Parton Distributions in Nucleons and Nuclei

We review the current status of parton distribution function (PDF) determinations for unpolarized and longitudinally polarized protons and for unpolarized nuclei, which are probed by high-energy hadronic scattering in perturbative quantum chromodynamics (QCD). We present the established theoretical framework, the experimental information, and the methodological aspects inherent to any modern PDF extraction. Furthermore, we summarize the present knowledge of PDFs and discuss their limitations in both accuracy and precision relevant to advancing our understanding of QCD proton substructure and pursuing our quest for precision in the Standard Model and beyond. In this respect, we highlight various achievements, discuss contemporary issues in PDF analyses, and outline future directions of progress.

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Limitations of applicability of perturbative quantum chromodynamics in very-high-energy hadron collisions

Physical Review D ◽

10.1103/physrevd.24.172 ◽

1981 ◽

Vol 24 (1) ◽

pp. 172-176

Author(s):

N. G. Antoniou ◽

C. Chiou-Lahanas ◽

A. I. Karanikas ◽

S. D. P. Vlassopulos

Keyword(s):

Quantum Chromodynamics ◽

High Energy ◽

Perturbative Quantum Chromodynamics ◽

Very High Energy ◽

Perturbative Quantum ◽

Energy Hadron ◽

Very High

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Antagonizing leptin: current status and future directions

Biological Chemistry ◽

10.1515/hsz-2013-0283 ◽

2014 ◽

Vol 395 (5) ◽

pp. 499-514 ◽

Cited By ~ 6

Author(s):

Lennart Zabeau ◽

Frank Peelman ◽

Jan Tavernier

Keyword(s):

Nutritional Status ◽

Immune Responses ◽

Autoimmune Diseases ◽

High Energy ◽

Current Status ◽

Metabolic Switch ◽

Future Directions ◽

Leptin Signaling ◽

Energy Consuming

Abstract The adipocyte-derived hormone/cytokine leptin acts as a metabolic switch, connecting the body’s nutritional status to high energy consuming processes such as reproduction and immune responses. Inappropriate leptin responses can promote autoimmune diseases and tumorigenesis. In this review we discuss the current strategies to modulate leptin signaling and the possibilities for their use in research and therapy.

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Particle Production at High Energy: DGLAP, BFKL and Beyond

Universe ◽

10.3390/universe5020064 ◽

2019 ◽

Vol 5 (2) ◽

pp. 64 ◽

Cited By ~ 2

Author(s):

Jamal Jalilian-Marian

Keyword(s):

Evolution Equation ◽

Particle Production ◽

Evolution Equations ◽

High Energy ◽

Color Glass ◽

Collinear Factorization ◽

Perturbative Quantum Chromodynamics ◽

Nuclear Collisions ◽

Perturbative Quantum ◽

Regge Limit

Particle production in high energy hadronic/nuclear collisions in the Bjorken limit Q 2 , s → ∞ can be described in the collinear factorization framework of perturbative Quantum ChromoDynamics (QCD). On the other hand in the Regge limit, at fixed and not too high Q 2 with s → ∞ , a k ⊥ factorization approach (or a generalization of it) is the appropriate framework. A new effective action approach to QCD in the Regge limit, known as the Color Glass Condensate (CGC) formalism, has been developed which allows one to investigate particle production in high energy collisions in the kinematics where collinear factorization breaks down. Here we give a brief overview of particle production in CGC framework and the evolution equation which governs energy dependence of the observables in this formalism. We show that the new evolution equation reduces to previously known evolution equations in the appropriate limits.

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PERTURBATIVE QCD AT HIGH ENERGY COLLIDERS

International Journal of Modern Physics E ◽

10.1142/s0218301308010210 ◽

2008 ◽

Vol 17 (05) ◽

pp. 870-890 ◽

Cited By ~ 3

Author(s):

RICHARD J. GONSALVES

Keyword(s):

Standard Model ◽

Quantum Chromodynamics ◽

Perturbative Qcd ◽

High Energy ◽

Perturbative Quantum Chromodynamics ◽

The Standard Model ◽

Perturbative Quantum

Selected applications of perturbative Quantum chromodynamics (QCD) to predictions of the Standard Model for processes at high energy colliders are reviewed with emphasis on past successes and future problems.

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