scholarly journals Running coupling corrections to high energy inclusive gluon production

2011 ◽  
Vol 849 (1) ◽  
pp. 72-97 ◽  
Author(s):  
W.A. Horowitz ◽  
Yuri V. Kovchegov
Keyword(s):  
High Energy ◽  
Running Coupling ◽  
Gluon Production

scholarly journals Higher-twist mechanism and inclusive gluon production in pion–proton collisions

2015 ◽  
Vol 30 (36) ◽  
pp. 1550217
Author(s):  
A. I. Ahmadov ◽  
C. Aydin ◽  
R. Myrzakulov ◽  
O. Uzun
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Production Cross Section ◽  
Production Cross ◽  
Feynman Diagrams ◽  
Proton Collisions ◽  
Running Coupling ◽  
Gluon Production ◽  
Coupling Approach ◽  
Holographic Qcd

We calculate the contribution of the higher-twist Feynman diagrams to the large-[Formula: see text] inclusive gluon production cross-section in [Formula: see text] collisions in case of the running coupling and frozen coupling approaches within perturbative and holographic QCD. The structure of infrared renormalon singularities of the higher-twist subprocess cross-section is obtained and the resummed higher-twist cross-sections (Borel sum) with the ones obtained in the framework of the frozen coupling approach and leading-twist cross-section are compared and analyzed.

scholarly journals GLUON PRODUCTION AMPLITUDES FOR $q\bar{q}$ HIGH ENERGY BACKWARD SCATTERING

1989 ◽  
Vol 04 (13) ◽  
pp. 3147-3162 ◽  
Author(s):  
B.I. ERMOLAEV ◽  
L.N. LIPATOV
Keyword(s):  
Scattering Amplitudes ◽  
Differential Equations ◽  
Factorization Method ◽  
High Energy ◽  
Logarithmic Approximation ◽  
Gluon Production ◽  
Gluon Bremsstrahlung

A factorization method is used for the investigation of gluon bremsstrahlung in the quark-antiquark backward scattering. The differential equations for scattering amplitudes are obtained in a double-logarithmic approximation. These equations are solved for some cases of interest.

scholarly journals On systematic effects in the numerical solutions of the JIMWLK equation

2021 ◽  
Vol 81 (7) ◽  
Author(s):  
Salvatore Calì ◽  
Krzysztof Cichy ◽  
Piotr Korcyl ◽  
Piotr Kotko ◽  
Krzysztof Kutak ◽  
...  
Keyword(s):  
Numerical Solutions ◽  
High Energy ◽  
Gluon Density ◽  
Longitudinal Momentum ◽  
Coupling Constant ◽  
Longitudinal Momentum Fraction ◽  
Running Coupling ◽  
Systematic Effects ◽  
Gluon Distributions ◽  
Comprehensive Study

AbstractIn the high energy limit of hadron collisions, the evolution of the gluon density in the longitudinal momentum fraction can be deduced from the Balitsky hierarchy of equations or, equivalently, from the nonlinear Jalilian–Marian–Iancu–McLerran–Weigert–Leonidov–Kovner (JIMWLK) equation. The solutions of the latter can be studied numerically by using its reformulation in terms of a Langevin equation. In this paper, we present a comprehensive study of systematic effects associated with the numerical framework, in particular the ones related to the inclusion of the running coupling. We consider three proposed ways in which the running of the coupling constant can be included: “square root” and “noise” prescriptions and the recent proposal by Hatta and Iancu. We implement them both in position and momentum spaces and we investigate and quantify the differences in the resulting evolved gluon distributions. We find that the systematic differences associated with the implementation technicalities can be of a similar magnitude as differences in running coupling prescriptions in some cases, or much smaller in other cases.

scholarly journals HIGH ENERGY SCATTERING IN QUANTUM CHROMODYNAMICS

2007 ◽  
Vol 16 (09) ◽  
pp. 2595-2637 ◽  
Author(s):  
FRANÇOIS GELIS ◽  
TUOMAS LAPPI ◽  
RAJU VENUGOPALAN
Keyword(s):  
Quantum Chromodynamics ◽  
Parton Model ◽  
High Energy ◽  
Color Glass ◽  
Energy Scattering ◽  
Bjorken Scaling ◽  
Gluon Production ◽  
Transverse Resolution ◽  
High Energy Scattering ◽  
Hadronic Collisions

In this series of three lectures, we discuss several aspects of high energy scattering among hadrons in Quantum Chromodynamics. The first lecture is devoted to a description of the parton model, Bjorken scaling and the scaling violations due to the evolution of parton distributions with the transverse resolution scale. The second lecture describes parton evolution at small momentum fraction x, the phenomenon of gluon saturation and the Color Glass Condensate (CGC). In the third lecture, we present the application of the CGC to the study of high energy hadronic collisions, with emphasis on nucleus-nucleus collisions. In particular, we provide the outline of a proof of high energy factorization for inclusive gluon production.

scholarly journals Comparing Two Different Initial Conditions AAMQS and Quartic Action in Illustrating the Effect of Valence Color Charges in High-EnergypACollisions at Forward Rapidity

2013 ◽  
Vol 2013 ◽  
pp. 1-14
Author(s):  
Ye-Yin Zhao ◽  
Ya-Hui Chen ◽  
Ya-Qin Gao ◽  
Fu-Hu Liu
Keyword(s):  
Particle Production ◽  
Initial Conditions ◽  
Hadron Collider ◽  
Heavy Ion ◽  
High Energy ◽  
Color Glass ◽  
Forward Rapidity ◽  
Relativistic Heavy Ion Collider ◽  
Proton Proton ◽  
Running Coupling

The inclusive particle productions in proton-proton (pp) and deuton-gold (d+Au) collisions at forward rapidity at the Relativistic Heavy Ion Collider (RHIC) energy are studied in the framework of the color glass condensate (CGC) theory by using two different initial conditions: AAMQS (Albacete-Armesto-Milhano-Quiroga-Salgado) and quartic action. Then, the results obtained by the two different initial conditions in illustrating the effect of valence color charges in high-energy proton-nucleus (pA) collisions at forward energy are compared. Meanwhile, the inclusive particle productions inpAcollisions at forward rapidity at the Large Hadron Collider (LHC) energies are predicted. The main dynamical input in our calculations is the use of solutions of the running coupling Balitsky-Kovchegov equation tested in electron-proton (ep) collision data. Particle production is computed via the hybrid formalisms to obtain spectra and yields. These baseline predictions are useful for testing the current understanding of the dynamics of very strong color fields against the upcoming LHC data.

Sign in / Sign up

Export Citation Format

Share Document