Radius stabilization and anomaly mediated supersymmetry breaking
Oct, 199920 pages
Published in:
- Phys.Rev.D 62 (2000) 035008
e-Print:
- hep-th/9910202 [hep-th]
Report number:
- NSF-ITP-99-115,
- SU-ITP-99-44,
- UMD-PP-00-031
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Abstract:
We analyze in detail a specific 5-dimensional realization of a "brane-universe" scenario where the visible and hidden sectors are localized on spatially separated 3-branes coupled only by supergravity, with supersymmetry breaking originating in the hidden sector. Although general power counting allows order 1/M_{Planck}^2 contact terms between the two sectors in the 4-dimensional theory from exchange of supergravity Kaluza-Klein modes, we show that they are not present by carefully matching to the 5-dimensional theory. We also find that the radius modulus corresponding to the size of the compactified dimension must be stabilized by additional dynamics in order to avoid run-away behavior after supersymmetry breaking and to understand the communication of supersymmetry breaking. We stabilize the radius by adding two pure Yang--Mills sectors, one in the bulk and the other localized on a brane. Gaugino condensation in the 4-dimensional effective theory generates a superpotential that can naturally fix the radius at a sufficiently large value that supersymmetry breaking is communicated dominantly by the recently-discovered mechanism of anomaly mediation. The mass of the radius modulus is large compared to m_{3/2}. The stabilization mechanism requires only parameters of order one at the fundamental scale, with no fine-tuning except for the cosmological constant.- supergravity
- supersymmetry: symmetry breaking
- dimension: 5
- compactification
- dimension: 4
- gauge field theory: SU(N)
- Kaluza-Klein model
- anomaly
- stability
- membrane model: p-brane
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