Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Apparent Superluminal Muon-neutrino Velocity as a Manifestation of Weak
  Value   The result of the OPERA experiment revealed that the velocity of
muon-neutrinos was larger than the speed of light. We argue that this apparent
superluminal velocity can be interpreted as a weak value, which is a new
concept recently studied in the context of quantum physics. The OPERA
experiment setup forms a scheme that manifests the neutrino velocity as a weak
value. The velocity defined in the scheme of weak measurement can exceed the
speed of light. The weak velocity is not a concept associated to a single
phenomenon but it is a statistical concept defined by accumulating data at
separated places and by comparing the data. Neither information nor physical
influence is conveyed at the weak velocity. Thus the superluminal velocity in
the sense of weak value does not contradict the causality law. We propose also
a model for calculating the neutrino velocity with taking neutrino oscillation
into account.

2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat