Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for T-violation in K^+ --> pi^0 mu^+ nu and K^+ --> mu^+ nu gamma
  Decays   The recent progress in search for T-violating transverse muon polarization in
the decays K^+ --> pi^0 mu^+ nu and K^+ --> mu^+ nu gamma in the on-going
experiment E246 at KEK is reported. Future prospects in polarization
measurements are also discussed.

16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph