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Title: Quark fragmentation as a probe of dynamical mass generation

Abstract

We address the propagation and hadronization of a struck quark by studying the gauge invariance of the color-averaged cut quark propagator, and by relating this to the single inclusive quark fragmentation correlator by means of new sum rules. Using suitable Wilson lines, we provide a gauge-invariant definition for the mass of the color-averaged dressed quark and decompose this into the sum of a current and an interaction-dependent component. The latter, which we argue is an order parameter for dynamical chiral symmetry breaking, also appears in the sum rule for the twist-3 $$\tilde{E}$$ fragmentation function, providing a direct experimental way to probe the dynamical generation of mass in Quantum Chromo Dynamics.

Authors:
ORCiD logo [1]; ORCiD logo [2]
  1. Hampton Univ., Hampton, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States); Università di Pavia (Italy); Istituto Nazionale di Fisica Nucleare (INFN), Pavia (Italy); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Hampton Univ., Hampton, VA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1569098
Alternate Identifier(s):
OSTI ID: 1570342
Report Number(s):
JLAB-THY-19-2900; DOE/OR/23177-4650; arXiv:1903.04458
Journal ID: ISSN 0370-2693
Grant/Contract Number:  
AC05-06OR23177; SC0008791; AC02-06CH11357; 795475
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Volume: 798; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Quarks; Hadronization; Fragmentation functions; Mass; Chiral symmetry; QCD

Citation Formats

Accardi, Alberto, and Signori, Andrea. Quark fragmentation as a probe of dynamical mass generation. United States: N. p., 2019. Web. doi:10.1016/j.physletb.2019.134993.
Accardi, Alberto, & Signori, Andrea. Quark fragmentation as a probe of dynamical mass generation. United States. doi:10.1016/j.physletb.2019.134993.
Accardi, Alberto, and Signori, Andrea. Thu . "Quark fragmentation as a probe of dynamical mass generation". United States. doi:10.1016/j.physletb.2019.134993.
@article{osti_1569098,
title = {Quark fragmentation as a probe of dynamical mass generation},
author = {Accardi, Alberto and Signori, Andrea},
abstractNote = {We address the propagation and hadronization of a struck quark by studying the gauge invariance of the color-averaged cut quark propagator, and by relating this to the single inclusive quark fragmentation correlator by means of new sum rules. Using suitable Wilson lines, we provide a gauge-invariant definition for the mass of the color-averaged dressed quark and decompose this into the sum of a current and an interaction-dependent component. The latter, which we argue is an order parameter for dynamical chiral symmetry breaking, also appears in the sum rule for the twist-3 $\tilde{E}$ fragmentation function, providing a direct experimental way to probe the dynamical generation of mass in Quantum Chromo Dynamics.},
doi = {10.1016/j.physletb.2019.134993},
journal = {Physics Letters B},
number = C,
volume = 798,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2019.134993

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