Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Brane world: disappearing massive matter   In a brane (domain wall) scenario with an infinite extra dimension and
localized gravity, bulk fermions and scalars often have bound states with zero
4-dimensional mass. In this way massless matter residing on the brane may be
obtained. We consider what happens when one tries to introduce small, but
non-vanishing mass to these matter fields. We find that the discrete zero modes
turn into quasi-localized states with finite 4-dimensional mass and finite
width. The latter is due to tunneling of massive matter into extra dimension.
We argue that this phenomenon is generic to fields that can have bulk modes. We
also point out that in theories meant to describe massive scalars, the
4-dimensional scalar potential has, in fact, power-law behavior at large
distances.

30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc