Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Brane Supersymmetry Breaking and the Cosmological Constant: Open
  Problems   It has recently been argued that non--BPS brane world scenarios can reproduce
the small value of the cosmological constant that seems to have been measured.
Objections against this proposal are discussed and necessary (but not
sufficient) conditions are stated under which it may work. At least n=2 extra
dimensions are needed. Also, the mass matrix in the supergravity sector must
satisfy $Str M^2=0$. Moreover, the proposal can be ruled out experimentally if
Newton's constant remains unchanged down to scales of 10 micrometers. If, on
the other hand, such a ``running Newton constant'' is observed, it could
provide crucial experimental input for superstring phenomenology.

16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
18
The categories of this paper are: econ
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex