Gauge five-brane dynamics and small instanton transitions in heterotic models
Dec, 200315 pages
Published in:
- Phys.Rev.D 69 (2004) 126003
e-Print:
- hep-th/0312111 [hep-th]
Report number:
- DCPT-03-59
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Abstract:
We present the first examples of cosmological solutions to four-dimensional heterotic models which include an evolving bundle modulus. The particular bundle modulus we consider corresponds to the width of a gauge five brane. As such our solutions can be used to describe the evolution in one of these models after a small instanton transition. We find that certain properties are generic to these solutions, regardless of initial conditions. This enables us to make some definite statements about the dynamics subsequent to a small instanton transition despite the fact that we cannot microscopically describe the process itself. We also show that an effective description of the small instanton transition by a continuous matching of fields and their first derivatives is precluded by the form of the respective low-energy theories before and after the transition.- 11.25.Mj
- M-theory: heterotic
- effective action
- membrane model: p-brane
- p-brane: 5
- field equations: solution
- fibre bundle
- instanton: transition
- numerical calculations
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