Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A determination of the average up-down, strange and charm quark masses
  from $N_f=2+1+1$   We present a lattice QCD determination of the average up-down, strange and
charm quark masses based on simulations performed by the European Twisted Mass
Collaboration with $N_f = 2 + 1 + 1$ dynamical fermions. We simulated at three
different values of the lattice spacing, the smallest being approximately
$0.06fm$, and with pion masses as small as $210 \text{MeV}$. Our results are:
$m_{ud}(2\text{GeV})=3.70(17)\text{MeV}$,
$m_s(2\text{GeV})=99.2(3.9)\text{MeV}$, $m_c(m_c)=1.350(49)\text{GeV}$,
$m_s/m_{ud}=26.64(30)$ and $m_c/m_s=11.65(12)$.

17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat