Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: tau physics at B-factories   Today the B-factories BaBar and Belle have accumulated largest samples of
tau-tau events and are competing to be called tau-factories. Among the problems
to be tested and measurements to be done by BaBar and Belle are check of CP and
CPT invariance in tau decays, measurement of strange and non-strange spectral
functions, extraction of mass of strange quark and |V_us|, searches for lepton
flavor violation processes. In this paper, the latest results in tau physics by
these two experiments and measurements to be done within next few years are
reviewed.

16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math