Relativistic theory of string breaking in QCD
Yu. A. Simonov, ITEP (Moscow)
TL;DR
This paper develops a relativistic, nonperturbative theory of string breaking in QCD, focusing on quark pair creation and its dependence on light quark mass and flavor, aligning with experimental observations.
Contribution
It introduces a relativistic, nonperturbative framework for QCD string breaking, explicitly calculating the scalar pair creation vertex and its relation to chiral symmetry breaking.
Findings
Scalar pair creation vertex matches the $^3P_0$ model
Dependence on light quark mass and flavor is characterized
Good agreement with experimental data
Abstract
The QCD string breaking due to quark pair creation in the vacuum confining field, possibly accompanied by vector, scalar or Nambu-Goldstone bosons, is studied nonperturbatively. The scalar light pair creation vertex occurs due to chiral symmetry breaking and has a confining form, which is computed explicitly together with subleading vector contributions. Dependence on light quark mass and flavor is specifically studied. The dominant scalar term is in good agreement with the model and experimental data.
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