Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Cremmer-Scherk Mechanism in F-theory Compactifications on K3
  Manifolds   It is well understood --- through string dualities --- that there are 20
massless vector fields in the spectrum of eight-dimensional F-theory
compactifications on smooth elliptically fibered K3 surfaces at a generic point
in the K3 moduli space. Such F-theory vacua, which do not have any enhanced
gauge symmetries, can be thought of as supersymmetric type IIB
compactifications on P1 with 24 (p,q) seven-branes. Naively, one might expect
there to be 24 massless vector fields in the eight-dimensional effective theory
coming from world-volume gauge fields of the 24 branes. In this paper, we show
how the vector field spectrum of the eight-dimensional effective theory can be
obtained from the point of view of type IIB supergravity coupled to the
world-volume theory of the seven-branes. In particular, we first show that the
two-forms of the type IIB theory absorb the seven-brane world-volume gauge
fields via the Cremmer-Scherk mechanism. We then proceed to show that the
massless vector fields of the eight-dimensional theory come from KK-reducing
the SL(2,Z) doublet two-forms of type IIB theory along SL(2,Z) doublet
one-forms on the P1. We also discuss the relation between these vector fields
and the "eaten" world-volume vector fields of the seven-branes.

16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph