Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Challenging Lorentz noninvariant neutrino oscillations without neutrino
  masses   We show that the combined data from solar, long-baseline and reactor neutrino
experiments can exclude the generalized bicycle model of Lorentz noninvariant
direction-dependent and/or direction-independent oscillations of massless
neutrinos. This model has five parameters, which is more than is needed in
standard oscillation phenomenology with neutrino masses. Solar data alone are
sufficient to exclude the pure direction-dependent case. The combination of
solar and long-baseline data rules out the pure direction-independent case.
With the addition of KamLAND data, a mixture of direction-dependent and
direction-independent terms in the effective Hamiltonian is also excluded.

28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph