scholarly journals Tachyon dynamics of the black disc limit in the hard small x processes in QCD

2007 ◽  
Vol 782 (1-4) ◽  
pp. 335-345
Author(s):  
B. Blok ◽  
L. Frankfurt
Keyword(s):  
Black Disc ◽  
Small X ◽  
Black Disc Limit

scholarly journals TACHYON DYNAMICS OF THE BLACK DISC LIMIT IN THE HARD SMALL x PROCESSES IN QCD

2006 ◽  
Vol 21 (07) ◽  
pp. 549-558 ◽  
Author(s):  
B. BLOK ◽  
L. FRANKFURT
Keyword(s):  
Cross Section ◽  
Impact Parameter ◽  
High Energy ◽  
Black Disk ◽  
Black Disc ◽  
Energy Behavior ◽  
Small X ◽  
The Cross ◽  
The Impact ◽  
Black Disc Limit

We investigate the effective field theory (EFT) which gives the approximate description of the scattering of two hard small dipoles in the small x processes in QCD near the black disc limit (BDL). We argue that the perturbative QCD approaches predict the existence of tachyon and visualize it in the approximation where α′P=0. We demonstrate that the high energy behavior of the cross-section depends strongly on the diffusion law in the impact parameter plane. On the other hand, almost threshold behavior of the cross section of the hard processes and multiplicities, i.e. fast increase of cross sections (color inflation), melting of ladders into color network and softening of the longitudinal distributions of hadrons are qualitatively insensitive to the value of diffusion in the impact parameter space. We evaluate α′P near the black disk limit and find significant α′P as the consequence of the probability conservation.

scholarly journals Where is the black disc limit?

1999 ◽  
Vol 11 (1) ◽  
pp. 145-151 ◽  
Author(s):  
P. Desgrolard ◽  
L. Jenkovszky ◽  
B. Struminsky
Keyword(s):  
Black Disc ◽  
Black Disc Limit

Where is the black disc limit?

1999 ◽  
Vol 11 (1) ◽  
pp. 145 ◽  
Author(s):  
P. Desgrolard ◽  
L. Jenkovszky ◽  
B. Struminsky
Keyword(s):  
Black Disc ◽  
Black Disc Limit

The Shuvaev Transform and the Skewness Effect at small x

2009 ◽  
Author(s):  
Thomas Teubner ◽  
A.D. Martin ◽  
C. Nockles ◽  
M.G. Ryskin ◽  
A.G. Shuvaev
Keyword(s):  
Small X

Use of a Method of Small X-Ray Line Shifts to Investigate the Electronic Structure of Crystal Chemical Bonds

1974 ◽  
Vol 113 (6) ◽  
pp. 360 ◽  
Author(s):  
O.M. Sumbaev ◽  
E.V. Petrovich ◽  
Yu.P. Smirnov ◽  
I.M. Band ◽  
Aleksandr I. Smirnov
Keyword(s):  
Electronic Structure ◽  
Crystal Chemical ◽  
Chemical Bonds ◽  
X Ray ◽  
Small X

PARTON DISTRIBUTION FUNCTIONS AND THE QCD-IMPROVED PARTON MODEL — AN OVERVIEW

1987 ◽  
Vol 02 (04) ◽  
pp. 1369-1387 ◽  
Author(s):  
Wu-Ki Tung
Keyword(s):  
Parton Distribution ◽  
Particle Production ◽  
Heavy Particle ◽  
Parton Model ◽  
Distribution Functions ◽  
Collider Physics ◽  
Parton Distribution Functions ◽  
Parton Distributions ◽  
First Order ◽  
Small X

Some non-trivial features of the QCD-improved parton model relevant to applications on heavy particle production and semi-hard (small-x) processes of interest to collider physics are reviewed. The underlying ideas are illustrated by a simple example. Limitations of the naive parton formula as well as first order corrections and subtractions to it are dis-cussed in a quantitative way. The behavior of parton distribution functions at small x and for heavy quarks are discussed. Recent work on possible impact of unconventional small-x behavior of the parton distributions on small-x physics at SSC and Tevatron are summarized. The Drell-Yan process is found to be particularly sensitive to the small x dependence of parton distributions. Measurements of this process at the Tevatron can provide powerful constraints on the expected rates of semi-hard processes at the SSC.

scholarly journals Rise of the DIS structure function FL at small x caused by double-logarithmic corrections

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
B. I. Ermolaev ◽  
S. I. Troyan
Keyword(s):  
Structure Function ◽  
Present Calculation ◽  
Synergic Effect ◽  
Logarithmic Approximation ◽  
Logarithmic Corrections ◽  
Small X

Abstract We present calculation of FL in the double-logarithmic approximation (DLA) and demonstrate that the synergic effect of the factor 1/x from the $$ {\alpha}_s^2 $$ α s 2 -order and the steep x-dependence of the totally resummed double logarithmic contributions of higher orders ensures the power-like rise of FL at small x and arbitrary Q2.

scholarly journals Small-x physics in perturbative QCD

1997 ◽  
Vol 286 (3) ◽  
pp. 131-198 ◽  
Author(s):  
L.N. Lipatov
Keyword(s):  
Perturbative Qcd ◽  
Small X

scholarly journals Cronin effect and high- suppression in the nuclear gluon distribution at small x

2004 ◽  
Vol 742 (1-2) ◽  
pp. 182-252 ◽  
Author(s):  
E. Iancu ◽  
K. Itakura ◽  
D.N. Triantafyllopoulos
Keyword(s):  
Gluon Distribution ◽  
Cronin Effect ◽  
Small X ◽  
Nuclear Gluon

Erratum to: “ -Factorization and small-x anomalous dimensions”

2001 ◽  
Vol 607 (1-2) ◽  
pp. 431-432 ◽  
Author(s):  
G. Camici ◽  
M. Ciafaloni
Keyword(s):  
Anomalous Dimensions ◽  
Small X
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