Unparticles: Scales and High Energy Probes (2007)
Bander, Myron, Feng, Jonathan L., Rajaraman, Arvind, Shirman, Yuri
Unparticles from hidden conformal sectors provide qualitatively new possibilities for physics beyond the standard model. In the theoretical framework of minimal models, we clarify the relation...
Bounds on Unparticles from the Higgs Sector (2007)
Fox, Patrick J., Rajaraman, Arvind, Shirman, Yuri
We study supersymmetric QCD in the conformal window as a laboratory for unparticle physics, and analyze couplings between the unparticle sector and the Higgs sector. These couplings can lead to the...
A Simple Model of Low-scale Direct Gauge Mediation (2006)
Csáki, Csaba, Shirman, Yuri, Terning, John
We construct a calculable model of low-energy direct gauge mediation making use of the metastable supersymmetry breaking vacua recently discovered by Intriligator, Seiberg and Shih. The standard...
Moduli Decays and Gravitinos (2006)
Dine, Michael, Kitano, Ryuichiro, Morisse, Alexander, Shirman, Yuri
One proposed solution of the moduli problem of string cosmology requires that the moduli are quite heavy, their decays reheating the universe to temperatures above the scale of nucleosynthesis. In...
Supersymmetry breaking and the radion in AdS_4 brane-worlds (2006)
Katz, Andrey, Shadmi, Yael, Shirman, Yuri
We compute the one-loop correction to the radion potential in the Randall-Sundrum model with detuned brane tensions, with supersymmetry broken by boundary conditions. We concentrate on the...
Supersymmetry Breaking and Moduli Stabilization in AdS (2005)
Katz, Andrey, Redi, Michele, Shadmi, Yael, Shirman, Yuri
We study the one loop effective potential for the radion superfield in the supersymmetric Randall-Sundrum scenario with detuned brane tensions. At the classical level the distance between the branes...
Csaki, Csaba, Marandella, Guido, Shirman, Yuri, Strumia, Alessandro
Supersymmetry combined with little-Higgs can render the Higgs vev super-little, providing models of electroweak symmetry breaking free from fine-tunings. We discuss the difficulties that arise in...
Towards a chiral gauge theory by deconstruction in AdS5 (2005)
Bhattacharya, Tanmoy, Gupta, Rajan, Martin, Matthew R., Shirman, Yuri, Csaki, Csaba, Terning, John
We describe an implementation of a deconstructed gauge theory with charged fermions defined on an interval in five dimensional AdS space. The four dimensional slices are Minkowski, and the end slices...
Warped Domain Wall Fermions (2005)
Bhattacharya, Tanmoy, Csaki, Csaba, Martin, Matthew R., Shirman, Yuri, Terning, John
We consider Kaplan's domain wall fermions in the presence of an Anti-de Sitter (AdS) background in the extra dimension. Just as in the flat space case, in a completely vector-like gauge theory...
Strong CP, Flavor, and Twisted Split Fermions (2004)
Harnik, Roni, Perez, Gilad, Schwartz, Matthew D., Shirman, Yuri
We present a natural solution to the strong CP problem in the context of split fermions. By assuming CP is spontaneously broken in the bulk, a weak CKM phase is created in the standard model due to a...
The strength of small-instanton amplitudes in gauge theories with compact extra dimensions (2002)
We study instanton effects in theories with compact extra dimensions. We perform an instanton calculation in a 5d theory on a circle of radius R, with gauge, scalar, and fermion fields in the bulk of...
Exact results in 5D from instantons and deconstruction (2002)
Csáki, Csaba, Erlich, Joshua, Khoze, Valentin V., Poppitz, Erich, Shadmi, Yael, Shirman, Yuri
We consider nonperturbative effects in theories with extra dimensions and the deconstructed versions of these theories. We establish the rules for instanton calculations in 5D theories on the circle,...
Universal Aspects of Gravity Localized on Thick Branes (2000)
Csaki, Csaba, Erlich, Joshua, Hollowood, Timothy J., Shirman, Yuri
We study gravity in backgrounds that are smooth generalizations of the Randall-Sundrum model, with and without scalar fields. These generalizations include three-branes in higher dimensional spaces...
Brane Junctions in the Randall-Sundrum Scenario (1999)
We present static solutions to Einstein's equations corresponding to branes at various angles intersecting in a single 3-brane. Such configurations may be useful for building models with localized...
Dynamical Supersymmetry Breaking (1999)
Supersymmetry is one of the most plausible and theoretically motivated frameworks for extending the Standard Model. However, any supersymmetry in Nature must be a broken symmetry. Dynamical...
Remarks on the Racetrack Scheme (1999)
There are only a small number of ideas for stabilizing the moduli of string theory. One of the most appealing of these is the racetrack mechanism, in which a delicate interplay between two strongly...
New Models of Gauge Mediated Dynamical Supersymmetry Breaking (1997)
We propose a simple class of nonrenormalizable models of gauge mediated dynamical supersymmetry breaking. The models do not have gauge singlet fields. The Standard Model gauge group is embedded in...
Dynamical Supersymmetry Breaking versus Run-away behavior in Supersymmetric Gauge Theories (1996)
We consider Dynamical Supersymmetry Breaking (DSB) in models with classical flat directions. We analyze a number of examples, and develop a systematic approach to determine if classical flat...
Variations on Minimal Gauge Mediated Supersymmetry Breaking (1996)
Dine, Michael, Nir, Yosef, Shirman, Yuri
We study various modifications to the minimal models of gauge mediated supersymmetry breaking. We argue that, under reasonable assumptions, the structure of the messenger sector is rather restricted....
Truly Strong Coupling and Large Radius in String Theory (1996)
String theory, if it describes nature, is probably strongly coupled. In light of recent developments in string duality, this means that the ``real world'' should correspond to a region of the...
New Tools for Low Energy Dynamical Supersymmetry Breaking (1995)
Dine, Michael, Nelson, Ann E., Nir, Yosef, Shirman, Yuri
We report the construction of large new classes of models which break supersymmetry dynamically. We then turn to model building. Two of the principal obstacles to constructing simple models of...