Colliding singularities in Ftheory and phase transitions
Abstract
We study Ftheory on elliptic CalabiYau threefolds near colliding singularities. We demonstrate that resolutions of those singularities generically correspond to transitions to phases characterized by new tensor multiplets and enhanced gauge symmetry. These are governed by the dynamics of tensionless strings. We also find new transition points which are associated with several small instantons simultaneously shrinking to zero size.
 Publication:

Nuclear Physics B
 Pub Date:
 February 1997
 DOI:
 10.1016/S05503213(97)000278
 arXiv:
 arXiv:hepth/9610111
 Bibcode:
 1997NuPhB.489..122B
 Keywords:

 High Energy Physics  Theory
 EPrint:
 harvmac tex, 19 pages, minor misprints are corrected, the section on SO(*)xSO(*) is extended, the discussion on small instantons is added