Comments on duality in MQCD

Apr, 1998
29 pages
Published in:
  • Prog.Theor.Phys. 100 (1998) 123-146
e-Print:
Report number:
  • KUNS-1502,
  • HE-TH-98-04

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Abstract:
We clarify some ambiguous points in a derivation of duality via brane exchange using M-theory language, and propose a ``proof'' of duality in MQCD. Actually, duality in MQCD is rather trivial and does not need a complicated proof. The problem is how to interpret it in field theory language. We examine BPS states in N=2 theory and find the particle correspondence under duality. In the process, we also find some exotic particles in N=2 MQCD, and we observe an interesting phenomenon in type IIA string theory, namely, that fundamental strings are converted into D2-branes via the exchange of two NS5-branes. We also discuss how we should understand Seiberg's N=1 duality from exact duality in MQCD.
Note:
  • 29 pages + 20 uuencoded eps figures, LaTeX with PTPTeXsty, typo corrected, version to appear in Prog. Theor. Phys
  • quantum chromodynamics
  • M-theory
  • duality
  • string model
  • membrane model
  • supersymmetry
  • soliton
  • space: Taub-NUT
  • gauge field theory: SU(N)
  • particle: spectrum
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