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Title: Process-Independent Effective Coupling from QCD Green's Functions to Phenomenology

Abstract

This article reports on a very recent proposal for a new type of process-independent QCD effective charge (Binosi et al. in Phys Rev D 96(5):054026, 2017. https://doi.org/10.1103/PhysRevD.96.054026) defined, as an anologue of the Gell-Mann-Low effective charge in QCD, on the ground of nothing but the knowledge of the gauge-field two-point Green's function, albeit modified within a particular computational framework; namely, the combination of pinch technique and background field method which makes possible a systematic rearranging of classes of diagrams in order to redefine the Green's function and have them obey linear QED-like Slavnov-Taylor identities. We have here calculated that effective charge, shown how strikingly well it compares to a process-dependent effective charge based on the Bjorken sum rule; and, finally, employed it in an exploratory calculation of the proton electromagnetic form factor in the hard scattering regime.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Spanish Ministerio de Economia y Competitividad (MINECO); USDOE Office of Science - Office of Nuclear Physics
OSTI Identifier:
1487140
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 11th International Workshop on the Physics of Excited Nucleons , 08/20/17 - 08/23/17, Columbia, SC, US
Country of Publication:
United States
Language:
English
Subject:
QCD Green’s functions; confinement; nucleon form factors; strong interaction coupling and masses

Citation Formats

Rodriguez-Quintero, Jose, Binosi, Daniele, Mezrag, Cedric, Papavassiliou, Joannis, and Roberts, Craig D. Process-Independent Effective Coupling from QCD Green's Functions to Phenomenology. United States: N. p., 2018. Web. doi:10.1007/s00601-018-1437-0.
Rodriguez-Quintero, Jose, Binosi, Daniele, Mezrag, Cedric, Papavassiliou, Joannis, & Roberts, Craig D. Process-Independent Effective Coupling from QCD Green's Functions to Phenomenology. United States. doi:10.1007/s00601-018-1437-0.
Rodriguez-Quintero, Jose, Binosi, Daniele, Mezrag, Cedric, Papavassiliou, Joannis, and Roberts, Craig D. Thu . "Process-Independent Effective Coupling from QCD Green's Functions to Phenomenology". United States. doi:10.1007/s00601-018-1437-0. https://www.osti.gov/servlets/purl/1487140.
@article{osti_1487140,
title = {Process-Independent Effective Coupling from QCD Green's Functions to Phenomenology},
author = {Rodriguez-Quintero, Jose and Binosi, Daniele and Mezrag, Cedric and Papavassiliou, Joannis and Roberts, Craig D.},
abstractNote = {This article reports on a very recent proposal for a new type of process-independent QCD effective charge (Binosi et al. in Phys Rev D 96(5):054026, 2017. https://doi.org/10.1103/PhysRevD.96.054026) defined, as an anologue of the Gell-Mann-Low effective charge in QCD, on the ground of nothing but the knowledge of the gauge-field two-point Green's function, albeit modified within a particular computational framework; namely, the combination of pinch technique and background field method which makes possible a systematic rearranging of classes of diagrams in order to redefine the Green's function and have them obey linear QED-like Slavnov-Taylor identities. We have here calculated that effective charge, shown how strikingly well it compares to a process-dependent effective charge based on the Bjorken sum rule; and, finally, employed it in an exploratory calculation of the proton electromagnetic form factor in the hard scattering regime.},
doi = {10.1007/s00601-018-1437-0},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {11}
}

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