118918211
Tales of D0 on D6 branes: matrix mechanics of identical particles
Abstract We investigate a class of matrix model which describes the dynamics of identical particles in even-dimensional space. We show that the degrees of freedom after some constraints are implemented is proportional to particle number and consist of those for positions and internal degrees. The particle dynamics is given by the metric on the smooth moduli space. The moduli space metric for two particles is found. The size of tightly packed N particles grows like N . Our matrix model is related to the matrix model for fractional quantum Hall effect, the ADHM formalism of U (1) instantons on noncommutative space, and supersymmetric D0 branes on D6 branes with nonzero B-field in type IIA theory.
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.
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.
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.
8741649
Topological Twisting of Multiple M2-brane Theory
Bagger-Lambert-Gustavsson theory with infinite dimensional gauge group has been suggested to describe M5-brane as a condensation of multiple M2-branes. Here we perform a topological twisting of the Bagger-Lambert-Gustavsson theory. The original SO(8) R-symmetry is broken to SO(3) × SO(5), where the former may be interpreted as a diagonal subgroup of the Euclidean M5-brane world-volume symmetry SO(6), while the latter is the isometry of the transverse five directions. Accordingly the resulting action contains an one-form and five scalars as for the bosonic dynamical fields. We further lift the action to a generic curved three manifold. In order to make sure the genuine topological invariance, we construct an off-shell supersymmetric formalism such that the scalar supersymmetry transformations are nilpotent strictly off-shell and independent of the metric of the three manifold. The one loop partition function around a trivial background yields the Ray-Singer torsion. The BPS equation involves an M2-brane charge density given by a Nambu-Goto action defined in an internal three-manifold.
117725824
Dynamical Evolution and Particle Production in Relativistic Nuclear Collisions
We present an overview of the different stages in the dynamical evolution of relativistic nuclear collisions, from the entropy generating initial pre-equilibrium stage through the hydrodynamic expansion phase to particle freeze-out. We discuss the various theoretical models which have been applied to these different stages, and compare their predictions with the recent results from heavy-ion experiments at CERN and Brookhaven. Particular attention is given to the possible formation and subsequent hadronization of a quark-gluon plasma in these collisions. The observed strange particle abundancies are interpreted as an indication for chemical equilibration in nuclear collisions, and the particle momentum spectra are analyzed for signs of collective expansion flow.
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.
119361427
Exploring the charged Higgs bosons in the left-right symmetric model
We explore constraints on the charged Higgs sector in the left-right symmetric model from the present experimental data. Because of the different Yukawa structure, the allowed parameter space of the charged Higgs boson in the LR model is different from that of the two Higgs doublet model. We find that the constraint from t{yields}bH{sup {+-}} decay at Tevatron is most significant, while B{yields}{tau}{nu} decay could provide no constraint on the LR model. Bounds from e{sup -}e{sup +}{yields}H{sup -}H{sup +} process at LEP are similar to those in the two Higgs doublet model.
118416809
A like-sign dimuon charge asymmetry at tevatron induced by anomalous top quark couplings
We show that the recently measured 3.9 σ deviations of the charge asymmetry of like-sign dimuon events from the standard model prediction by the D0 collaboration at Tevatron can be explained by introducing the anomalous right-handed top quark couplings. A combined analysis with the $$B_s - \bar B_s$$ and the $$B_d - \bar B_d$$ mixings, B → Xsγ decays and the time-dependent CP asymmetry in B → φK decays has been performed. The anomalous tsW couplings are preferred to explain the dimuon charge asymmetry together with other CP violating observables.