Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron renormalization of sound interaction with two-level systems in
  superconducting metglasses   The crossing of temperature dependences of the sound velocity in normal and
superconducting state of metallic glasses points out unambiguously the
renormalization of the intensity of sound interaction with two-level systems
(TLS), caused by their coupling with electrons. We propose a simple scenario
which allows us to describe qualitatively the influence of the superconducting
transition on the sound velocity and attenuation in superconducting metglasses
and to make quantative estimations of renormalization parameters.

10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph