Heterotic phase transitions and singularities of the gauge dyonic string
Mar, 19969 pages
Published in:
- Phys.Lett.B 378 (1996) 101-106
e-Print:
- hep-th/9603037 [hep-th]
Report number:
- CTP-TAMU-9-96
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Abstract:
Heterotic strings on generically appear to undergo some interesting new phase transition at that value of the string coupling for which the one of the six-dimensional gauge field kinetic energies changes sign. An exception is the string with equal instanton numbers in the two 's, which admits a heterotic/heterotic self-duality. In this paper, we generalize the dyonic string solution of the six-dimensional heterotic string to include non-trivial gauge field configurations corresponding to self-dual Yang-Mills instantons in the four transverse dimensions. We find that vacua which undergo a phase transition always admit a string solution exhibiting a naked singularity, whereas for vacua admitting a self-duality the solution is always regular. When there is a phase transition, there exists a choice of instanton numbers for which the dyonic string is tensionless and quasi-anti-self-dual at that critical value of the coupling. For other choices of instanton number, the string can be tensionless at different values of the coupling.Note:
- Latex, 9 pages Report-no: CTP-TAMU-9/96
- string model: heterotic
- gauge field theory: E(8) x E(8)
- dimension: >4
- critical phenomena
- dyon
- supergravity
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