137 citations · 652 across the 24 of their papers we have counts for
20 papers · 1 filter
Degenerate vortices and world-line instantons in three-dimensional gauge theories
Evgenii Ievlev, Mikhail Shifman
In this paper we continue the study of particle-like topological solitons with degenerate masses and their mixing due to world-line instantons. Previously, this phenomenon was stud…
Degenerate kinks and kink-instantons in two-dimensional scalar field models with and supersymmetry
Evgenii Ievlev, Mikhail Shifman
Models with classically degenerate vacua often support quasiclassical configurations of nontrivial topology. In (0+1)-dimensional quantum mechanics with a double-well potential, fo…
Degenerate Domain Walls in Supersymmetric Theories
Shi Chen, Evgenii Ievlev, Mikhail Shifman
In supersymmetric Yang-Mills theories (SYM) tension-degenerate domain walls are typical. Adding matter fields in fundamental representation we arrive at supersymmetric QCD (SQCD) s…
Two types of domain walls in super-QCD: how they are classified and counted
Shi Chen, Evgenii Ievlev, Mikhail Shifman
We study multiplicities and junctions of BPS domain walls interpolating between different chiral vacua in supersymmetric QCD (SQCD) with the SU gauge group and…
New Soft Theorems for Two-Scalar Sigma Models
Karol Kampf, Jiri Novotny, Mikhail Shifman +1
In this paper, we study the scattering amplitudes and soft theorems for the sigma models with two scalars. We show that if the particles are Goldstone bosons, then you necessarily…
First-order formalism for functions in bosonic sigma models from supersymmetry breaking
Oleksandr Gamayun, Andrei Losev, Mikhail Shifman
We consider the renormalization group flow equation for the two-dimensional sigma models with the Kähler target space. The first-order formulation allows us to treat perturbations…
Relating and in the SQCD Conformal Window
Mikhail Shifman, Roman Zwicky
In this note we show that , the -function slopes in the electric and magnetic theories are equal at the corresponding infrared fixed points. This follows from the scaling…
N=(0,2) Deformation of CP(1) Model: Two-dimensional Analog of N=1 Yang-Mills Theory in Four Dimensions
Xiaoyi Cui, M. Shifman
We consider two-dimensional sigma models with the CP(1) target space. A minimal model of this type has one left-handed fermion. Nonminimal extensions contain, i…
N=(0,2) Supersymmetry and a Nonrenormalization Theorem
Xiaoyi Cui, M. Shifman
In this paper we continue the study of perturbative renormalizations in an supersymmetric model. Previously we analyzed one-loop graphs in the heterotically def…
SUSY Relics in One-Flavor QCD from a New 1/N Expansion
A. Armoni, M. Shifman, G. Veneziano
We suggest a new large-N_c limit for multi flavor QCD. Since fundamental and two-index antisymmetric representations are equivalent in SU(3), we have the option to define SU(N_c) Q…
N=2 Sigma Model with Twisted Mass and Superpotential: Central Charges and Solitons
A. Losev, M. Shifman
We consider supersymmetric sigma models on the Kahler target spaces, with twisted mass. The Kahler spaces are assumed to have holomorphic Killing vectors. Introduction of a superpo…
Domain Walls and Flux Tubes in N=2 SQCD: D-Brane Prototypes
M. Shifman, A. Yung
This paper could have been entitled "D branes and strings from flesh and blood." We study field theoretic prototypes of D branes/strings. To this end we consider (2+1)-dimensional…
Reduced N=2 Quantum Mechanics: Descendants of the Kahler Geometries
A. Losev, M. Shifman
We discuss an N=2 quantum mechanics with or without a central charge. A representation is constructed with the number of bosonic degrees of freedom less that one half of the fermio…
Single State Supermultiplet in 1+1 Dimensions
A. Losev, M. Shifman, A. Vainshtein
We consider multiplet shortening for BPS solitons in N=1 two-dimensional models. Examples of the single-state multiplets were established previously in N=1 Landau-Ginzburg models.…
D-Walls and Junctions in Supersymmetric Gluodynamics in the Large N Limit Suggest the Existence of Heavy Hadrons
G. Gabadadze, M. Shifman
A number of arguments exists that the "minimal" BPS wall width in large N supersymmetric gluodynamics vanishes as 1/N. There is a certain tension between this assertion and the fac…
Exact Results in Gauge Theories: Putting Supersymmetry to Work. The 1999 Sakurai Prize Lecture
M. Shifman
Powerful methods based on supersymmetry allow one to find exact solutions to certain problems in strong coupling gauge theories. The inception of some of these methods (holomorphy…
Domain Walls and Decay Rate of the Excited Vacua in the Large N Yang-Mills Theory
M. Shifman
In the (non-supersymmetric) Yang-Mills theory in the large N limit there exists an infinite set of non-degenerate vacua. The distinct vacua are separated by domain walls whose tens…
Energy Reflection Symmetry of Lie-Algebraic Problems: Where the Quasiclassical and Weak Coupling Expansions Meet
M. Shifman, A. Turbiner
We construct a class of one-dimensional Lie-algebraic problems based on sl(2) where the spectrum in the algebraic sector has a dynamical symmetry E -> - E. All 2j+1 eigenfunctions…
Degeneracy and Continuous Deformations of Supersymmetric Domain Walls
M. Shifman
In a wide class of supersymmetric theories degenerate families of the BPS-saturated domain walls exist. The internal structure of these walls can continuously vary, without changin…
Fractons in Twisted Multiflavor Schwinger Model
M. Shifman, A. Smilga
We consider two-dimensional QED with several fermion flavors on a finite spatial circle. A modified version of the model with {\em flavor-dependent} boundary conditions $ψ_p(L) = e…