scholarly journals New parton distribution functions from a global analysis of quantum chromodynamics

2016 ◽  
Vol 93 (3) ◽  
Author(s):  
Sayipjamal Dulat ◽  
Tie-Jiun Hou ◽  
Jun Gao ◽  
Marco Guzzi ◽  
Joey Huston ◽  
...  
Keyword(s):  
Quantum Chromodynamics ◽  
Parton Distribution ◽  
Global Analysis ◽  
Distribution Functions ◽  
Parton Distribution Functions

scholarly journals Parity-odd parton distribution functions from 𝜃-vacuum

2019 ◽  
Vol 34 (26) ◽  
pp. 1950145 ◽  
Author(s):  
Weihua Yang
Keyword(s):  
Quantum Chromodynamics ◽  
Parton Distribution ◽  
Vacuum State ◽  
High Energy ◽  
Distribution Functions ◽  
Point Of View ◽  
Strong Interactions ◽  
Parton Distribution Functions ◽  
Linear Superposition ◽  
Abelian Gauge

Quantum chromodynamics is a fundamental non-Abelian gauge theory of strong interactions. The physical quantum chromodynamics vacuum state is a linear superposition of the [Formula: see text]-vacua states with different topological numbers. Because of the configuration of the gauge fields, the tunneling events can induce the local parity-odd domains. Those interactions that occur in these domains can be affected by these effects. Considering the hadron (nucleon) system, we introduce the parity-odd parton distribution functions in order to describe the parity-odd structures inside the hadron in this paper. We obtain 8 parity-odd parton distribution functions at leading twist for spin-1/2 hadrons and present their properties. By introducing the parity-odd quark–quark correlator, we find the parity-odd effects vanish from the macroscopic point of view. In this paper, we consider the high energy semi-inclusive deeply inelastic scattering process to investigate parity-odd effects by calculating the spin asymmetries.

scholarly journals Polarized parton distribution functions: parametrization and transverse momentum dependence

2021 ◽  
Vol 81 (1) ◽  
Author(s):  
H. Nematollahi ◽  
P. Abolhadi ◽  
S. Atashbar ◽  
A. Mirjalili ◽  
M. M. Yazdanpanah
Keyword(s):  
Data Analysis ◽  
Transverse Momentum ◽  
Parton Distribution ◽  
Jacobi Polynomials ◽  
Global Analysis ◽  
Distribution Functions ◽  
Momentum Dependence ◽  
Parton Distribution Functions ◽  
Transverse Momentum Dependent ◽  
Transverse Momentum Dependence

AbstractWe extract the polarized parton distribution functions (PPDFs) of proton. To this end we do a global analysis on recent and up-to-dated experimental data of polarized nucleon and deuteron structure functions at the NLO accuracy of perturbative QCD. We use the Jacobi polynomials expansion technique to do the required analyses. To achieve a more realistic estimation of the PPDFs and observable uncertainties we employ the Hessian error propagation. Following that we apply a theoretical approach which is based on imposing Lorentz structure in the parton model to investigate the transverse momentum dependence of these PPDFs. In this approach, the transverse momentum dependent (TMD) polarized parton distributions, which are also called the helicity distributions, are related to the integrated ones. This relation is indicating the priority and importance of data analysis for PPDFs. The results show a convenient general treatment expected for TMD densities which are in fact resulted from data analysis and fitting processes of integrated PPDFs in an adequate and a proper way.

scholarly journals Intrinsic charm parton distribution functions from CTEQ-TEA global analysis

2014 ◽  
Vol 89 (7) ◽  
Author(s):  
Sayipjamal Dulat ◽  
Tie-Jiun Hou ◽  
Jun Gao ◽  
Joey Huston ◽  
Jon Pumplin ◽  
...  
Keyword(s):  
Parton Distribution ◽  
Global Analysis ◽  
Distribution Functions ◽  
Parton Distribution Functions ◽  
Intrinsic Charm

scholarly journals CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis

2018 ◽  
Vol 2018 (2) ◽  
Author(s):  
Tie-Jiun Hou ◽  
Sayipjamal Dulat ◽  
Jun Gao ◽  
Marco Guzzi ◽  
Joey Huston ◽  
...  
Keyword(s):  
Parton Distribution ◽  
Global Analysis ◽  
Distribution Functions ◽  
Parton Distribution Functions ◽  
Intrinsic Charm
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