THE INTERACTION OF ρ AND K+ MESONS WITH MATTER

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1609-1618
Author(s):  
J. AICHELIN ◽  
C. HARTNACK ◽  
Y. LEIFELS ◽  
H. OESCHLER ◽  
S. VOGEL
Keyword(s):  
Cross Section ◽  
Charge Exchange ◽  
Production Cross Section ◽  
Production Cross ◽  
Heavy Ion ◽  
Potential Interaction ◽  
Heavy Ion Experiments ◽  
Vector Mesons ◽  
Kaon Production ◽  
K Mesons

We review in this contribution the information we can obtain from heavy-ion experiments about the interaction of mesons with matter. We demonstrate that the vector mesons seen in experiments come predominantly from low densities. Kaons offer a better opportunity but most of the presently available experimental observables do not allow to analyze separately the three essential unknown quantities: the kaon production cross-section in the medium, the K+N potential interaction at finite densities and temperatures and the kaon (elastic or charge exchange) rescattering cross-section in the medium. We propose a measurement which almost exclusively tests the K+N potential.

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 cross section of neutron-rich calcium isotopes in heavy ion collisions

2015 ◽  
Vol 39 (4) ◽  
pp. 044103 ◽  
Author(s):  
Dong-Hong Zhang ◽  
Wen-Jie Xie ◽  
Jun Su ◽  
Feng-Shou Zhang
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Heavy Ion Collisions ◽  
Production Cross ◽  
Heavy Ion ◽  
Calcium Isotopes ◽  
Ion Collisions

scholarly journals LONG-RANGE RAPIDITY CORRELATIONS IN HEAVY-LIGHT ION COLLISIONS

2014 ◽  
Vol 25 ◽  
pp. 1460023 ◽  
Author(s):  
YURI V. KOVCHEGOV ◽  
DOUGLAS E. WERTEPNY
Keyword(s):  
Long Range ◽  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Azimuthal Angle ◽  
Heavy Ion ◽  
The Other ◽  
Color Glass ◽  
Ion Collisions ◽  
Gluon Production

We study two-particle long-range rapidity correlations arising in the early stages of heavy ion collisions in the saturation/Color Glass Condensate framework, assuming for simplicity that one colliding nucleus is much larger than the other. We calculate the two-gluon production cross section while including all-order saturation effects in the heavy nucleus with the lowest-order rescattering in the lighter nucleus. We find four types of correlations in the two-gluon production cross section: (i) geometric correlations, (ii) HBT correlations accompanied by a back-to-back maximum, (iii) away-side correlations, and (iv) near-side azimuthal correlations which are long-range in rapidity. The geometric correlations (i) are due to the fact that nucleons are correlated by simply being confined within the same nucleus and may lead to long-range rapidity correlations for the produced particles without strong azimuthal angle dependence. Somewhat surprisingly, long-range rapidity correlations (iii) and (iv) have exactly the same amplitudes along with azimuthal and rapidity shapes: one centered around Δϕ = π with the other one centered around Δϕ = 0 (here Δϕ is the azimuthal angle between the two produced gluons). We thus observe that the early-time CGC dynamics in nucleus-nucleus collisions generates azimuthal non-flow correlations which are qualitatively different from jet correlations by being long-range in rapidity. If strong enough, they have the potential of mimicking the elliptic (and higher-order even-harmonic) flow in the di-hadron correlators: one may need to take them into account in the experimental determination of the flow observables.

KAON PRODUCTION IN RELATIVISTIC HEAVY-ION COLLISIONS: THE ROLE OF THE ELEMENTARY CROSS SECTION

1988 ◽  
Vol 03 (03) ◽  
pp. 251-256 ◽  
Author(s):  
WINFRIED ZWERMANN
Keyword(s):  
Phase Space ◽  
Cross Section ◽  
Production Cross ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Crucial Importance ◽  
Multiple Collision ◽  
Kaon Production ◽  
Ion Collisions

We investigate kaon production in relativistic heavy-ion reactions by use of a multiple collision approach. We clarify the crucial importance of the elementary kaon production cross section and show that with an appropriate parametrization suggested by phase space considerations, the data for 2.1 GeV/nucleon, Ne+NaF, can be reproduced without the need of kaon rescattering.

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