119087273
1/4 BPS dyonic calorons
We explore the 1/4 BPS configurations of the supersymmetric gauge theories on $R^{1+3} \times S^1$. The BPS bound for energy and the BPS equations are obtained and the characteristics of the BPS solutions are studied. These BPS configurations describe electrically charged calorons, which are constituted of dyons and carry linear momentum along the compact direction. We carry out various approaches to the single caloron case in the theory of SU(2) gauge group.
7063414
Mass-Deformed Bagger-Lambert Theory and its BPS Objects
We find a 16-supersymmetric mass-deformed Bagger-Lambert theory with SO(4)xSO(4) global R symmetry. The R charge plays the role of the noncentral term in the superalgebra. This theory has one symmetric vacuum and two inequivalent broken sectors of vacua. Each sector of the broken symmetry has SO(4) geometry. We find the 1/2 BPS domain walls connecting the symmetric phase and any broken phase, and 1/4 BPS supertubelike objects, which may appear as anyonic q-balls in the symmetric phase or vortices in the broken phase. We also discuss mass deformations, which reduce the number of supersymmetries.
29030259
Magnetic monopole with Wilson-loop symmetry breaking.
A nonsingular classical magnetic-monopole solution is obtained in a theory with Wilson-loop symmetry breaking. The solution is used to elucidate the quantization rules governing the magnetic charge, which are more restrictive than those for Higgs monopoles.
11205361
The CP(n) model on noncommutative plane
We construct the consistent CP(n) model on noncommutative plane. The Bogomolny bound on the energy is saturated by (anti-)self-dual solitons with integer topological charge, which is independent of their scaling and orientation. This integer quantization is satisfied for our general solutions, which turns out regular everywhere. We discuss the possible implication of our result to the instanton physics in Yang–Mills theories on noncommutative R4.
119199828
The general M5-brane superconformal index
We calculate and study the general superconformal index for the 6d U(N) (2,0) theory with four chemical potentials, from the indices of gauge theories on CP^2 x R. Our index agrees with the large N supergravity index on AdS_7 x S^4 at low energies, and also yields the negative 'Casimir energy' with an N^3 scaling which was recently calculated from a QFT on S^5. Our approach also suggests a systematic study of the (1,0) superconformal indices.
119250832
New BPS configurations of BMN matrix theory
We explore the 1/2 BPS configurations in BMN matrix theory with SO(3) angular momentum of SO(3) × SO(6) symmetry. The fluctuation analysis of the BPS configurations near the abelian solutions and also the fuzzy two sphere vacua reveals how nonabelian BPS configurations emerge. Especially the irreducible nonabelian configurations seem to have the maximal angular momentum of order N3, beyond which they collapse to abelian ones. We also find some new BPS configurations explicitly.
203614509
Ju n 20 08 Production of the charged Higgs bosons at the CERN Large Hadron Collider in the left-right symmetric model
Search of Higgs bosons is the primary goal of the CERN Large Hadron Collider (LHC). In the standard model (SM), one neutral Higgs boson exists as a result of the electroweak symmetry breaking (EWSB), of which mass is not predicted in the theoretical framework. The discovery potential for the SM Higgs boson at the LHC will reach to about 1 TeV with the integrated luminosity of 100 fb. It implies that the SM Higgs boson will be discovered at the LHC at more than 5-σ level. In many models of new physics beyond the SM, however, more symmetries are involved and the Higgs sector should be extended to break larger symmetry. Signatures of an extended Higgs sector would provide direct evidence for new physics beyond the SM. Models with an extended Higgs sector often contain charged Higgs bosons H, which do not exist within the SM. The two Higgs doublet model (2HD) is one of the simplest extension of the SM and the Higgs structure of the minimal supersymmetric standard model (MSSM). There are three neutral Higgs bosons, h, H, A and a pair of charged Higgs bosons H in the 2HD model and the MSSM. Hereafter the 2HD model and the MSSM are just called the 2HD model generically. If the H bosons are lighter than the top quark, they can be produced in the top quark decay processes t → bH. Search for H from top quark decays in the 2HD model has been performed at Tevatron and no evidence for H production is found [1]. The CERN Large Electron Positron Collider (LEP) has also examined the charged Higgs bosons up to √ s = 200 GeV through the pair production of H to present the lower bound of the charged Higgs boson mass [2, 3]. Recent measurement of Br(B → τν) by Belle provides indirect constraints on the charged Higgs bosons in the 2HD model via the annihilation diagram mediated by H boson [4, 5]. The absence of the observed charged Higgs boson so far derives constraints on (tanβ,mH±) parameter space for the 2HD model. If the charged Higgs bosons are heavier than the top quark, we have to observe the direct production at hadron colliders. The most promising channel for the charged Higgs boson production at the LHC is the gb → tH process which has been extensively studied [6, 7, 8, 9]. The Drell-Yan mechanism gg, qq̄ → HH and the associated production with a W boson, qq̄ → HW are suppressed due to the weak couplings, low quark luminosity, and loop suppression. The discovery potential of the H bosons at the LHC has been studied by ATLAS [10] and CMS [11] groups. Expected to be discovered is a MSSM charged Higgs boson as heavy as 1 TeV at the 5-σ confidence level, or may be excluded up to the mass of 1.5 TeV at 95 % C.L. at the LHC with the MSSM radiative corrections [9]. The left-right (LR) symmetric model based on the gauge symmetry, SU(2)L× SU(2)R× U(1)B−L, usually contain a bidoublet Higgs field φ(2, 2̄, 0) for the EWSB and the Yukawa couplings represented by
118607530
Supersymmetric Double Field Theory: Stringy Reformulation of Supergravity
We construct a supersymmetric extension of double field theory that realizes the ten-dimensional Majorana-Weyl local supersymmetry. In terms of a stringy differential geometry we proposed earlier, our action consists of five simple terms -- two bosonic plus three fermionic -- and manifests not only diffeomorphism and one-form gauge symmetry of B-field, but also O(10,10) T-duality as well as a direct product of two local Lorentz symmetries, SO(1,9) \times SO(9,1). A gauge fixing that identifies the double local Lorentz groups reduces our action to the minimal supergravity in ten dimensions.
12913086
Singlet fermionic dark matter
We propose a renormalizable model of a fermionic dark matter by introducing a gauge singlet Dirac fermion and a real singlet scalar. The bridges between the singlet sector and the standard model sector are only the singlet scalar interaction terms with the standard model Higgs field. The singlet fermion couples to the standard model particles through the mixing between the standard model Higgs and singlet scalar and is naturally a weakly interacting massive particle (WIMP). The measured relic abundance can be explained by the singlet fermionic dark matter as the WIMP within this model. Collider implication of the singlet fermionic dark matter is also discussed. Predicted is the elastic scattering cross section of the singlet fermion into target nuclei for a direct detection of the dark matter. Search of the direct detection of the dark matter provides severe constraints on the parameters of our model.
1381801
Probing the messenger of supersymmetry breaking by the muon anomalous magnetic moment
Motivated by the recently measured muon's anomalous magnetic moment $a_{\mu}$, we examine the supersymmetry contribution to $a_{\mu}$ in various mediation models of supersymmetry breaking which lead to predictive flavor conserving soft parameters at high energy scale. The studied models include dilaton/modulus-mediated models in heterotic string/$M$ theory, gauge-mediated model, no-scale or gaugino-mediated model, and also the minimal and deflected anomaly-mediated models. For each model, the range of $a^{SUSY}_{\mu}$ allowed by other experimental constraints, e.g. b --> s\gamma and the collider bounds on superparticle masses, is obtained together with the corresponding parameter region of the model. Gauge-mediated models with low messenger scale can give any $a^{SUSY}_{\mu}$ within the $2\sigma$ bound. In many other models, b --> s\gamma favors $a^{SUSY}_{\mu}$ smaller than either the $-1\sigma$ value ($26\times 10^{-10}$) or the central value ($42\times 10^{-10}$).
51543374
Unitarity violation of the CKM matrix in a nonuniversal gauge interaction model
We explore the unitarity violation of the Cabibbo-Kobayashi-Maskawa (CKM) matrix in the model where the third generation fermions are subjected to the separate SU(2){sub L} gauge interaction. With the recent LEP and SLAC linear collider (SLC) data at Z-pole and low-energy neutral current interaction data, the analysis on the parameter space of the model is updated, and the unitary violation is predicted under the constraint.