Low-scale gaugino mediation, lots of leptons at the LHC (2008)
De Simone, Andrea, Fan, JiJi, Schmaltz, Martin, Skiba, Witold
Low-scale gaugino mediation predicts that gauginos are significantly heavier than scalar superpartners. In order of increasing mass the lightest superpartners are the gravitino, right-handed sleptons...
Standard Model couplings and collider signatures of a light scalar (2008)
Fan, JiJi, Goldberger, Walter D., Ross, Andreas, Skiba, Witold
The electroweak symmetry breaking (EWSB) sector of the Standard Model can be far richer and more interesting than the usual single scalar doublet model. We explore scenarios where the EWSB sector is...
Light scalar at LHC: the Higgs or the dilaton? (2007)
Goldberger, Walter D., Grinstein, Benjamin, Skiba, Witold
It is likely that the LHC will observe a color- and charge-neutral scalar whose decays are consistent with those of the Standard Model (SM) Higgs boson. The Higgs interpretation of such a discovery...
Using jet mass to discover vector quarks at the LHC (2007)
Skiba, Witold, Tucker-Smith, David
We illustrate the utility of jet mass distributions as probes of new physics at the LHC, focusing on a heavy vector-quark doublet that mixes with the top as a concrete example. For 1 TeV vector-quark...
Spin dependent masses and Sim(2) symmetry (2006)
Fan, JiJi, Goldberger, Walter D., Skiba, Witold
Recently, Cohen and Glashow pointed out that all known experimental tests of relativistic kinematics are consistent with invariance of physics under the four-parameter subgroup Sim(2) of the Lorentz...
Disguising the Oblique Parameters (2006)
Grojean, Christophe, Skiba, Witold, Terning, John
We point out a set of operator identities that relate the operators corresponding to the oblique corrections to operators that modify fermion couplings to the gauge bosons as well as operators that...
Little Higgs Models and Electroweak Measurements (2005)
Using effective field theory approach, we study the constraints from electroweak data on the SU(5)/SO(5), SU(6)/SP(6), SU(3)xU(1) little Higgs models and their variations. We construct an effective...
Effective Theory Analysis of Precision Electroweak Data (2004)
We obtain the bounds on arbitrary linear combinations of operators of dimension 6 in the Standard Model. We consider a set of 21 flavor and CP conserving operators. Each of our 21 operators is...
Little Higgses and Turtles (2004)
Kaplan, David E., Schmaltz, Martin, Skiba, Witold
We present an ultra-violet extension of the "simplest little Higgs" model. The model marries the simplest little Higgs at low energies to two copies of the "littlest Higgs'' at higher energies. The...
Family Unification on an Orbifold (2004)
We construct a family-unified model on a Z_2xZ_2 orbifold in five dimensions. The model is based on a supersymmetric SU(7) gauge theory. The gauge group is broken by orbifold boundary conditions to a...
A Simple Model of two Little Higgses (2003)
We construct a little Higgs model using a simple global symmetry group SU(9) spontaneously broken to SU(8). The electroweak interactions are extended to SU(3)xU(1) and embedded in SU(9). At the...
Little Higgses from an Antisymmetric Condensate (2002)
Low, Ian, Skiba, Witold, Smith, David
We construct an SU(6)/Sp(6) non-linear sigma model in which the Higgses arise as pseudo-Goldstone bosons. There are two Higgs doublets whose masses have no one-loop quadratic sensitivity to the...
PP-wave string interactions from perturbative Yang-Mills theory (2002)
Constable, Neil R., Freedman, Daniel Z., Headrick, Matthew, Minwalla, Shiraz, Motl, Lubos, Postnikov, Alexander, ...
Recently, Berenstein et al. have proposed a duality between a sector of N=4 super-Yang-Mills theory with large R-charge J, and string theory in a pp-wave background. In the limit considered, the...
Localized Fermions and Anomaly Inflow via Deconstruction (2002)
We study fermion localization in gauge theory space. We consider four dimensional product gauge groups in which light chiral fermions transform under different gauge factors of the product group....
Mother Moose: Generating Extra Dimensions from Simple Groups at Large N (2001)
We show that there exists a correspondence between four dimensional gauge theories with simple groups and higher dimensional gauge theories at large N. As an example, we show that a four dimensional...
Radion Stabilization by Brane Matter (2000)
Grinstein, Benjamin, Nolte, Detlef R., Skiba, Witold
We find a static solution to Einstein's field equations on a five-dimensional orbifold with a compact S_1/Z_2 fifth direction and Poincare invariant 3+1 sections. The solution describes a theory with...
On a Covariant Determination of Mass Scales in Warped Backgrounds (2000)
Grinstein, Benjamin, Nolte, Detlef R., Skiba, Witold
We propose a method of determining masses in brane scenarios which is independent of coordinate transformations. We apply our method to the scenario of Randall and Sundrum (RS) with two branes, which...
Adding Matter to Poincare Invariant Branes (2000)
Grinstein, Benjamin, Nolte, Detlef R., Skiba, Witold
A solution to the cosmological constant problem has been proposed in which our universe is a 3-brane in a 5-dimensional spacetime. With a bulk scalar, the field equations admit a Poincare invariant...
The Superpartner Spectrum of Gaugino Mediation (2000)
Schmaltz, Martin, Skiba, Witold
We compute the superpartner masses in a class of models with gaugino mediation (or no-scale) boundary conditions at a scale between the GUT and Planck scales. These models are compelling because they...
Minimal Gaugino Mediation (2000)
Schmaltz, Martin, Skiba, Witold
We propose Minimal Gaugino Mediation as the simplest known solution to the supersymmetric flavor and CP problems. The framework predicts a very minimal structure for the soft parameters at ultra-high...
Functions of Orbifold Theories and the Hierarchy Problem (1999)
We examine a class of gauge theories obtained by projecting out certain fields from an N = 4 supersymmetric SU(N) gauge theory. These theories are non-supersymmetric and in the large N limit are...
Correlators of Short Multi-Trace Operators in N=4 Supersymmetric Yang-Mills (1999)
Multi-trace scalar operators in the (0,k,0) representations of SU(4)_R share many properties with their single-trace analogs. These multi-trace operators are primary fields of short representations...
Beta Functions of Orbifold Theories and the Hierarchy Problem (1999)
Csaki, Csaba, Skiba, Witold, Terning, John
We examine a class of gauge theories obtained by projecting out certain fields from an N=4 supersymmetric SU(N) gauge theory. These theories are non-supersymmetric and in the large N limit are known...
Bonus Symmetry and the Operator Product Expansion of N=4 Super-Yang-Mills (1999)
Intriligator, Kenneth, Skiba, Witold
The superconformal group of N=4 super-Yang-Mills has two types of operator representations: short and long. We conjecture that operator product expansions for which at least two of the three...
Field Theory Tests for Correlators in the AdS/CFT Correspondence (1998)
D'Hoker, Eric, Freedman, Daniel Z., Skiba, Witold
The order g^2 radiative corrections to all 2- and 3-point correlators of the composite primary operators Tr X^k are computed in {\cal N} = 4 supersymmetric Yang-Mills theory with gauge group SU(N)....
The Low-Energy Dynamics of N=1 SUSY Gauge Theories with Small Matter Content (1998)
We describe the low-energy dynamics of N=1 supersymmetric gauge theories with the Dynkin index of matter fields less than or equal to the Dynkin index of the adjoint plus two. We explain what kinds...
Searching for the Scalar of the Strongly-Coupled Standard Model (1998)
We investigate decays of the scalar bound state present in the Abbott-Farhi model. We show that decays with photons in the final state may have large branching ratios. We also show that operators...
Duality in Sp and SO Gauge Groups from M Theory (1998)
We describe fivebrane configurations in M theory whose 4-d spacetime contains N = 1 supersymmetric Sp or SO gauge fields and fundamentals of these groups. We show how fieldtheory dualities for Sp and...
Supersymmetric gauge theories with a free algebra of invariants (1998)
Dotti, Gustavo, Manohar, Aneesh V., Skiba, Witold
We study the low-energy dynamics of all N=1 supersymmetric gauge theories whose basic gauge invariant fields are unconstrained. This set includes all theories whose matter Dynkin index is less than...
Gauge Theories with Tensors from Branes and Orientifolds (1998)
Csaki, Csaba, Schmaltz, Martin, Skiba, Witold, Terning, John
We present brane constructions in Type IIA string theory for N=1 supersymmetric SO and Sp gauge theories with tensor representations using an orientifold 6-plane. One limit of these set-ups...
Classification of the N=1 Seiberg-Witten Theories (1998)
We present a systematic study of N=1 supersymmetric gauge theories which are in the Coulomb phase. We show how to find all such theories based on a simple gauge group and no tree-level...
Duality in Sp and SO Gauge Groups from M Theory (1997)
We describe fivebrane configurations in M theory whose 4-d spacetime contains N=1 supersymmetric Sp or SO gauge fields and fundamentals of these groups. We show how field-theory dualities for Sp and...
Composite Intermediary and Mediator Models of Gauge-Mediated Supersymmetry Breaking (1997)
Csaki, Csaba, Randall, Lisa, Skiba, Witold
We discuss gauge-mediated models which employ a tree-level mass term in the superpotential. We give explicit composite realizations in which the mass terms are not fundamental. Instead, they arise as...
N=1 Supersymmetric Product Group Theories in the Coulomb Phase (1997)
Csaki, Csaba, Erlich, Joshua, Freedman, Daniel, Skiba, Witold
We study the low-energy behavior of N=1 supersymmetric gauge theories with product gauge groups SU(N)^M and M chiral superfields transforming in the fundamental representation of two of the SU(N)...
Dynamical Supersymmetry Breaking (1997)
We review mechanisms of dynamical supersymmetry breaking. Several observations that narrow the search for possible models of dynamical supersymmetry breaking are summarized. These observations...
Self-Dual N=1 SUSY Gauge Theories (1997)
Csaki, Csaba, Schmaltz, Martin, Skiba, Witold, Terning, John
We present a large set of new self-dual N=1 SUSY gauge theories. Examples include SU(N) theories with tensors and SO(N) theories with spinors. Using these dualities as starting points, new...
Strong dynamics in theories beyond the standard model /--by Witold Skiba. (1997)
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
Strong dynamics in theories beyond the standard model (1997)
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
Strong dynamics in theories beyond the standard model (1997)
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
Signatures of Pseudo-Goldstone Bosons in Technicolor Theories with the GIM Mechanism (1996)
Technicolor models with the GIM mechanism are successful solutions to common problems of technicolor model building. These models have a rich set of new particles and interactions. We present the...
Confinement in N=1 SUSY Gauge Theories and Model Building Tools (1996)
Csaki, Csaba, Schmaltz, Martin, Skiba, Witold
We develop a systematic approach to confinement in N=1 supersymmetric theories. We identify simple necessary conditions for theories to confine without chiral symmetry breaking and to generate a...
A Systematic Approach to Confinement in N=1 Supersymmetric Gauge Theories (1996)
Csaki, Csaba, Schmaltz, Martin, Skiba, Witold
We give necessary criteria for N=1 supersymmetric theories to be in a smoothly confining phase without chiral symmetry breaking and with a dynamically generated superpotential. Using our general...
Exact Results and Duality for SP(2N) SUSY Gauge Theories with an Antisymmetric Tensor (1996)
Csaki, Csaba, Skiba, Witold, Schmaltz, Martin
We study supersymmetric Sp(2N) gauge theories with matter in the antisymmetric tensor representation and F fundamentals. For F=6 we solve the theory exactly in terms of confined degrees of freedom...
Supersymmetry Breaking Through Confining and Dual Theory Gauge Dynamics (1996)
Csaki, Csaba, Randall, Lisa, Skiba, Witold, Leigh, Robert
We show that theories in the confining, free magnetic, and conformal phases can break supersymmetry through dynamical effects. To illustrate this, we present theories based on the gauge groups...
More Dynamical Supersymmetry Breaking (1996)
Csaki, Csaba, Randall, Lisa, Skiba, Witold
In this paper we introduce a new class of theories which dynamically break supersymmetry based on the gauge group SU(n)xSU(3)xU(1) for even n. These theories are interesting in that no dynamical...
Signatures of Technicolor Models with the GIM Mechanism (1996)
We investigate the production and the decays of pseudo-Goldstone bosons (PGBs) predicted by technicolor theories with the GIM mechanism (TC-GIM). The TC-GIM models contain exotic fermion families...
Searching for the Scalar of the Strongly-Coupled Standard Model (1995)
We investigate decays of the scalar bound state present in the Abbott-Farhi model. We show that decays with photons in the final state may have large branching ratios. We also show that operators...
Constraining the Strongly-Coupled Standard Model Including a W' Isotriplet (1995)
We consider the Strongly-Coupled Standard Model (Abbott-Farhi model) including an isotriplet of W' vector bosons. First we calculate the corrections to the low-energy theory, which can be effectively...