Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New $\tau$-based evaluation of the hadronic contribution to the vacuum
  polarization piece of the muon anomalous magnetic moment   We revisit the isospin-breaking and electromagnetic corrections to the decay
$\tau^-\to\pi^-\pi^0\nu_\tau$, which allow its use as input in the two-pion
contribution to the (leading order) hadronic vacuum polarization part of the
muon anomalous magnetic moment. We extend a previous resonance chiral
Lagrangian analysis, which included those operators saturating the
next-to-leading order chiral low energy constants, by including the
contributions of the next subleading terms. As a result, we improve agreement
between the two-pion tau decay and $e^+e^-$ data and reduce the discrepancy
between experiment and the SM prediction of $a_\mu$ (using $\tau$ input).

37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat