Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Oscillations of Faster than Light Majorana Neutrinos: A Causal Field
  Theory   In this paper, we carry out the canonical quantization of the field theory of
an interacting tachyonic Majorana neutrino. We show how micro-causality is
preserved in the physical scattering matrix elements between the in and out
vacua.
  The phenomenology of this radical proposal is nevertheless compatible with
normal timelike oscillations.

30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th