String theory, misaligned supersymmetry, and the supertrace constraints
Feb, 19959 pages
Published in:
- Phys.Rev.Lett. 74 (1995) 4767-4770
e-Print:
- hep-th/9503055 [hep-th]
Report number:
- IASSNS-HEP-95-12
Citations per year
Abstract: (DESY)
We demonstrate that string consistency in four spacetime dimensions leads to a spectrum of string states which satisfies the supertrace constraints Str(M~0)=0 and Str(M~2)=\Lambda at tree level, where \Lambda is the one-loop string cosmological constant. This result holds for a large class of string theories, including critical heterotic strings. For strings lacking spacetime supersymmetry, these supertrace constraints will be satisfied as a consequence of a hidden ``misaligned supersymmetry'' in the string spectrum. These results thus severely constrain the possible supersymmetry-breaking scenarios in string theory, and suggest a new intrinsically stringy mechanism whereby such supertrace constraints may be satisfied without phenomenologically unacceptable consequences.- string model
- supersymmetry
- phase space
- constraint
- cosmological constant
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