Results 131 to 140 of about 21,399,211 (273)

Stable de Sitter vacua in N=2, D=5 supergravity

, 2005
We find 5D gauged supergravity theories exhibiting stable de Sitter vacua. These are the first examples of stable de Sitter vacua in higher-dimensional (D>4) supergravity.
Balasubramanian V, Balasubramanian V, Bergshoeff E, Bert Cosemans, Burgess C P, D'Auria R, de Roo M, de Roo M, de Wit B, Denef F, Ellis J, Escoda C, Fré P, Fré P, Geert Smet, Gibbons G W Hull C M, Günaydin M, Hull C M, Hull C M, Kallosh R, Klemm D, Maldacena J, Maloney A Silverstein E Strominger A, McReynolds S, Saltman A, Saltman A Silverstein E, Strominger A, Strominger A, Warner N, Witten E, Witten E   +30 more
core   +1 more source

Supersymmetric E_{8(+8)} / SO(16) Sigma-Model Coupled to N=1 Supergravity in Three-Dimensions [PDF]

, 2002
A three-dimensional simple N=1 supergravity theory with a supersymmetric sigma-model on the coset E_{8(+8)} / SO(16) is constructed. Both bosons and fermions in the matter multiplets are in the spinorial 128-representation of SO(16) with the same ...
Nishino, Hitoshi, Rajpoot, Subhash
core   +1 more source

On Calabi‐Yau Manifolds at Strong Topological String Coupling

Fortschritte der Physik, Volume 72, Issue 12, December 2024.
Abstract It was recently shown that integrating out M2 states on Calabi‐Yau manifolds captures non‐perturbative topological string physics in the free energy. In this note, It has been shown that the resulting expression manifests a certain duality symmetry: the free energy at strong string coupling is equal to the Calabi‐Yau period at weak string ...
Jarod Hattab, Eran Palti
wiley   +1 more source

F-term multi-field inflation in supergravity without stabiliser superfields

Journal of High Energy Physics
Realising F -term slow-roll inflation in supergravity is non-trivial due to the well-known η-problem. The common strategy to solve the problem is to impose a shift symmetry on the Kähler potential, but this often leads to a negative potential in the ...
Jinn-Ouk Gong, Sergei V. Ketov, Takahiro Terada   +2 more
doaj   +1 more source

Sen's mechanism for self-dual super Maxwell theory

Nuclear Physics B
In several elementary particle scenarios, self-dual fields emerge as fundamental degrees of freedom. Some examples are the D=2 chiral boson, D=10 Type IIB supergravity, and D=6 chiral tensor multiplet theory.
G. Barbagallo, P.A. Grassi
doaj   +1 more source

Linearised actions for N $$ \mathcal{N} $$ -extended (higher-spin) superconformal gravity

Journal of High Energy Physics, 2019
The off-shell actions for N $$ \mathcal{N} $$ -extended conformal supergravity theories in three dimensions were formulated in [1, 2] for 1 ≤ N $$ \mathcal{N} $$ ≤ 6 using a universal approach.
Evgeny I. Buchbinde, Daniel Hutchings, Jessica Hutomo, Sergei M. Kuzenko   +3 more
doaj   +1 more source

New higher derivative action for tensor multiplet in N $$ \mathcal{N} $$ = 2 conformal supergravity in four dimensions

Journal of High Energy Physics, 2020
We will use the covariant superform approach to develop a new density formula for N $$ \mathcal{N} $$ = 2 conformal supergravity which is based on a fermionic multiplet whose lowest component is a dimension-5/2 spinor.
Subramanya Hegde, Bindusar Sahoo
doaj   +1 more source

Quantization of the Bianchi type-IX model in supergravity with a cosmological constant

, 1994
Diagonal Bianchi type-IX models are studied in the quantum theory of $ N = 1 $ supergravity with a cosmological constant. It is shown, by imposing the supersymmetry and Lorentz quantum constraints, that there are no physical quantum states in this model.
A. D. Y. Cheng, A. Maciás, C. Teitelboim, J. B. Hartle, J. B. Hartle, J. J. Halliwell, J. Wess, L. J. Alty, M. Asano, M. P. Ryan, P. D. D'Eath, P. D. D'Eath, P. D. D'Eath, P. D. D'Eath, P. D. D'Eath, P. D. D'Eath, P. D. D'Eath, P. D. D'Eath, P. D. D'Eath, P. K. Townsend, P. R. L. V. Moniz, R. Graham, R. Graham, R. Graham, S. W. Hawking   +24 more
core   +1 more source

Dilaton, moduli and string/five-brane duality as seen from four dimensions [PDF]

, 1993
A naive dimensional reduction of the $N=1, D=10$ supergravity theory that naturally arises in five-brane models is used to determine the r\^ole of two fields which are basic ingredients of string models: the dilaton and, among the moduli, the breathing ...
Adamietz, Bagger, Bergshoeff, Binétruy, Binétruy, Binétruy, Callan, Callan, Callan, Cecotti, Chamseddine, Chapline, Cremmer, Cremmer, Derendinger, Dine, Dixon, Duff, Duff, Duff, Duff, Ellis, Ferrara, Ferrara, Font, Gaillard, Green, Grimm, Limdström, P. Binétruy, Schwarz, Schwarz, Sen, Strominger, Witten, Witten   +35 more
core   +2 more sources

de Sitter State in Heterotic String Theory

Fortschritte der Physik, Volume 72, Issue 11, November 2024.
Abstract Recent no‐go theorems have ruled out four‐dimensional classical de Sitter vacua in heterotic string theory. On the other hand, the absence of a well‐defined Wilsonian effective action and other related phenomena also appear to rule out such time‐dependent vacua with de Sitter isometries, even in the presence of quantum corrections.
Stephon Alexander, Keshav Dasgupta, Archana Maji, Pichai Ramadevi, Radu Tatar   +4 more
wiley   +1 more source