scholarly journals Double parton distributions out of bounds in colour space

2021 ◽  
Vol 81 (11) ◽  
Author(s):  
M. Diehl ◽  
J. R. Gaunt ◽  
P. Pichini ◽  
P. Plößl
Keyword(s):  
Small Distance ◽  
Leading Order ◽  
Colour Space ◽  
Parton Distributions

AbstractWe investigate the positivity of double parton distributions with a non-trivial dependence on the parton colour. It turns out that positivity is not preserved by leading-order evolution from lower to higher scales, in contrast to the case in which parton colour is summed over. We also study the positivity properties of the distributions at small distance between the two partons, where they can be computed in terms of perturbative splitting kernels and ordinary parton densities.

HIGH pT JET PRODUCTION IN pp COLLISIONS

1995 ◽  
Vol 10 (20n21) ◽  
pp. 3071-3085 ◽  
Author(s):  
K.J. ESKOLA ◽  
X.-N. WANG
Keyword(s):  
Cross Sections ◽  
Leading Order ◽  
Pp Collisions ◽  
Production Rates ◽  
Parton Distributions ◽  
Jet Production ◽  
Order Calculation ◽  
Jet Cross Sections

Production rates of large pT jets inpp collisions at RHIC and LHC energies are studied using the next-to-leading order calculation of S.D. Ellis, Z. Kunszt and D. Soper. The computed inclusive one-jet cross sections are compared against the CERN and Fermilab jet data from [Formula: see text] and pp collisions. The dependence of the results on the choice of parton distributions and renormalization/factorization scales is investigated.

SCALE DEPENDENCE OF TWIST-3 CORRELATION FUNCTIONS

2011 ◽  
Vol 04 ◽  
pp. 146-156
Author(s):  
Zhong-Bo Kang ◽  
Jian-Wei Qiu
Keyword(s):  
Correlation Functions ◽  
Evolution Equations ◽  
Scale Dependence ◽  
Leading Order ◽  
Coupling Constant ◽  
Parton Distributions ◽  
Spin Asymmetries ◽  
Single Spin ◽  
Single Spin Asymmetries ◽  
Similarities And Differences

In this talk, we introduce two sets of twist-3 quark-gluon correlation functions that are relevant to transverse single spin asymmetries, and present corresponding evolution equations at the leading order in strong coupling constant, αs. The similarities and differences between the evolution of the leading power parton distributions and that of the twist-3 multiparton correlation functions are also discussed.

scholarly journals Evolution of non-forward parton distributions in next-to-leading order: singlet sector

1999 ◽  
Vol 546 (1-2) ◽  
pp. 279-298 ◽  
Author(s):  
A.V. Belitsky ◽  
D. Müller ◽  
L. Niedermeier ◽  
A. Schäfer
Keyword(s):  
Leading Order ◽  
Parton Distributions

scholarly journals DEEP INELASTIC NEUTRINO INTERACTIONS

2005 ◽  
Vol 20 (19) ◽  
pp. 4664-4669
Author(s):  
MARY HALL RENO
Keyword(s):  
Cross Section ◽  
Leading Order ◽  
Weak Mixing Angle ◽  
Weak Mixing ◽  
Parton Distributions ◽  
Mixing Angle ◽  
Neutrino Interactions ◽  
Isospin Violation

Next-to-leading order QCD corrections, order 1 GeV mass corrections and the role of a strangeness asymmetry and isospin violation in the x dependence of parton distributions are evaluated in the context of the neutrino-nucleon cross section. Their contributions to evaluations of the weak mixing angle using the Paschos-Wolfenstein relation are discussed.

scholarly journals Next-to-Leading order approximation of polarized valon and parton distributions

2004 ◽  
Vol 2004 (10) ◽  
pp. 062-062 ◽  
Author(s):  
Ali N Khorramian ◽  
A Mirjalili ◽  
S. Atashbar Tehrani
Keyword(s):  
Order Approximation ◽  
Leading Order ◽  
Parton Distributions
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