Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charmed and light pseudoscalar meson decay constants from HISQ
  simulations   We compute the leptonic decay constants $f_{D^+}$, $f_{D_s}$, and $f_{K^+}$,
and the quark-mass ratios $m_c/m_s$ and $m_s/m_l$ in unquenched lattice QCD. We
use the MILC highly improved staggered quark (HISQ) ensembles with four
dynamical quark flavors. Our primary results are $f_{D^+} =
212.6(0.4)({}^{+1.0}_{-1.2})\ \mathrm{MeV}$, $f_{D_s} =
249.0(0.3)({}^{+1.1}_{-1.5})\ \mathrm{MeV}$, and $f_{D_s}/f_{D^+} =
1.1712(10)({}^{+29}_{-32})$, where the errors are statistical and total
systematic, respectively. We also obtain $f_{K^+}/f_{\pi^+} =
1.1956(10)({}^{+26}_{-18})$, updating our previous result, and determine the
quark-mass ratios $m_s/m_l = 27.35(5)({}^{+10}_{-7})$ and $m_c/m_s =
11.747(19)({}^{+59}_{-43})$. When combined with experimental measurements of
the decay rates, our results lead to precise determinations of the CKM matrix
elements $|V_{us}| = 0.22487(51) (29)(20)(5)$, $|V_{cd}|=0.217(1) (5)(1)$ and
$|V_{cs}|= 1.010(5)(18)(6)$, where the errors are from this calculation of the
decay constants, the uncertainty in the experimental decay rates,
structure-dependent electromagnetic corrections, and, in the case of
$|V_{us}|$, the uncertainty in $|V_{ud}|$, respectively.

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The categories of this paper are: comp-gas
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: cs
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: quant-ph