Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-06-12
Phys.Rev.D56:7978-7989,1997
Physics
High Energy Physics
High Energy Physics - Theory
26 pages, Latex, several misprints corrected, final version to be published in Phys.Rev. D
Scientific paper
10.1103/PhysRevD.56.7978
We present a detailed analysis of the domain walls in supersymmetric gluodynamics and SQCD. We use the (corrected) Veneziano-Yankielowicz effective Lagrangians to explicitely obtain the wall profiles and check recent results of Dvali and Shifman (Phys. Lett. B396, (1997) 64: (i) the BPS-saturated nature of the walls; (ii) the exact expressions for the wall energy density which depend only on global features of dynamics (the existence of a non-trivial central extension of N=1 superalgebra in the theories which admit wall-like solutions). If supersymmetry is softly broken by the gluino mass, the degeneracy of the distinct vacua is gone, and one can consider the decay rate of the "false" vacuum into the genuine one. We do this calculation in the limit of the small gluino mass. Finally, we comment on the controversy regarding the existence of $N$ distinct chirally asymmetric vacua in SU(N) SUSY gluodynamics.
Kovner Alex
Shifman Michael
Smilga Andrei
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