Friday, July 28, 2023, 11:00 am — Large Seminar Room, Bldg. 510
Abstract: The mesonic f_PS / m_V and f_V / m_V ratios, with f the decay constant and
the m meson mass, are calculated in mass perturbed conformal gauge
theories to NNLO and N^3LO orders, respectively. Here NNLO and N^3LO refer
to the non-relativistic effective theory expansion which is the applicable
framework. The results are expanded a la Banks-Zaks in order to end up
with scheme-independent predictions. These perturbative results are
unambiguously reliable close to the upper end of the conformal window, N_f
= 16.5 and it is shown that they might be reliable down to = 12. An
attempt is made to match these to previous non-perturbative lattice
results in the range 1
Hosted by: Yoshitaka Hatta
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