scholarly journals Nuclear stopping and flow in heavy-ion collisions and the in-medium NN cross section

2005 ◽  
Vol 609 (3-4) ◽  
pp. 241-246 ◽  
Author(s):  
T. Gaitanos ◽  
C. Fuchs ◽  
H.H. Wolter
Keyword(s):  
Cross Section ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Nuclear Stopping ◽  
Ion Collisions

AVERAGE PROPERTY OF FRAGMENTATION REACTION AND MOMENTUM DISSIPATION INDUCED BY HALO-NUCLEI IN HEAVY ION COLLISIONS

2006 ◽  
Vol 15 (05) ◽  
pp. 1069-1086
Author(s):  
JIAN-YE LIU ◽  
WEN-JUN GUO ◽  
ZHONG-ZHOU REN ◽  
WEI ZUO ◽  
XI-GUO LEE ◽  
...  
Keyword(s):  
Density Distribution ◽  
Heavy Ion Collisions ◽  
Halo Nucleus ◽  
Heavy Ion ◽  
Halo Nuclei ◽  
Fragmentation Reaction ◽  
Quantum Molecular Dynamics ◽  
Nuclear Stopping ◽  
Density Distributions ◽  
Ion Collisions

We study systematically the average property of fragmentation reaction and momentum dissipation induced by halo-nuclei in intermediate energy heavy ion collisions for different colliding systems and different beam energies within the isospin dependent quantum molecular dynamics model (IQMD). This study is based on the extended halo-nucleus density distributions, which indicates the average property of loosely inner halo nucleus structure, because the interaction potential and in-medium nucleon-nucleon cross section in IQMD model depend on the density distribution. In order to study the average properties of fragmentation reaction and momentum dissipation induced by halo-nuclei we also compare the results for the halo-nuclear colliding systems with those for corresponding stable colliding systems with same mass under the same incident channel condition. We find that the effect of extended halo density distribution on the fragment multiplicity and nuclear stopping (momentum dissipation) are important for the different beam energies and different colliding systems. For example the extended halo density distributions increase the fragment multiplicity but decrease the nuclear stopping for all of incident channel conditions in this paper.

IMPORTANCE OF DEFORMATION AND ORIENTATION OF NUCLEAR SHAPES FOR THE SYNTHESIS OF SUPER-HEAVY ELEMENTS

2004 ◽  
Vol 13 (01) ◽  
pp. 361-366 ◽  
Author(s):  
M. KOWAL ◽  
Z. ŁOJEWSKI
Keyword(s):  
Potential Energy ◽  
Cross Section ◽  
Heavy Ion Collisions ◽  
Fusion Cross Section ◽  
Heavy Ion ◽  
Heavy Elements ◽  
Axially Symmetric ◽  
Deformation Degree ◽  
Fusion Barrier ◽  
Ion Collisions

We are studying the potential energy describing the entrance channel of a heavy-ion collisions for the axially symmetric deformed and arbitrarily oriented nuclear shapes. The paper presents an analysis of the influence of different orientations of the deformed ions on the height and shape of the fusion barrier. The net effect of the deformation degree of freedom on the transmission at sub-barrier energies is to enhance the fusion cross section. This problem is very important especially in the perspective of the synthesis of super-heavy elements.

scholarly journals Measurement of Open Heavy-Flavour Production in pp and p–Pb Collisions with ALICE at the LHC

2018 ◽  
Vol 46 ◽  
pp. 1860019
Author(s):  
Renu Bala
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Heavy Ion Collisions ◽  
D Mesons ◽  
Production Cross ◽  
Hadron Collider ◽  
Heavy Ion ◽  
Nuclear Modification Factor ◽  
Ion Collisions ◽  
Modification Factor

The Large Hadron Collider at CERN allows us to study heavy-ion collisions at an un- precedented energy. ALICE, A Large Ion Collider Experiment, is the experiment ded- icated to the investigation of heavy-ion collisions. In this contribution, recent open heavy-flavour results from pp collisions at [Formula: see text]= 5.02, 7, 8 and 13 TeV and p–Pb collisions at [Formula: see text] = 5.02 TeV, collected with the ALICE detector during the LHC Run-1 and Run-2 are presented. The results include the production cross section, nuclear modification factor and multiplicity dependence studies of production of D mesons and electrons from heavy-flavour hadron decays at mid-rapidity and of muons from heavy-flavour hadron decays at forward rapidity. Charm production was measured down to [Formula: see text] = 0 GeV/[Formula: see text] in pp and p–Pb collisions. Recent measurements of the production cross section of heavy charmed baryons such as [Formula: see text] (in pp and p–Pb) and [Formula: see text] (in pp) are discussed. The results are compared with theoretical model predictions.

scholarly journals Production of exotic charmonium in heavy ion collisions

2020 ◽  
Vol 235 ◽  
pp. 02005
Author(s):  
F. S. Navarra
Keyword(s):  
Gas Phase ◽  
Cross Section ◽  
Heavy Ion Collisions ◽  
Production Cross ◽  
Short Review ◽  
Heavy Ion ◽  
Charmonium Production ◽  
Ion Collisions ◽  
Hadron Gas ◽  
Multiquark States

We present a short review of exotic charmonium production in heavy ion collisions. We discuss predictions for the production cross section of several of these states in ultra-peripheral Pb-Pb collisions at the LHC. The experimental study of these processes is feasible and can be used to yield valuable information about the structure of multiquark states. We also address X(3872) production in central Pb-Pb collisions. In particular, we discuss the suppression of X(3872) during the hadron gas phase. Finally, we comment on the very recent CMS data on the X(3872) yield in Pb-Pb collisions. the very recent CMS data on the X(3872) yield in Pb-Pb collisions.

Nuclear stopping in heavy-ion collisions at 100 MeV/nucleon from inclusive and exclusive neutral pion measurements

1996 ◽  
Vol 53 (4) ◽  
pp. 1782-1791 ◽  
Author(s):  
A. Badalà ◽  
R. Barbera ◽  
A. Palmeri ◽  
G. S. Pappalardo ◽  
F. Riggi ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Neutral Pion ◽  
Heavy Ion ◽  
Nuclear Stopping ◽  
Ion Collisions

PION PRODUCTION DIFFERENTIAL CROSS SECTION OF HEAVY ION COLLISIONS AT SUBTHRESHOLD ENERGIES

1993 ◽  
Vol 08 (26) ◽  
pp. 4667-4678
Author(s):  
K.M. ABUMURAD
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Heavy Ion Collisions ◽  
Pion Production ◽  
Giant Resonance ◽  
Heavy Ion ◽  
Ion Collisions ◽  
Invariant Differential ◽  
Theoretical Results

The Lorentz-invariant differential cross section (LIDCS) for π production in heavy ion collisions was studied through the two-step process, NN→NΔ→NNπ. A phenomenological interaction potential containing central and tensor terms was used. The effect of inclusion of the tensor term on the LIDCS was little. The target nucleus 12C was excited to one of its giant resonance states, Jπ=1+, T=1, while the projectile nucleus 16O was excited to an isobar Δ (M=1232 MeV , ΓΔ=115.11 MeV ) which decayed (NΔ→NNπ), giving a nucleon and a pion mπ=138 MeV . In comparison with available experimental data, the shape was reproduced, but the theoretical results were higher.

POSSIBILITY OF A LIGHT, SPIN-ONE BOSON PRODUCED ELECTROMAGNETICALLY IN HEAVY-ION COLLISIONS

1986 ◽  
Vol 01 (12) ◽  
pp. 653-656 ◽  
Author(s):  
SAUL BARSHAY
Keyword(s):  
Cross Section ◽  
Decay Mode ◽  
Heavy Ion Collisions ◽  
Neutral Particle ◽  
Heavy Ion ◽  
Large Cross Section ◽  
Spin Parity ◽  
Ion Collisions

We suggest that if the correlated positron-electron peaks seen in superheavy-ion collisions arise from the decay of a new neutral particle with a mass of about 1.7 MeV, its spin-parity is 1−. We show that it then can be produced by the interaction of three photons, with a large cross section and with an amplitude for being at rest in the c.m. system which is not dynamically suppressed. We obtain a lifetime of 10−13−10−14 s. The new particle must also have a measurable decay mode into three photons.

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