Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic Superluminal Neutrinos   We present a possible solution to the reported OPERA anomaly for the speed of
neutrinos, based on the idea that it is a local effect caused by a scalar field
sourced by the earth. The coupling of the scalar to neutrinos effectively
changes the background metric where neutrinos propagate, leading to
superluminality. The strength of the coupling is set by a new mass scale, which
should be at $1\, {\rm TeV}$ to account for the OPERA anomaly. Moreover, if
this scenario is valid, the neutrino velocity depends on the baseline distance
between the emission and detection points in such a way that superluminal
signals turn to subluminal ones for baseline distances roughly larger than the
earth radius.

15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin