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Title: Nucleon Viewed as a Borromean Bound-State

Abstract

We explain how the emergent phenomenon of dynamical chiral symmetry breaking ensures that Poincare covariant analyses of the three valence-quark scattering problem in continuum quantum field theory yield a picture of the nucleon as a Borromean bound-state, in which binding arises primarily through the sum of two separate contributions. One involves aspects of the non-Abelian character of Quantum Chromodynamics that are expressed in the strong running coupling and generate tight, dynamical color-antitriplet quark-quark correlations in the scalar-isoscalar and pseudovector-isotriplet channels. This attraction is magnified by quark exchange associated with diquark breakup and reformation, which is required in order to ensure that each valence-quark participates in all diquark correlations to the complete extent allowed by its quantum numbers. Combining these effects, we arrive at a properly antisymmetrised Faddeev wave function for the nucleon and calculate, e.g. the flavor-separated versions of the Dirac and Pauli form factors and the proton's leading-twist parton distribution amplitude. We conclude that available data and planned experiments are capable of validating the proposed picture.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
European Union - Horizon 2020 Research and Innovation Programme; Spanish Ministerio de Economia y Competitividad (MINECO); USDOE Office of Science - Office of Nuclear Physics
OSTI Identifier:
1461281
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 2017 Critical Stability of Quantum Few-Body Systems, 10/09/17 - 10/20/17, Dresden, Germany
Country of Publication:
United States
Language:
English

Citation Formats

Segovia, Jorge, Mezrag, Cedric, Chang, Lei, and Roberts, Craig D. Nucleon Viewed as a Borromean Bound-State. United States: N. p., 2018. Web. doi:10.1007/s00601-018-1341-7.
Segovia, Jorge, Mezrag, Cedric, Chang, Lei, & Roberts, Craig D. Nucleon Viewed as a Borromean Bound-State. United States. doi:10.1007/s00601-018-1341-7.
Segovia, Jorge, Mezrag, Cedric, Chang, Lei, and Roberts, Craig D. Tue . "Nucleon Viewed as a Borromean Bound-State". United States. doi:10.1007/s00601-018-1341-7. https://www.osti.gov/servlets/purl/1461281.
@article{osti_1461281,
title = {Nucleon Viewed as a Borromean Bound-State},
author = {Segovia, Jorge and Mezrag, Cedric and Chang, Lei and Roberts, Craig D.},
abstractNote = {We explain how the emergent phenomenon of dynamical chiral symmetry breaking ensures that Poincare covariant analyses of the three valence-quark scattering problem in continuum quantum field theory yield a picture of the nucleon as a Borromean bound-state, in which binding arises primarily through the sum of two separate contributions. One involves aspects of the non-Abelian character of Quantum Chromodynamics that are expressed in the strong running coupling and generate tight, dynamical color-antitriplet quark-quark correlations in the scalar-isoscalar and pseudovector-isotriplet channels. This attraction is magnified by quark exchange associated with diquark breakup and reformation, which is required in order to ensure that each valence-quark participates in all diquark correlations to the complete extent allowed by its quantum numbers. Combining these effects, we arrive at a properly antisymmetrised Faddeev wave function for the nucleon and calculate, e.g. the flavor-separated versions of the Dirac and Pauli form factors and the proton's leading-twist parton distribution amplitude. We conclude that available data and planned experiments are capable of validating the proposed picture.},
doi = {10.1007/s00601-018-1341-7},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}

Conference:
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