Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two particle-two hole final states in quasi elastic neutrino-nucleus
  interactions   The excitation of two particle-two hole final states in neutrino-nucleus
scattering, not taken into account in Monte Carlo simulations for data
analysis, has been advocated by many authors as the source of the excess cross
section observed by the MiniBooNE collaboration in the quasi elastic channel.
We analyse the mechanisms leading to the appearance of two particle-two hole
states, and show that interference between the amplitudes involving one- and
two-nucleon currents, not consistently included in existing calculations, plays
a major role. A novel approach allowing to treat one- and two-nucleon current
contributions on the same footing is outlined.

8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex