Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Open-Closed String Field Theory in the Background B-Field   In this paper, we study open-closed string field theory in the background
B-field in the so-called alpha=p^{+} formulation. The string field theory in
the infrared gives noncommutative gauge theory in the open string sector. Since
this theory includes closed string fields as dynamical variables, we can obtain
another string field theory in the same background through the condensation of
closed string fields, whose low-energy effective action does not show the
noncommutativity of spacetime. Although we have two string field theories in
the same background, we show that these theories are equivalent. In fact, we
give the unitary transformation from string fields in one of them to string
fields in the other.

18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas