Spacetime supersymmetry in a nontrivial Neveu-Schwarz–Neveu-Schwarz superstring background
نویسندگان
چکیده
منابع مشابه
Spacetime Supersymmetry in a Nontrivial Ns-ns Superstring Background
In this paper we consider superstring propagation in a nontrivial NS-NS background. We deform the world sheet stress tensor and supercurrent with an infinitesimal Bμν field. We construct the gauge-covariant super-Poincaré generators in this background and show that the Bμν field spontaneously breaks spacetime supersymmetry. We find that the gauge-covariant spacetime momenta cease to commute wit...
متن کاملSuperstring Gravitational Wave Backgrounds with Spacetime Supersymmetry
We analyse the stringy gravitational wave background based on the current algebra E 2. We determine its exact spectrum and construct the modular invariant vacuum energy. The corresponding N=1 extension is also constructed. The algebra is again mapped to free bosons and fermions and we show that this background has N=4 (N=2) unbroken spacetime supersymmetry in the type II (heterotic case). CERN-...
متن کاملThe Ten-dimensional Green-schwarz Superstring Is a Twisted Neveu-schwarz-ramond String
An action for the ten-dimensional Green-Schwarz superstring with N=2 worldsheet superconformal invariance has recently been used to calculate superstring scattering amplitudes and prove their finiteness. In this paper, it is shown that the N=2 stress-energy tensor for this Green-Schwarz action can be constructed out of the stress-energy tensor and ghosts of the Neveu-Schwarz-Ramond action by th...
متن کاملRotational Perturbations in Neveu-Schwarz–Neveu-Schwarz String Cosmology
First order rotational perturbations of the flat Friedmann-Robertson-Walker (FRW) metric are considered in the framework of four dimensional Neveu-Schwarz–Neveu-Schwarz (NS-NS) string cosmological models coupled with dilaton and axion fields. The decay rate of rotation depends mainly upon the dilaton field potential U . The equation for rotation imposes strong limitations upon the functional fo...
متن کاملAnisotropic four-dimensional Neveu-Schwarz–Neveu-Schwarz string cosmology
An anisotropic ~Bianchi type I! cosmology is considered in the four-dimensional Neveu-Schwarz–NeveuSchwarz ~NS–NS! sector of low-energy effective string theory coupled to a dilaton and an axionlike H field within a de Sitter–Einstein frame background. The general solution of the gravitational field equations can be expressed in an exact parametric form in both Einstein and string frames. The st...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2002
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.65.046002