Fermion correction to the mass of the scalar glueball in QCD sum rule
Xu-Hao Yuan, Liang Tang
TL;DR
This paper calculates how fermion contributions at two-loop level affect the scalar glueball mass in QCD sum rules, showing that fermions alter the OPE coefficients and shift the predicted glueball mass.
Contribution
It provides a detailed two-loop calculation of fermion effects on the scalar glueball mass within the QCD sum rule framework, which was not previously done.
Findings
Fermion contributions modify the OPE coefficients.
Fermions cause a shift in the scalar glueball mass.
The results improve the understanding of non-perturbative effects in QCD.
Abstract
Contributions of fermions to the mass of the scalar glueball are calculated at two-loop level in the framework of QCD sum rules. It obviously changes the coefficients in the operator product expansion (OPE) and shifts the mass of glueball.
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