Dr
Tonnis ter Veldhuis
(Macalester College)
24/08/2010, 14:00
Formal
Holographic currents and their associated Ward identities are derived in the framework of gravity/gauge duality. Holographic improvements of the energy-momentum tensor and R-symmetry current which are consistent with the Ward identities are displayed. The effects of specific string loop corrections to the bulk action are included as four derivative effective lagrangian terms and their...
Dr
Shin Sasaki
(Tokyo Institute of Technology)
24/08/2010, 14:17
Formal
We investigate BPS conditions preserving n/12 (n=1, .. , 6) supersymmetries in the Aharony-Bergman-Jafferis-Maldacena (ABJM) model. The BPS equations are classified in terms of the number of preserved supercharges and remaining subgroups of the SU(4)_R symmetry. We study the structures of a map between projection conditions for the supercharges in eleven dimensions and those in the ABJM...
Dr
Nicola Ambrosetti
(University of Bern)
24/08/2010, 14:34
Formal
The effective action of string compactifications on Calabi-Yau manifolds can be described in 4d global N=2 supersymmetry in the gravity-decoupling limit. Adding D-branes brakes half of the supersymmetry, which is then nonlinearly realised on their worldvolume. I will describe the coupling of the DBI action for the D-brane gauge field to the Universal Hypermultiplet. Taking into account the...
Dr
Tetsuji Kimura
(KEK)
24/08/2010, 14:51
Formal
We investigate extremal Reissner-Nordstrom-AdS black holes in four-dimensional N=2 abelian gauged supergravity. We find a new attractor equation which is not reduced to the one in the asymptotically flat spacetime. Focusing on so-called the T^3-model with a single neutral vector multiplet, we obtain non-supersymmetric extremal Reissner-Nordstrom-AdS black hole solutions with regular event...
Yoji Koyama
(Department of Physics, Chuo University)
24/08/2010, 15:08
Astro
We construct a model of cosmological inflation and perturbation based on the higher-dimensional gauge theory. The inflaton and curvaton are the scalar fields arising from the extra space components of the gauge field living in more than four dimensions. We take the six-dimensional (6D) Yang-Mills theory compactified on $T^2$ as a toy model. The one-loop effective potential of the inflaton and...
Marcin Badziak
(University of Warsaw)
24/08/2010, 15:25
Astro
It is shown that two classes of racetrack inflation models, saddle point and inflection point ones, can be constructed in a fully supersymmetric framework with the matter field F-term as a source of supersymmetry breaking and uplifting. Two models of F-term supersymmetry breaking are considered: the Polonyi model and the quantum corrected O'Raifeartaigh model. In the former case, both classes...
