scholarly journals Projectile Fragmentation in Hadron-Nucleus Collisions and the Quark Model

1981 ◽  
Vol 65 (4) ◽  
pp. 1350-1360 ◽  
Author(s):  
F. Takagi
Keyword(s):  
Quark Model ◽  
Projectile Fragmentation

A study of inelastic hadron–nucleus interactions at 50 and 400 GeV

1984 ◽  
Vol 62 (3) ◽  
pp. 218-225 ◽  
Author(s):  
H. Ahrar ◽  
S. Ahmad ◽  
M. Zafar ◽  
M. Irfan ◽  
M. Shafi
Keyword(s):  
Quark Model ◽  
Charged Particles ◽  
Target Size ◽  
Projectile Fragmentation ◽  
Particle Multiplicity ◽  
Nuclear Mass ◽  
Target Fragmentation ◽  
Pseudorapidity Distributions ◽  
Grey Particle

Some results on multiplicity, mean normalized multiplicity, and pseudorapidity distributions of shower particles produced in pion–nucleus and proton–nucleus collisions at 50 and 400 GeV are presented and discussed. From the study of the pseudorapidity distributions, it is found that the projectile fragmentation is mass independent and the target fragmentation depends upon the target size. The effect of nuclear mass on the forward–backward asymmetry is also examined by using the grey particle multiplicity data. Upon using the additive quark model, a new kind of nuclear scaling is observed between RA4, in terms of created charged particles and [Formula: see text].

A study of particle–nucleus collisions at 24, 50, and 400 GeV/c

1982 ◽  
Vol 60 (10) ◽  
pp. 1523-1533 ◽  
Author(s):  
H. Khushnood ◽  
M. Irfan ◽  
M. Zafar ◽  
A. Ahmad ◽  
A. R. Khan ◽  
...  
Keyword(s):  
Quark Model ◽  
Target Nucleus ◽  
Incident Energy ◽  
Mass Number ◽  
Projectile Fragmentation ◽  
Fragmentation Region ◽  
Target Fragmentation ◽  
The Mean ◽  
Pseudorapidity Distributions

An attempt has been made to investigate multiplicity, dispersion, and pseudorapidity distributions of shower particles produced in 24, 50, and 400 GeV/c hadron–nucleus collisions. The study of pseudorapidity reveals that with the increase in the mass number of the target nucleus, the excess of particles appears in the target fragmentation region, shifting the maxima of the distributions towards smaller values of rapidity. Further, with the increase in the incident energy, the excess of particles appears in the projectile fragmentation region. Finally, on using the additive quark model, the mean normalized multiplicity has been observed to be independent of the energy and nature of the projectile, suggesting a new kind of scaling in hadron–nucleus collisions.

DISSIPATIVE EFFECTS IN PROJECTILE FRAGMENTATION AND PARTICLES EVAPORATION

1987 ◽  
Vol 48 (C2) ◽  
pp. C2-175-C2-178
Author(s):  
A. BONASERA ◽  
M. DI TORO ◽  
C. GREGOIRE
Keyword(s):  
Projectile Fragmentation ◽  
Dissipative Effects

High-energy meson-baryon scattering in a quark model

1974 ◽  
Vol 9 (7) ◽  
pp. 2056-2063 ◽  
Author(s):  
Ramesh Chand
Keyword(s):  
Quark Model ◽  
High Energy

scholarly journals sQq¯q¯ ( q=u , d ; Q=c , b ) tetraquarks in the chiral quark model

2021 ◽  
Vol 103 (7) ◽  
Author(s):  
Gang Yang ◽  
Jialun Ping ◽  
Jorge Segovia
Keyword(s):  
Quark Model ◽  
Chiral Quark Model

scholarly journals The Genuine Resonance of Full-Charm Tetraquarks

Universe ◽  
2021 ◽  
Vol 7 (5) ◽  
pp. 155
Author(s):  
Xiaoyun Chen
Keyword(s):  
Quark Model ◽  
Bound States ◽  
Expansion Method ◽  
Chiral Quark Model ◽  
Stabilization Method ◽  
Scaling Method ◽  
Resonance States ◽  
Gaussian Expansion Method ◽  
Color Structure ◽  
Quantum Numbers

In this work, the genuine resonance states of full-charm tetraquark systems with quantum numbers JPC=0++,1+−,2++ are searched in a nonrelativistic chiral quark model with the help of the Gaussian Expansion Method. In this calculation, two structures, meson-meson and diquark–antidiquark, as well as their mixing with all possible color-spin configurations, are considered. The results show that no bound states can be formed. However, resonances are possible because of the color structure. The genuine resonances are identified by the stabilization method (real scaling method). Several resonances for the full-charm system are proposed, and some of them are reasonable candidates for the full-charm states recently reported by LHCb.

scholarly journals Gluon spin in a quark model

1998 ◽  
Vol 431 (3-4) ◽  
pp. 405-409 ◽  
Author(s):  
V. Barone ◽  
T. Calarco ◽  
A. Drago
Keyword(s):  
Quark Model ◽  
Gluon Spin
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