy Ion ◽  
Ion Collisions ◽  
Electromagnetic Probes

scholarly journals A Description of Pseudorapidity Distributions of Charged Particles Produced in Au+Au Collisions at RHIC Energies

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Z. J. Jiang ◽  
Dongfang Xu ◽  
Yan Huang
Keyword(s):  
Phase Transition ◽  
Heavy Ion Collisions ◽  
Charged Particles ◽  
Dense Matter ◽  
Heavy Ion ◽  
High Energy ◽  
Low Energy ◽  
Ion Collisions ◽  
Rapidity Distributions ◽  
Pseudorapidity Distributions

In heavy ion collisions, charged particles come from two parts: the hot and dense matter and the leading particles. In this paper, the hot and dense matter is assumed to expand according to the hydrodynamic model including phase transition and decouples into particles via the prescription of Cooper-Frye. The leading particles are as usual supposed to have Gaussian rapidity distributions with the number equaling that of participants. The investigations of this paper show that, unlike low energy situations, the leading particles are essential in describing the pseudorapidity distributions of charged particles produced in high energy heavy ion collisions. This might be due to the different transparencies of nuclei at different energies.

LIGHT CLUSTERS IN NUCLEAR MATTER

2010 ◽  
Vol 24 (25n26) ◽  
pp. 4993-5009
Author(s):  
GERD RÖPKE
Keyword(s):  
Surrounding Medium ◽  
Mean Field ◽  
Dense Matter ◽  
Heavy Ion ◽  
Field Approximation ◽  
Mean Field Approximation ◽  
Pauli Blocking ◽  
Self Energy ◽  
Ion Collisions ◽  
Protons And Neutrons

Nuclei in dense matter are influenced by the medium. In the cluster mean-field approximation, an effective Schrodinger equation for the A-nucleon cluster is obtained accounting for the effects of the surrounding medium, such as self-energy and Pauli blocking. Similar to the single-baryon states (free protons and neutrons), the light elements (A ≤ 4) are treated as quasiparticles. Fit formulae are given for the quasiparticle shifts as function of temperature, density, asymmetry, and momentum. Composition, quantum condensates and thermodynamic functions are considered. The relevance for nuclear structure, heavy ion collisions and supernova astrophysics is shown.

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