DPF 2009

Session

String & Field Theory

31 Jul 2009, 14:00

Wayne State University

324. The Hamiltonian Approach to Yang-Mills (2+1): An Expansion Scheme and Corrections to String Tension

Dr Alexandr Yelnikov (City College of New York)

31/07/2009, 14:00

Field and String Theory

We carry out further analysis of the Hamiltonian approach to Yang-Mills theory in 2+1 dimensions which helps to place the calculation of the vacuum wave function and the string tension in the context of a systematic expansion scheme. The solution of the Schrodinger equation is carried out recursively. The computation of correlators is re-expressed in terms of a two-dimensional chiral boson...

286. Meson Configurations from String Theory

Kory Stiffler (University of Iowa)

31/07/2009, 14:20

Field and String Theory

The gauge/gravity correspondence has provided an avenue where modern superstring theory can come full circle back to nuclear physics. For an SU(N) gauge theory, certain low energy configurations of mesons with k quarks and k anti-quarks, have been studies in both the Hamiltonian formulation of Yang-Mills and lattice gauge theories. Utilizing the gauge/gravity correspondence of string...

249. Massive Quark Scattering at Strong Coupling from AdS/CFT

Edwin Barnes (University of Virginia)

31/07/2009, 14:40

Field and String Theory

We extend the analysis of Alday and Maldacena for obtaining gluon scattering amplitudes at strong coupling to include massive quark scattering. Our quarks are actually the N=2 hypermultiplets which arise when D7-brane probes are included in the AdS_5 x S^5 geometry. We first derive appropriate massive-particle boundary conditions for the string scattering worldsheets. We then find an exact...

241. Bjorken hydrodynamics from an AdS Schwarzschild black hole

Mr James Alsup (University of Tennessee)

31/07/2009, 15:00

Field and String Theory

We discuss the derivation of dissipative Bjorken hydrodynamics from a Schwarzschild black hole in asymptotically AdS spacetime of arbitrary dimension in the limit of large longitudinal proper time $\tau$. Using an appropriate slicing near the boundary, we calculate the Schwarzschild metric to next-to-next-to-leading order in the large $\tau$ expansion as well as the dual stress-energy tensor...

383. The fate of black branes in Einstein-Gauss-Bonnet gravity

Prof. L.C.R. Wijewardhana (University of Cincinnati)

31/07/2009, 15:20

Field and String Theory

Black branes are studied in Einstein-Gauss-Bonnet (EGB) gravity. Evaporation drives black branes towards one of two singularities depending on the sign of $\alpha$, the Gauss-Bonnet coupling. For positive $\alpha$ and sufficiently large ratio $\sqrt{\alpha}/L$, where $L/2\pi$ is the radius of compactification, black branes avoid the Gregory-Laflamme (GL) instability before reaching a critical...

34. Gauge-Invariant Localization of Infinitely Many Gravitational Energies from All Possible Auxiliary Structures

Dr J. Brian Pitts (University of Notre Dame)

31/07/2009, 15:40

Field and String Theory

The problem of finding a covariant expression for the distribution and conservation of gravitational energy-momentum dates to the 1910s. A suitably covariant infinite-component localization is displayed, reflecting Bergmann's realization that there are infinitely many gravitational energy-momenta. Initially use is made of a flat background metric (or rather, all of them) or connection,...

327. Solitons in AdS1+1

Prof. Tonnis ter Veldhuis (Macalester College)

31/07/2009, 16:30

Field and String Theory

Soliton solutions in scalar field theory in an AdS1+1 background are investigated. Analytic soliton solutions are obtained in specific models, and their mass is calculated. The fluctuation spectrum is determined, and the quantum correction to the soliton mass is computed.