On six dimensional "gauge" theories with irrational theta angle

Barak Kol*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A recent proposal for 6d "gauge" theories with rational theta angle is discussed. These theories were constructed from nC coinciding (p, q) 5-branes of IIB in the limit of vanishing string constant. They have (1,1) supersymmetry and the low energy theory is 6d Yang-Mills with gauge group SU(nc) and a rational theta angle θ6/2π = f/q, where fp = 1 (mod q). By changing the point of view, considering the (p, q) 5-branes to be D5-branes, the 6d theta angle is identified with a 10d theta angle. This point of view together with some assumptions suggests a generalization of the previous limit to arbitrary theta. This limit seems to define a decoupled 6d theory even though the 10d theory does not become free in general.

Original languageAmerican English
Pages (from-to)XXVII-5
JournalJournal of High Energy Physics
Issue number11
StatePublished - 1999
Externally publishedYes


  • Brane Dynamics in Gauge Theories
  • Field Theories in Higher Dimensions


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