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Title Quark fragmentation as a probe of dynamical mass generation
Authors Alberto Accardi,Andrea Signori
JLAB number JLAB-THY-19-2900
LANL number arXiv:1903.04458
Other number DOE/OR/23177-4650
Document Type(s) (Journal Article) 
Supported by U.S. Naval Research: No
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)
Other Funding:AC02-06CH11357

Compiled for Physics Letters B
Volume 798
Page(s) 134993
Publication 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 E_tilde fragmentation function, providing a direct experimental way to probe the dynamical generation of mass in Quantum Chromo Dynamics.
Experiment Numbers: other
Document: pdf
Accepted Manuscript: 1-s2.0-S0370269319307154-main.pdf
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