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19912024
most citedPotential Sensitivity of Gamma-Ray Burster Observations to Wave Dispersion in Vacuo

1.4k citations

Showing 2009 · hep-thShow all

6 papers · 2 filters

hep-th2009★ 39 cited

Hitchin Equation, Singularity, and N=2 Superconformal Field Theories

Dimitri Nanopoulos, Dan Xie

We argue that Hitchin's equation determines not only the low energy effective theory but also describes the UV theory of four dimensional N=2 superconformal field theories when we…

hep-th2009★ 36 cited

On Crossing Symmmetry and Modular Invariance in Conformal Field Theory and S Duality in Gauge Theory

Dimitri Nanopoulos, Dan Xie

In this note, we explore the relation between crossing symmetry and modular invariance in conformal field theory and S-duality in gauge theory. It is shown that partition functions…

hep-th2009★ 28 cited

N=2 SU Quiver with USP Ends or SU Ends with Antisymmetric Matter

Dimitri Nanopoulos, Dan Xie

We consider the four dimensional scale invariant N=2 SU quiver gauge theories with USp(2N) ends or SU(2N) ends with antisymmetric matter representations. We argue that these theori…

hep-th2009★ 110 cited

Flipped SU(5) X U(1)_X Models from F-Theory

Jing Jiang, Tianjun Li, Dimitri V. Nanopoulos +1

We systematically construct flipped SU(5) X U(1)_X models without and with bulk vector-like particles from F-theory. To realize the decoupling scenario, we introduce sets of vector…

hep-th2009

MSSM-like AdS Flux Vacua with Frozen Open-string Moduli

Ching-Ming Chen, Tianjun Li, Van Eric Mayes +1

We construct supersymmetric Pati-Salam flux vacua in AdS from intersecting D6-branes on T^6/(Z_2 x Z_2'). The models constructed have three generations of MSSM matter plus right-ha…

hep-th2009★ 76 cited

Time Delays of Strings in D-particle Backgrounds and Vacuum Refractive Indices

Tianjun Li, Nick E. Mavromatos, Dimitri V. Nanopoulos +1

Using standard techniques in string/D-brane scattering amplitude computations, we evaluate the scattering of open strings off D-particles in brane world scenarios. The D-particles…