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Emergence of hadrons from color charge in QCD

Brooks, W. K. and Hakobyan, H. and Arratia, M. and Peña, C. (2013) Emergence of hadrons from color charge in QCD. In: 10th Latin American Symposium on Nuclear Physics and Applications (X LASNPA). Proceedings of Science. No.194. SISSA , Trieste, Italy, Art. No. 016.

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The propagation of colored quarks through strongly interacting systems, and their subsequent evolution into color-singlet hadrons, are phenomena that showcase unique facets of Quantum Chromodynamics (QCD). Medium-stimulated gluon bremsstrahlung, a fundamental QCD process, induces broadening of the transverse momentum of the parton, and creates partonic energy loss manifesting itself in experimental observables that are accessible in high energy interactions in hot and cold systems. The formation of hadrons, which is the dynamical enforcement of the QCD confinement principle, is very poorly understood on the basis of fundamental theory, although detailed models such as the Lund string model or cluster hadronization models can generally be tuned to capture the main features of hadronic final states. With the advent of the technical capability to study hadronic final states from lepton scattering with good particle identification and at high luminosity, a new opportunity has appeared. Study of the characteristics of parton propagation and hadron formation as they unfold within atomic nuclei are now being used to understand the coherence and spatial features of these processes and to refine new experimental tools that will be used in future experiments. Fixed-target data on nuclei with lepton and hadron beams, and collider experiments involving nuclei, all make essential contact with these topics and they elucidate different aspects of these same themes. In this paper, a survey of the most relevant recent data and its potential interpretation will be followed by descriptions of planned experiments at Jefferson Lab following the completion of the 12 GeV upgrade, and feasible measurements at a future Electron-Ion Collider.

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Additional Information:Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-ShareAlike. The authors would like to thank S. Peigne for useful discussions concerning partonic energy loss in pQCD, and F. Arleo for useful discussions about implementing energy loss in theoretical descriptions of data. We gratefully acknowledge support from the following Chilean grants: BASAL FB0821, CONICYT ACT-119, and FONDECYT #1120953 and #11121448.
Funding AgencyGrant Number
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)BASAL FB0821
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)ACT-119
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1120953
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)11121448
Series Name:Proceedings of Science
Issue or Number:194
Record Number:CaltechAUTHORS:20180910-131321030
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89490
Deposited By: George Porter
Deposited On:11 Sep 2018 15:15
Last Modified:16 Nov 2021 00:35

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