scholarly journals ON THE UNDERSTANDING AND USE OF "UNINTEGRATED" PARTON DISTRIBUTIONS IN SMALL-X QCD

2011 ◽  
Vol 04 ◽  
pp. 74-84 ◽  
Author(s):  
EMIL AVSAR
Keyword(s):  
Unintegrated Gluon ◽  
Parton Distributions ◽  
Small X ◽  
Gluon Distributions

We review and discuss the use of TMD, or "unintegrated", gluon distributions in the domain of small-x physics. The definitions employed, and the hazards of the naive applications of the TMD factorization and the associated gluon distributions are discussed.

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 Small x behavior of parton distributions with soft initial conditions

1999 ◽  
Vol 549 (1-2) ◽  
pp. 242-262 ◽  
Author(s):  
A.V. Kotikov ◽  
G. Parente
Keyword(s):  
Initial Conditions ◽  
Parton Distributions ◽  
Small X

scholarly journals Extraction of gluon distributions from structure functions at small x in holographic QCD

2020 ◽  
Vol 805 ◽  
pp. 135470 ◽  
Author(s):  
Akira Watanabe ◽  
Takahiro Sawada ◽  
Mei Huang
Keyword(s):  
Structure Functions ◽  
Small X ◽  
Holographic Qcd ◽  
Gluon Distributions

scholarly journals CHARMED MESON PRODUCTION IN PROTON–(ANTI)PROTON COLLISIONS

2007 ◽  
Vol 22 (02n03) ◽  
pp. 555-560
Author(s):  
MARTA ŁUSZCZAK ◽  
ANTONI SZCZUREK
Keyword(s):  
Heavy Quark ◽  
Meson Production ◽  
Experimental Results ◽  
Charmed Meson ◽  
Matrix Elements ◽  
Unintegrated Gluon ◽  
Proton Collisions ◽  
Shell Matrix ◽  
Gluon Distributions

We discuss and compare different approaches to include gluon transverse momenta for heavy quark-antiquark pair and meson production. The results are illustrated with the help of different unintegrated gluon distributions (UGDF) from the literature. We compare results obtained with on-shell and off-shell matrix elements and kinematics. The results are compared with recent experimental results of the CDF collaboration.

scholarly journals Transverse momentum dependent parton distributions at small-x

2017 ◽  
Vol 921 ◽  
pp. 104-126 ◽  
Author(s):  
Bo-Wen Xiao ◽  
Feng Yuan ◽  
Jian Zhou
Keyword(s):  
Transverse Momentum ◽  
Parton Distributions ◽  
Transverse Momentum Dependent ◽  
Small X

scholarly journals Analytic approaches to the evolution of polarised parton distributions at small x

1996 ◽  
Vol 365 (1-4) ◽  
pp. 347-358 ◽  
Author(s):  
T. Gehrmann ◽  
W.J. Stirling
Keyword(s):  
Parton Distributions ◽  
Small X
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