Cosmic supergravity
نویسندگان
چکیده
منابع مشابه
Cosmic Strings in Supergravity
It is pointed out that various types of cosmic string solutions that exist in nonsupersymmetric and globally supersymmetric theories, such as D-type gauge strings, F-type global and gauge strings, and superconducting Witten strings, also exist in supergravity models. When the D term and superpotential satisfy some simple conditions allowing the determination of a set of vacuum states with nontr...
متن کاملFermionic Zero Modes of Supergravity Cosmic Strings
Recent developments in string theory suggest that cosmic strings could be formed at the end of brane inflation. Supergravity provides a realistic model to study the properties of strings arising in brane inflation. Whilst the properties of cosmic strings in flat space-time have been extensively studied there are significant complications in the presence of gravity. We study the effects of gravi...
متن کاملCosmic Strings from N= 2, D= 5 Supergravity
Exact solutions of N=2 supergravity in five dimensions are found in the metric with cylindrical symmetry, a particular case corresponds to the exterior of a cosmic string. PACS: 04.40,04.65 To appear in Modern Physics Letters A ∗E-mail: [email protected] 1
متن کاملHiding cosmic strings in supergravity D-term inflation
Abstract The influence of higher-order terms in the Kähler potential of the supergravity D-term inflation model on the density perturbation is studied. We show that these terms can make the inflaton potential flatter, which lowers the energy scale of inflation under the COBE/WMAP normalization. As a result, the mass per unit length of cosmic strings, which are produced at the end of inflation, ...
متن کاملMagnetic Cosmic Strings of N = 1 , D = 4 Supergravity with Cosmological Constant
We find a new class of cosmic string solutions with non-vanishing magnetic flux of N = 1, D = 4 supergravity with a cosmological constant and coupled to any number of Maxwell and scalar multiplets. We show that these magnetic cosmic string solutions preserve 1/2 of supersymmetry. We give an explicit example of such a solution for which the complex scalars are constant and the spacetime is smoot...
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: Nuclear Physics B
سال: 1985
ISSN: 0550-3213
DOI: 10.1016/0550-3213(85)90444-4