Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-11-04
Prog.Theor.Phys.115:611-624,2006
Physics
High Energy Physics
High Energy Physics - Theory
14 pages, 8 figures
Scientific paper
10.1143/PTP.115.611
We investigate the Kaluza--Klein (KK) spectrum of N=1 supersymmetric gauge theory compactified on a circle. We concentrate on a model with gauge group SU(2) and four massless matter fields in the fundamental representation. We derive the exact mass formula of KK modes by using Seiberg--Witten theory. From the mass formula and the D3-brane probe realization, we determine the spectrum of KK modes of matter fields and gauge fields. As a result, we find that the lightest KK state of gauge fields is stable for all the vacuum moduli space, while the lightest KK state of matter fields decays easier than other KK states in a region of the moduli space. The region becomes small as we decrease the five-dimensional gauge coupling constant g_5, and vanishes as we take the limit g_5->0. This result continuously connects the known KK spectrum in the weak coupling limit and that in the strong coupling limit.
Ohtake Yukiko
Wakabayashi Yuya
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