Abstract

A procedure for computing the dimensions of the moduli spaces of reducible, holomorphic vector bundles on elliptically fibered Calabi-Yau threefolds X is presented. This procedure is applied to poly-stable rank n+m bundles of the form V + pi* M, where V is a stable vector bundle with structure group SU(n) on X and M is a stable vector bundle with structure group SU(m) on the base surface B of X. Such bundles arise from small instanton transitions involving five-branes wrapped on fibers of the elliptic fibration. The structure and physical meaning of these transitions are discussed.

Publication Type:	Article
Additional Information:	The original publication is available at http://iopscience.iop.org/1126-6708/2004/03/043/ archiveprefix: arXiv primaryclass: hep-th
Publisher Keywords:	superstrings and heterotic strings, M-theory, superstring vacua
Subjects:	Q Science > QC Physics
Departments:	School of Mathematics, Computer Science & Engineering > Mathematics
URI:	http://openaccess.city.ac.uk/id/eprint/844

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