The CremmerScherk mechanism in Ftheory compactifications on K3 manifolds
Abstract
It is well understood — through string dualities — that there are 20 massless vector fields in the spectrum of eightdimensional Ftheory compactifications on smooth elliptically fibered K3 surfaces at a generic point in the K3 moduli space. Such Ftheory vacua, which do not have any enhanced gauge symmetries, can be thought of as supersymmetric type IIB compactifications on ^{1} with 24 ( p, q) sevenbranes. Naively, one might expect there to be 24 massless vector fields in the eightdimensional effective theory coming from worldvolume gauge fields of the 24 branes. In this paper, we show how the vector field spectrum of the eightdimensional effective theory can be obtained from the point of view of type IIB supergravity coupled to the worldvolume theory of the sevenbranes. In particular, we first show that the twoforms of the type IIB theory absorb the sevenbrane worldvolume gauge fields via the CremmerScherk mechanism. We then proceed to show that the massless vector fields of the eightdimensional theory come from KKreducing the SL(2 , ) doublet twoforms of type IIB theory along SL(2 , ) doublet oneforms on the ^{1}. We also discuss the relation between these vector fields and the "eaten" worldvolume vector fields of the sevenbranes.
 Publication:

Journal of High Energy Physics
 Pub Date:
 May 2014
 DOI:
 10.1007/JHEP05(2014)135
 arXiv:
 arXiv:1403.1595
 Bibcode:
 2014JHEP...05..135D
 Keywords:

 FTheory;
 Superstring Vacua;
 pbranes;
 High Energy Physics  Theory
 EPrint:
 33 pages + appendices, 5 figures