Moduli and Kaehler potential in fermionic strings

Journal Article · Thu Sep 15 04:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.4060· OSTI ID:7197785

Lopez, J L ^[1]; Nanopoulos, D V ^[2]; Yuan, K ^[1]

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1. Center for Theoretical Physics, Department of Physics, Texas A M University, College Station, Texas 77843-4242 (United States) Astroparticle Physics Group, Houston Advanced Research Center (HARC), The Woodlands, Texas 77381 (United States)
2. Center for Theoretical Physics, Department of Physics, Texas A M University, College Station, Texas 77843-4242 (United States) Astroparticle Physics Group, Houston Advanced Research Center (HARC), The Woodlands, Texas 77381 (United States) CERN Theory Division, 1211 Geneva 23 (Switzerland)

We study the problem of identifying the moduli fields in fermionic four-dimensional string models. We deform a free-fermionic model by introducing exactly marginal operators in the form of Abelian Thirring interactions on the world sheet, and show that their couplings correspond to the untwisted moduli fields. We study the consequences of this method for simple free-fermionic models which correspond to [ital Z][sub 2][times][ital Z][sub 2] orbifolds and obtain their moduli space and Kaehler potential by symmetry arguments and by direct calculation of string scattering amplitudes. We then generalize our analysis to more complicated fermionic structures which arise in constructions of realistic models corresponding to asymmetric orbifolds, and obtain the moduli space and Kaehler potential for this case. Finally we extend our analysis to the untwisted matter sector and derive expressions for the full Kaehler potential to be used in phenomenological applications, and the target space duality transformations of the corresponding untwisted matter fields.

• DOE Contract Number: FG05-91ER40633
• OSTI ID: 7197785
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:6; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

661310 -- Relativity & Gravitation-- (1992-)
662110* -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
COMPOSITE MODELS
COUPLING
DUALITY
EXTENDED PARTICLE MODEL
FERMIONS
FOUR-DIMENSIONAL CALCULATIONS
MATHEMATICAL MODELS
PARTICLE MODELS
POTENTIALS
QUARK MODEL
SCATTERING AMPLITUDES
STRING MODELS
SYMMETRY