scholarly journals Higgs production within $k_t$-factorization with unintegrated gluon distribution functions

2014 ◽  
Author(s):  
Rafal Maciula ◽  
Antoni Szczurek ◽  
Marta Luszczak
Keyword(s):  
Gluon Distribution ◽  
Distribution Functions ◽  
Higgs Production ◽  
Unintegrated Gluon

scholarly journals DIFFRACTIVE DOUBLE-ELASTIC PRODUCTION OF η′ AND ηc IN THE pp → pXp REACTION

2007 ◽  
Vol 22 (02n03) ◽  
pp. 667-671 ◽  
Author(s):  
ANTONI SZCZUREK
Keyword(s):  
Gluon Distribution ◽  
Azimuthal Angle ◽  
Distribution Functions ◽  
Unintegrated Gluon ◽  
Angle Difference

I discuss double-diffractive (double-elastic) production of the η′ and ηc mesons in the pp → pXp reaction within the formalism of unintegrated gluon distribution functions (UGDF). The contribution of γ*γ* → η′ fusion is estimated. The distributions in the Feynman xF (or rapidity), transferred four-momenta squared between initial and final protons (t1, t2) and azimuthal angle difference between outgoing protons (Φ) are calculated and discussed. The results are compared with the WA102 data. Predictions at higher energies are presented.

EXCLUSIVE SCALAR MESON PRODUCTION: FROM HIGH TO INTERMEDIATE ENERGIES

2009 ◽  
Vol 24 (02n03) ◽  
pp. 422-427
Author(s):  
ANTONI SZCZUREK
Keyword(s):  
Gluon Distribution ◽  
Scalar Meson ◽  
Meson Production ◽  
Distribution Functions ◽  
Unintegrated Gluon ◽  
Exclusive Production ◽  
Intermediate Energies

I discuss exclusive production of the χc(0+) and f0(1500) mesons in pp and [Formula: see text] collisions at high and intermediate energies. QCD diffractive mechanisms as well as some non-diffractive mechanisms are included. Different unintegrated gluon distribution functions (UGDF) are used. Some differential distributions are shown and discussed.

scholarly journals Constraints on gluon distribution functions in the nucleon and nucleus from open charm hadron production at the Electron-Ion Collider

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
Matthew Kelsey ◽  
Reynier Cruz-Torres ◽  
Xin Dong ◽  
Yuanjing Ji ◽  
Sooraj Radhakrishnan ◽  
...  
Keyword(s):  
Gluon Distribution ◽  
Hadron Production ◽  
Open Charm ◽  
Distribution Functions ◽  
Charm Hadron

UNCERTAINTY OF POLARIZED PARTON DISTRIBUTIONS

2003 ◽  
Vol 18 (08) ◽  
pp. 1203-1210 ◽  
Author(s):  
◽  
M. HIRAI ◽  
Y. GOTO ◽  
T. HORAGUCHI ◽  
H. KOBAYASHI ◽  
...  
Keyword(s):  
Experimental Data ◽  
Parton Distribution ◽  
Gluon Distribution ◽  
Distribution Functions ◽  
Prompt Photon ◽  
Parton Distribution Functions ◽  
Parton Distributions ◽  
Photon Process ◽  
Hessian Method ◽  
Polarized Gluon

Polarized parton distribution functions are determined by a χ2 analysis of polarized deep inelastic experimental data. In this paper, uncertainty of obtained distribution functions is investigated by a Hessian method. We find that the uncertainty of the polarized gluon distribution is fairly large. Then, we estimate the gluon uncertainty by including the fake data which are generated from prompt photon process at RHIC. We observed that the uncertainty could be reduced with these data.

scholarly journals Spin-Dependent Coupled Altarelli-Parisi Equations in the NLO and the Method of Successive Approximations

2012 ◽  
Vol 2012 ◽  
pp. 1-22 ◽  
Author(s):  
Ranjit Choudhury ◽  
D. K. Choudhury
Keyword(s):  
Gluon Distribution ◽  
Quark Distribution ◽  
Distribution Functions ◽  
Integrodifferential Equations ◽  
Successive Approximations ◽  
Method Of Successive Approximations ◽  
Leading Order ◽  
Order Linear ◽  
First Order ◽  
Analytic Expressions

The coupled Altarelli-Parisi (AP) equations for polarized singlet quark distribution and polarized gluon distribution, when considered in the small x limit of the next to leading order (NLO) splitting functions, reduce to a system of two first order linear nonhomogeneous integrodifferential equations. We have applied the method of successive approximations to obtain the solutions of these equations. We have applied the same method to obtain the approximate analytic expressions for spin-dependent quark distribution functions with individual flavour and polarized structure functions for nucleon.

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