Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards New Frontiers with $B\to\pi K$ Decays   Exploring correlations between the CP asymmetries of $B^0_d\to\pi^0K_{\rm S}$
following from an isospin relation, we uncover new tensions with the Standard
Model in data for neutral $B\to\pi K$ decays. Should this intriguing picture
originate from New Physics, a modified electroweak penguin sector provides a
key scenario. It includes models with extra $Z'$ bosons, which offer attractive
ways to resolve anomalies in $B\to K^{(*)}\ell^+\ell^-$ measurements. We
present a new strategy to reveal the underlying physics, apply it to current
$B\to\pi K$ data, and discuss the excellent prospects for Belle II.

24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th