Conveners
Fundamental/String Theory
- Matthew Kleban (New York University)
Fundamental/String Theory
- Matthew Kleban (New York University)
Fundamental/String Theory
- John Terning (UC Davis)
Prof.
Supriya Kar
(University of Delhi (Department of Physics and Astrophysics))
24/08/2015, 14:30
Fundamental and String Theory
We revisit an effective curvature formalism underlying a two form in a U(1) gauge theory on a D4-brane in presence of a background black hole metric. Alternately the scenario may be analysed in presence of an extra fifth dimension transverse to a vacuum created gravitational pair of 3-brane and anti 3-brane by the Kalb-Ramond quanta. Interestingly an electric (non-linear) charge independence...
Dr
Afsaneh Bazrafshan
(Jahrom University)
24/08/2015, 15:00
Fundamental and String Theory
In this paper, we investigate the stability of nonlinear charged black holes in quartic quasitopological gravity in the presence of a nonlinear electromagnetic field. The entropy of the charged black holes of fourth order quasitopological gravity through the use of Wald formula is computed and the mass, temperature and the charge of these black holes are found as well. We show that black holes...
Mohammad Ghanaatian
(Payame Noor University)
24/08/2015, 15:30
Fundamental and String Theory
Quartic quasi-topological black holes in the presence of a nonlinear electromagnetic Born-Infeld field is presented. By using the metric parameters, the charged black hole
solutions of quasi-topological Born-Infeld gravity is considered.The thermodynamics of these black holes are investigated and I show that the thermodynamics and conserved quantities verify the first law of thermodynamics. I...
Dr
Daniel Butter
(Nikhef)
24/08/2015, 16:30
Fundamental and String Theory
I will discuss how to classify (up to discrete identifications) all rigid 4D N=2 supersymmetric backgrounds
in both Lorentzian and Euclidean signatures that preserve eight real supercharges.
These include backgrounds such as warped $S^3 \times \mathbb R$,
warped $AdS_3 \times \mathbb R$, and $AdS_2 \times S^2$, as well as some more exotic
geometries. Time permitting, I will also discuss...
Ivan Schmidt
24/08/2015, 17:00
Fundamental and String Theory
After a brief review of the main ideas of gravity with torsion, a scenario allowing a solution of the strong charge parity problem via the Peccei-Quinn mechanism, implemented in gravity with torsion, is presented. In this framework there appears a torsion-related pseudoscalar field known as Kalb-Ramond axion. It is compared with the so-called Barbero-Immirzi axion recently proposed in the...
David Schaich
(Syracuse University)
25/08/2015, 15:00
Fundamental and String Theory
Practical lattice discretizations of supersymmetric gauge theories are notoriously difficult to construct in four dimensions. N=4 supersymmetric Yang--Mills (SYM) is the only known 4d theory for which there exists a lattice formulation that exactly preserves a subset of the supersymmetry algebra. This exact supersymmetry has remarkable consequences that are crucial to the feasibility of...
Alysson Ferrari
25/08/2015, 15:30
Fundamental and String Theory
We propose a non-anticommutative superspace with the interesting property of relating to Lee-Wick type of higher derivatives theories, which are known for their interesting properties, and have lead to proposals of phenomenologicaly viable higher derivatives extensions of the Standard Model. The deformation of superspace we consider does not preserve supersymmetry or associativity in general,...
