High-Energy Limit of Pion-Nucleon Total Cross Section

1965 ◽  
Vol 138 (1B) ◽  
pp. B242-B245 ◽  
Author(s):  
Masao Sugawara ◽  
Arnold Tubis
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
High Energy ◽  
Energy Limit ◽  
High Energy Limit ◽  
Pion Nucleon

High-Energy Limit ofπ+π0Total Cross Section

1966 ◽  
Vol 144 (4) ◽  
pp. 1308-1315 ◽  
Author(s):  
F. T. Meiere ◽  
Masao Sugawara
Keyword(s):  
Cross Section ◽  
High Energy ◽  
Energy Limit ◽  
High Energy Limit

scholarly journals Gluon GPDs and exclusive photoproduction of quarkonium in forward region

2019 ◽  
Vol 79 (10) ◽  
Author(s):  
Z. L. Cui ◽  
M. C. Hu ◽  
J. P. Ma
Keyword(s):  
Cross Section ◽  
Quark Mass ◽  
High Energy ◽  
Power Correction ◽  
Energy Limit ◽  
Forward Region ◽  
Parton Distributions ◽  
High Energy Limit ◽  
Heavy Quark Mass ◽  
Generalized Parton Distributions

Abstract Forward photoproduction of $$J/\psi $$J/ψ can be used to extract generalized parton distributions (GPDs) of gluons. We analyze the process at twist-3 level and study relevant classifications of twist-3 gluon GPDs. At leading power or twist-2 level the produced $$J/\psi $$J/ψ is transversely polarized. We find that at twist-3 the produced $$J/\psi $$J/ψ is longitudinally polarized. Our study shows that in the high-energy limit the twist-3 amplitude is only suppressed by the inverse power of the heavy quark mass relatively to the twist-2 amplitude. This indicates that the power correction to the cross-section of unpolarized $$J/\psi $$J/ψ can have a sizable effect.The poles in the hard factor convoluted with twist-3 gluon GPDs may concern the GPDs discontinuities, which will be briefly discussed in this work. We have also derived the amplitude of the production of $$h_c$$hc at twist-3, but the result contains end-point singularities. The production of other quarkonia has been briefly discussed.

HIGH ENERGY LIMIT IN QCD

2011 ◽  
Vol 26 (09) ◽  
pp. 603-623
Author(s):  
ANNA M. STASTO
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Energy Limit ◽  
High Energy Limit ◽  
Ion Collisions ◽  
Small X

We briefly review some selected topics in the small x physics. In particular, we discuss the progress in the problem related to the resummation at small x and the parton saturation phenomena. Finally we discuss some phenomenological applications to deep inelastic scattering, hadron and heavy ion collisions.

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