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A bstractA calculation of the pion mass and decay constant at NNNLO in two-flavour chiral perturbation theory is presented. The results are cross-checked by using both the exponential and square… Click to show full abstract
A bstractA calculation of the pion mass and decay constant at NNNLO in two-flavour chiral perturbation theory is presented. The results are cross-checked by using both the exponential and square root parametrizations of the Goldstone matrix field, as well as by comparing to the known leading log coefficients of the two quantities. A small numerical study of the quark mass dependence is performed, and for a physical quark mass there is good agreement with lower order results.
Keywords:
flavour chiral;
decay constant;
two flavour;
mass;
pion mass;
mass decay
Journal Title: Journal of High Energy Physics
Year Published: 2017
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Journal Title: Journal of High Energy Physics
Year Published: 2017
Link to full text (if available)
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recommendations!