Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improved $K_{e3}$ radiative corrections sharpen the $K_{\mu
  2}$--$K_{l3}$ discrepancy   The measurements of $V_{us}$ in leptonic $(K_{\mu 2})$ and semileptonic
$(K_{l3})$ kaon decays exhibit a $3\sigma$ disagreement, which could originate
either from physics beyond the Standard Model or some large unidentified
Standard Model systematic effects. Clarifying this issue requires a careful
examination of all existing Standard Model inputs. Making use of a
newly-proposed computational framework and the most recent lattice QCD results,
we perform a comprehensive re-analysis of the electroweak radiative corrections
to the $K_{e3}$ decay rates that achieves an unprecedented level of precision
of $10^{-4}$, which improves the current best results by almost an order of
magnitude. No large systematic effects are found, which suggests that the
electroweak radiative corrections should be removed from the ``list of
culprits'' responsible for the $K_{\mu 2}$--$K_{l3}$ discrepancy.

31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph