Abstract

After the development of QCD in the last quarter of the 20th century, we are now in the early years of an exciting new era in which much more quantitative QCD calculations can be tested against increasingly sophisticated experimental measurements. While there is more than one way to keep pushing forward our understanding, the proton, as a fundamental bound state of QCD, can serve as an excellent laboratory in which to probe the complexities of the strong force as we learn more about the very matter of which we ourselves are made.

Highlights

  • The arc of many fields of scientific endeavor can be delineated into an initial period of discovery and development, followed by a period of quantitative basic research, arriving at an era in which applications are developed

  • One can view the 2004 Nobel Prize awarded to Gross, Politzer, and Wilczek for their 1973 discovery of asymptotic freedom in the theory of the strong interaction as symbolically marking the closure of the initial discovery and development phase of quantum chromodynamics (QCD)

  • Research in QCD can be considered to be in the early years of the second phase: quantitative basic research

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Summary

Introduction

The arc of many fields of scientific endeavor can be delineated into an initial period of discovery and development, followed by a period of quantitative basic research, arriving at an era in which applications are developed. One can view the 2004 Nobel Prize awarded to Gross, Politzer, and Wilczek for their 1973 discovery of asymptotic freedom in the theory of the strong interaction as symbolically marking the closure of the initial discovery and development phase of quantum chromodynamics (QCD). Research in QCD can be considered to be in the early years of the second phase: quantitative basic research

Theoretical advances
Fundamental issues coming to the fore
Sea quarks
Multiparton correlations
Partonic structure of nuclei
Hadronization
Final remarks
Full Text
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