Pion production mechanism in nucleon-nucleon collisions

2000 ◽  
Author(s):  
K. Tamura
2000 ◽  
Vol 663-664 ◽  
pp. 457c-460c ◽  
Author(s):  
K. Tamura ◽  
Y. Maeda ◽  
N. Matsuoka

2001 ◽  
Vol 684 (1-4) ◽  
pp. 392-396 ◽  
Author(s):  
Y. Maeda ◽  
N. Matsuoka ◽  
K. Tamura

1981 ◽  
Vol 356 (2) ◽  
pp. 345-364 ◽  
Author(s):  
A. König ◽  
P. Kroll

1981 ◽  
Vol 106 (1-2) ◽  
pp. 29-32 ◽  
Author(s):  
J. Dubach ◽  
W.M. Kloet ◽  
A. Cass ◽  
R.R. Silbar

2007 ◽  
Vol 16 (10) ◽  
pp. 3379-3385 ◽  
Author(s):  
MEIJUAN WANG ◽  
YUANFANG WU

Rapidity and azimuthal correlation patterns for nucleon and relativistic heavy ion collisions are systematically studied by using PYTHIA for pp collisions, RQMD and AMPT for Au − Au collisions at [Formula: see text], respectively. The results show that the measures are sensitive to the collision particles, system size and production mechanism of the system.


2009 ◽  
Vol 24 (02n03) ◽  
pp. 539-543
Author(s):  
L. JOULAEIZADEH ◽  
J. BACELAR ◽  
M. ESLAMI-KALANTARI ◽  
I. GAŠPARIĆ ◽  
N. KALANTAR-NAYESTANAKI ◽  
...  

In order to study the role of pions and clustering phenomena in nuclei, two experiments have been performed using the AGOR accelerator facility. In collisions of two nuclei a pion and a fused nucleus were produced. The examined reactions were 4He(3He, π0)7Be and 6Li(4He, π0)10B at beam energies about 10 MeV above the coherent pion production threshold (256 MeV and 236.4 MeV, respectively). Since the available energy is well below the pion production threshold in an elementary nucleon-nucleon process, a highly coherent mechanism is needed. We identified the reaction by measuring the fused system in the magnetic spectrometer and the produced neutral pions in the Plastic Ball detection system with large acceptance. Our experimental setup provided the exclusive cross sections by identifying all products in overdetermined kinematics. Here we present the preliminary results of the analysis for the second reaction. Angular distribution of neutral pions will be discussed.


2019 ◽  
Vol 199 ◽  
pp. 01015
Author(s):  
T. Skorodko ◽  
H. Clement ◽  
M. Bashkanov

Pion production in nucleon-nucleon collisions is tightly connected with the issue of dibaryons. After having established the existence of the narrow dibaryon resonance d* (2380) with I(JP) = 0(3+) by two-pion production and elastic proton-neutron scattering experiments, the discussion focuses now on its structure, whether it is a dilute molecular-like or a compact hexaquark object. These scenarios are confronted with experimental branching ratios and other observables. New WASA data for the pp → ppπ+π− reaction give evidence for the existence of an isotensor ΔN threshold state with JP = 1+ as calculated recently by Gal and Garcilazo and predicted earlier by Dyson and Xuong. New ANKE results suggest the dibaryon spectrum to be richer than expected.


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