scholarly journals Exact relations for twist-3 gluon distribution and fragmentation functions from operator identities

2020 ◽  
Vol 101 (5) ◽  
Author(s):  
Yuji Koike ◽  
Kenta Yabe ◽  
Shinsuke Yoshida
Keyword(s):  
Gluon Distribution ◽  
Fragmentation Functions ◽  
Exact Relations

scholarly journals HIGH-ENERGY QCD FACTORIZATION FROM DIS TO pA COLLISIONS

2012 ◽  
Vol 20 ◽  
pp. 200-207 ◽  
Author(s):  
GIOVANNI ANTONIO CHIRILLI
Keyword(s):  
Gluon Distribution ◽  
Wilson Line ◽  
Energy Operator ◽  
High Energy ◽  
Distribution Functions ◽  
Operator Product ◽  
Parton Distribution Functions ◽  
Qcd Factorization ◽  
Fragmentation Functions ◽  
Line Operator

The high-energy QCD factorization for Deep Inelastic Scattering and for proton-nucleus collisions using Wilson line formalism and factorization in rapidity is discussed. We show that in DIS the factorization in rapidity reduces to the k T -factorization when the 2-gluon approximation is applied, provided that the composite Wilson line operator is used in the high-energy Operator Product Expansion. We then show that the inclusive forward cross-section in proton-nucleus collisions factorizes in parton distribution functions, fragmentation functions and dipole gluon distribution function at one-loop level.

scholarly journals B-meson production in the Parton Reggeization Approach at Tevatron and the LHC

2015 ◽  
Vol 30 (04n05) ◽  
pp. 1550023 ◽  
Author(s):  
A. V. Karpishkov ◽  
M. A. Nefedov ◽  
V. A. Saleev ◽  
A. V. Shipilova
Keyword(s):  
Gluon Distribution ◽  
B Meson ◽  
Meson Production ◽  
Lhcb Collaboration ◽  
Leading Order ◽  
Unintegrated Gluon ◽  
Momentum Distributions ◽  
Theoretical Predictions ◽  
Fragmentation Functions ◽  
Free Parameters

We study the inclusive hadroproduction of B0, B+ and [Formula: see text] mesons at leading order in the Parton Reggeization Approach using the universal fragmentation functions extracted from the combined e+e- annihilation data from CERN LEP1 and SLAC SLC colliders. We have described B-meson transverse momentum distributions measured in the central region of rapidity by the CDF Collaboration at Fermilab Tevatron and CMS Collaboration at LHC within uncertainties and without free parameters, applying Kimber–Martin–Ryskin unintegrated gluon distribution function in a proton. The forward B-meson production (2.0<y<4.5) measured by the LHCb Collaboration also has been studied and expected disagreement between our theoretical predictions and data has been obtained.

SEMI-INCLUSIVE HADRON PAIR PRODUCTION AND POLARIZED GLUONS IN THE PROTON

2003 ◽  
Vol 18 (08) ◽  
pp. 1273-1280
Author(s):  
YU-BING DONG ◽  
T. MORII ◽  
T. YAMANISHI
Keyword(s):  
Pair Production ◽  
Cross Sections ◽  
Gluon Distribution ◽  
Gluon Fusion ◽  
Symmetry Relation ◽  
Signal Process ◽  
Production Processes ◽  
Light Hadron ◽  
Fragmentation Functions ◽  
New Formula

To extract the polarized gluon distribution Δg, we study the large–pTlight hadron pair productions in polarized semi-inclusive reaction, which are dominantly produced via 2 mechanisms: photon–gluon fusion(PGF) and QCD Compton. The PGF gives us a direct information on Δg in the nucleon, whereas QCD Compton is background to the signal process for extracting Δg. By using symmetry relation among fragmentation functions and taking an appropriate combination of light hadron pair production processes, we can remove an effect of QCD Compton from those cross sections. Here we propose a new formula for extracting Δg from those processes.

scholarly journals Probing quark fragmentation functions for baryon production in unpolarized e+e− annihilation

1995 ◽  
Vol 445 (2-3) ◽  
pp. 380-396 ◽  
Author(s):  
Kun Chen ◽  
Gary R. Goldstein ◽  
R.L. Jaffe ◽  
Xiangdong Ji
Keyword(s):  
Baryon Production ◽  
Quark Fragmentation ◽  
Fragmentation Functions

scholarly journals New exact relations for steady irrotational two-dimensional gravity and capillary surface waves

2017 ◽  
Vol 376 (2111) ◽  
pp. 20170220 ◽  
Author(s):  
Didier Clamond
Keyword(s):  
Free Surface ◽  
Gravity Waves ◽  
Water Waves ◽  
Two Dimensional ◽  
Physical Plane ◽  
Theme Issue ◽  
Nonlinear Water Waves ◽  
Dimensional Gravity ◽  
Irrotational Motion ◽  
Exact Relations

Steady two-dimensional surface capillary–gravity waves in irrotational motion are considered on constant depth. By exploiting the holomorphic properties in the physical plane and introducing some transformations of the boundary conditions at the free surface, new exact relations and equations for the free surface only are derived. In particular, a physical plane counterpart of the Babenko equation is obtained. This article is part of the theme issue ‘Nonlinear water waves’.

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
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