https://doi.org/10.1140/epjc/s10052-019-7395-y
Regular Article - Theoretical Physics
Large
scaling of meson masses and decay constants
1
IFIC (CSIC-UVEG), Edificio Institutos Investigación, Apt. 22085, 46071, Valencia, Spain
2
Departamento de Física Teórica and Instituto de Física Teórica UAM-CSIC, Universidad Autónoma de Madrid, 28049, Madrid, Spain
* e-mail: fernando.romero@uv.es
Received:
13
August
2019
Accepted:
11
October
2019
Published online:
22
October
2019
We perform an ab initio calculation of the scaling of the low-energy couplings of the chiral Lagrangian of low-energy strong interactions, extracted from the mass dependence of meson masses and decay constants. We compute these observables on the lattice with four degenerate fermions,
, and varying number of colours,
–6, at a lattice spacing of
fm. We find good agreement with the expected
scaling and measure the coefficients of the leading and subleading terms in the large
expansion. From the subleading
corrections, we can also infer the
dependence, that we use to extract the value of the low-energy couplings for different values of
. We find agreement with previous determinations at
and
and also, our results support a strong paramagnetic suppression of the chiral condensate in moving from
to
.
© The Author(s), 2019