Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Seesaw, coherence and neutrino oscillations   We present a prescription for consistently constructing non-Fock coherent
flavour neutrino states within the framework of the seesaw mechanism, and
establish that the physical vacuum of massive neutrinos is a condensate of
Standard Model massless neutrino states. The coherent states, involving a
finite number of massive states, are derived by constructing their creation
operator. Such a construction is the key requirement so that the oscillations
of particles indeed occur. We comment on the inherent non-unitarity of the
oscillation probability induced by the requirement of coherence.

25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex