Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The quest for $\mu \to e \gamma$: present and future   The quest for $\mu \to e \gamma$ is one of the most important endeavors to
search for New Physics beyond the Standard Model. In this talk I will review
the current status of the experimental searches by the MEG Collaboration at
PSI. I will also present a study of the experimental limiting factors that will
define the ultimate performances, and hence the sensitivity, in the search for
$\mu \to e \gamma$ with continuous muon beams of extremely high rate (one or
even two orders of magnitude larger than the present beams), whose construction
is under consideration for the next decade.

37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat