Bulletin of the American Physical Society
2008 Joint Fall Meeting of the Texas and Four Corners Sections of APS, AAPT, and Zones 13 and 16 of SPS, and the Societies of Hispanic & Black Physicists
Volume 53, Number 11
Friday–Saturday, October 17–18, 2008; El Paso, Texas
Session B3: High Energy Physics: Theory |
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Chair: Teruki Kamon, Texas A&M University Room: Union East, 3rd Floor Smiley |
Friday, October 17, 2008 10:30AM - 10:42AM |
B3.00001: The Spin-Statistics connection in String theory Menika Sharma The Spin-Statistics connection is a well-tested consequence of quantum field theory. However it cannot be ruled out that a quantum theory of gravity may violate this theorem. In this talk we examine what String theory has to say about the relation of spin and statistics. [Preview Abstract] |
Friday, October 17, 2008 10:42AM - 10:54AM |
B3.00002: Chiral Supergravity in Three Dimensions Sean Downes, Melanie Becker, Ergin Sezgin Topologically massive gravity in three dimensions consists of Einstein gravity with a negative cosmological constant $\Lambda = -\frac{1}{\ell^{2}}$ and a gravitational Chern-Simons term with coupling $\frac{1}{\mu}$ It was recently argued that a consistent chiral theory emerges at the critical value $\mu\ell = 1$. This theory can be consistently extended to chiral supergravity in three dimensions. Linearized gravitino excitations are derived in analogy with the graviton solutions, replete with chiral behavior at the critial point. Linearized energy is analyzed in light of vacuum stability. So-called ``logarithmic modes'' are also discussed. [Preview Abstract] |
Friday, October 17, 2008 10:54AM - 11:06AM |
B3.00003: Dark Matter in the Left-Right Twin Higgs Model Ethan Dolle, Shufang Su In the left-right twin Higgs model, one of the neutral Higgses is a natural candidate for WIMP dark matter. We analyzed the dark matter relic density in this framework and identified regions of parameter space that provide the right amount of dark matter. We also studied the dark matter in the more general inert Higgs doublet model in which the mass splittings between the dark matter and other particles do not follow the relations in the left-right twin Higgs model. [Preview Abstract] |
Friday, October 17, 2008 11:06AM - 11:18AM |
B3.00004: Supersymmetry breaking, heterotic strings and fluxes Chris Bertinato, Katrin Becker, Yu-Chieh Chung, Guangyu Guo Toward constructing supersymmetry breaking torsional backgrounds in heterotic string theory we consider a type IIB background which arises as the orientifold limit of a flux background of M-theory on $K3 \times K3$. In type IIB the background geometry is a product of 4d Minkowski space with $K3 \times T^2 / {\cal{Z}}_2$. We then derive the conditions imposed upon the fluxes by supersymmetry. Inspired by a duality known to exist between type IIB and the heterotic theory in the context of preserved supersymmetry, we construct torsional flux backgrounds in the heterotic theory. We explicitly show that the new heterotic backgrounds solve the equations of motion. Then we proceed to analyze the conditions for unbroken supersymmetry and show how to construct susy breaking backgrounds with a vanishing cosmological constant in four dimensions. These solutions are a step towards addressing the question on how to stabilize moduli in compactifications of heterotic string theory. [Preview Abstract] |
Friday, October 17, 2008 11:18AM - 11:30AM |
B3.00005: On the Connection Between Chiral Gravity and String Theory Paul Bruillard, Melanie Becker Topologically Massive Gravity in bulk AdS$_{3}$ at the chiral point ($\mu\textit{l}=1$), termed Chiral Gravity, is analyzed and found to be equivalent to a Chiral Wess-Zumino-Witten model on the boundary. This not only exhibits an example of the AdS$_{3}$/CFT$_{2}$ correspondence, but also reveals a natural relationship by which Chiral Gravity can be embedded in string theory. The resulting string theory is then examined and found to restrict the parameter space of the gravity theory, effectively quantizing the anti-de Sitter radius. [Preview Abstract] |
Friday, October 17, 2008 11:30AM - 11:42AM |
B3.00006: Mirror Symmetry for Quasi-Homogeneous Singularities Himal Rathnakumara, Tyler Jarvis I will present an introduction to mirror symmetry in the context of string theory. Then I will describe an instance of mirror symmetry for singularties defined by quasi-homogeneous polynomials in weighted projective spaces. Milnor rings and the FJRW (Fan-Jarvis-Ruan-Witten) rings associated with these singularities and their relation to the Landua-Ginzburg A model and the Landua-Ginzburg B model will be explained. Results of the calculations for certain singularities for which the mirror symmetry conjecture has been verified will be presented. [Preview Abstract] |
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