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Gauge invariant spectral analysis of quark hadronization dynamics

Articolo
Data di Pubblicazione:
2023
Abstract:
We study the Dirac decomposition of the gauge-invariant quark propagator, whose imaginary part describes the hadronization of a quark as this interacts with the vacuum, and relate each of its coefficients to a specific sum rule for the chiral-odd and chiral-even quark spectral functions. Working at first in lightlike axial gauge, we obtain a new sum rule for the spectral function associated with the gauge-fixing vector and show that its second moment is, in fact, equal to zero. Then, we demonstrate that the first moment of the chiral-odd quark spectral function is equal in any gauge to the so-called inclusive jet mass, which is related to the mass of the particles produced in the hadronization of a quark. Finally, we present a gauge-dependent formula that connects the second moment of the chiral-even quark spectral function to invariant mass generation and final state rescattering in the hadronization of a quark.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
QCD, confinement, quark propagation and hadronization, gauge invariance, dynamical mass generation
Elenco autori:
Alberto Accardi; Caroline S.???R. Costa; Andrea Signori
Autori di Ateneo:
SIGNORI Andrea
Link alla scheda completa:
https://iris.unito.it/handle/2318/1949420
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/1949420/1222246/PhysRevD.108.114011.pdf
Pubblicato in:
PHYSICAL REVIEW D
Journal
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Dati Generali

URL

https://journals.aps.org/prd/pdf/10.1103/PhysRevD.108.114011

Aree Di Ricerca

Settori (5)


PE2_2 - Phenomenology of fundamental interactions - (2022)

PE2_6 - Nuclear, hadron and heavy ion physics - (2022)

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Cosmologia e Universo

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Fisica delle Particelle e dei Nuclei

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Laboratori innovativi, strumentazione e modellizzazione fisica
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