scholarly journals APPLIED HIGH ENERGY QCD

2009 ◽  
Vol 18 (08) ◽  
pp. 1629-1696 ◽  
Author(s):  
B. Z. KOPELIOVICH ◽  
A. H. REZAEIAN
Keyword(s):  
Evolution Equation ◽  
Parton Model ◽  
High Energy ◽  
Dglap Evolution ◽  
Color Transparency ◽  
Cronin Effect ◽  
Bjorken Scaling ◽  
Wide Range ◽  
Direct Photon Production ◽  
Dglap Evolution Equation

This review stresses the theoretical elements that underlie a wide range of phenomenological studies of high-energy QCD, which include both soft and hard processes. After a brief introduction to the basics of QCD, various aspects of QCD-based phenomenology are covered: color transparency, hadronization of color charges, Regge phenomenology, parton model, Bjorken scaling and its violation, DGLAP evolution equation, BFKL formalism, GLR-MQ evolution equation and saturation. In the last part of the review, we employ the light-cone dipole formalism to describe deep inelastic lepton scattering, Drell — Yan processes, direct photon production, diffraction, quark and gluon shadowing in nuclei, the Cronin effect and nuclear broadening.

QCD JETS AT HERA I.: O(αs) RADIATIVE CORRECTIONS TO ELECTROWEAK CROSS SECTIONS AND JET RATES

1989 ◽  
Vol 04 (07) ◽  
pp. 1781-1825 ◽  
Author(s):  
JÜRGEN G. KÖRNER ◽  
ERWIN MIRKES ◽  
GERHARD A. SCHULER
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Neutral Current ◽  
High Energy ◽  
Coupling Constant ◽  
Bjorken Scaling ◽  
Born Cross Section ◽  
Wide Range ◽  
Lepton Polarization ◽  
Jet Cross Sections

We present the complete O(αs) corrections to the electroweak cross sections of both neutral current and charged current deep inelastic e±p scattering including lepton polarization effects. Changes in the cross section due to the inclusion of next-to-leading-log (NLL) effects are parametrized by K factors, which are defined as the ratio of the NLL O(αs) cross sections and the Born cross section. Using the standard redefinition scheme of the parton densities, we find that the K factors deviate substantially from unity for small values of the Bjorken-Scaling variable x. We also elaborate on problems that arise when defining jet cross sections in ep scattering and present numerical results for the O(αs) 3-jet and 2-jet rates. We observe that the Q2-dependence of the 3-jet rate is dominated by the running strong coupling constant αs(Q2) allowing for its determination over a wide range in Q2 at high energy ep colliders.

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.

Unpolarized coupled DGLAP evolution equation at small-x

Pramana ◽  
2013 ◽  
Vol 80 (1) ◽  
pp. 61-68 ◽  
Author(s):  
SAURAV BHATTACHARJEE ◽  
RANJIT BAISHYA ◽  
JAYANTA KUMAR SARMA
Keyword(s):  
Evolution Equation ◽  
Dglap Evolution ◽  
Small X ◽  
Dglap Evolution Equation

DGLAP and BFKL Equations now

2003 ◽  
Vol 18 (supp01) ◽  
pp. 68-90 ◽  
Author(s):  
L. N. Lipatov
Keyword(s):  
Evolution Equations ◽  
Gauge Theories ◽  
Parton Model ◽  
High Energy ◽  
Effective Theory ◽  
Dglap Evolution ◽  
Regge Trajectories ◽  
Supersymmetric Gauge ◽  
Energy Hadron ◽  
Inelastic Processes

The s and t-channel approaches to the high energy hadron scattering are reviewed. The parton model is applied to describe the high energy and deep-inelastic processes. In QCD the parton picture leads to the DGLAP evolution equations for the parton distributions. The gluon and quark are shown to lie on their Regge trajectories. The integrability properties of the effective theory for the high energy QCD in the multi-colour limit are outlined. The Baxter - Sklyanin representation for the wave function of the composite colourless states is formulated. Next-to-leading corrections to the BFKL equation in QCD and supersymmetric gauge theories are discussed. The effective action for the gluon and quark integrations local in the parton rapidities is presented.

Microfabrication research at the National Submicron Facility

1983 ◽  
Vol 41 ◽  
pp. 86-89
Author(s):  
E.D. Wolf
Keyword(s):  
Integrated Circuits ◽  
Particle Physics ◽  
High Speed ◽  
New Technology ◽  
High Energy ◽  
High Energy Particle ◽  
New Science ◽  
Wide Range ◽  
Intermediate Domain ◽  
Circuit Function

Most microelectronics devices and circuits operate faster, consume less power, execute more functions and cost less per circuit function when the feature-sizes internal to the devices and circuits are made smaller. This is part of the stimulus for the Very High-Speed Integrated Circuits (VHSIC) program. There is also a need for smaller, more sensitive sensors in a wide range of disciplines that includes electrochemistry, neurophysiology and ultra-high pressure solid state research. There is often fundamental new science (and sometimes new technology) to be revealed (and used) when a basic parameter such as size is extended to new dimensions, as is evident at the two extremes of smallness and largeness, high energy particle physics and cosmology, respectively. However, there is also a very important intermediate domain of size that spans from the diameter of a small cluster of atoms up to near one micrometer which may also have just as profound effects on society as “big” physics.

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