43,541 research outputs found
Static Monopoles and Their Anti-Configurations
Recently, we have reported on the existence of some monopoles, multimonopole,
and antimonopoles configurations. In this paper we would like to present more
monopoles, multimonopole, and antimonopoles configurations of the magnetic
ansatz of Ref.\cite{kn:9} when the parameters and of the solutions
takes different serial values. These exact solutions are a different kind of
BPS solution. They satisfy the first order Bogomol'nyi equation but possess
infinite energy. They can have radial, axial, or rotational symmetry about the
z-axis. We classified these serial solutions as (i) the multimonopole at the
origin; (ii) the finitely separated 1-monopoles; (iii) the screening solutions
of multimonopole and (iv) the axially symmetric monopole solutions. We also
give a construction of their anti-configurations with all the magnetic charges
of poles in the configurations reversed. Half-integer topological magnetic
charge multimonopole also exist in some of these series of solutions.Comment: 20 pages with 4 figure
Half-Monopole and Multimonopole
We would like to present some exact SU(2) Yang-Mills-Higgs monopole solutions
of half-integer topological charge. These solutions can be just an isolated
half-monopole or a multimonopole with topological magnetic charge, ,
where is a natural number. These static monopole solutions satisfy the
first order Bogomol'nyi equations. The axially symmetric one-half monopole
gauge potentials possess a Dirac-like string singularity along the negative
z-axis. The multimonopole gauge potentials are also singular along the z-axis
and possess only mirror symmetries.Comment: 12 pages and 4 figures; typos corrected, reference adde
Odontoameloblastoma with extensive chondroid matrix deposition in a guinea pig
Odontoameloblastomas (previously incorporated within ameloblastic odontomas) are matrix-producing odontogenic mixed tumors and are closely related in histologic appearance to the 2 other types of matrix-producing odontogenic mixed tumors: odontomas and ameloblastic fibro-odontomas. The presence or absence of intralesional, induced non-neoplastic tissue must be accounted for in the diagnosis. Herein we describe a naturally occurring odontoameloblastoma with extensive chondroid cementum deposition in a guinea pig (Cavia porcellus). Microscopically, the mass featured palisading neoplastic odontogenic epithelium closely apposed to ribbons and rings of a pink dental matrix (dentinoid), alongside extensive sheets and aggregates of chondroid cementum. The final diagnosis was an odontoameloblastoma given the abundance of odontogenic epithelium in association with dentinoid but a paucity of pulp ectomesenchyme. Chondroid cementum is an expected anatomical feature of cavies, and its presence within the odontoameloblastoma was interpreted as a response of the ectomesenchyme of the dental follicle to the described neoplasm. Our case illustrates the inductive capabilities of odontoameloblastomas while highlighting species-specific anatomy that has resulted in a histologic appearance unique to cavies and provides imaging and histologic data to aid diagnosis of these challenging lesions
Dyons of One Half Monopole Charge
We would like to present some exact SU(2) Yang-Mills-Higgs dyon solutions of
one half monopole charge. These static dyon solutions satisfy the first order
Bogomol'nyi equations and are characterized by a parameter, . They are
axially symmetric. The gauge potentials and the electromagnetic fields possess
a string singularity along the negative z-axis and hence they possess infinite
energy density along the line singularity. However the net electric charges of
these dyons which varies with the parameter are finite.Comment: 16 pages, 7 figure
Generalized Jacobi Elliptic One-Monopole - Type A
We present new classical generalized one-monopole solution of the SU(2)
Yang-Mills-Higgs theory with the Higgs field in the adjoint representation. We
show that this generalized solution with -winding number and
-winding number is an axially symmetric Jacobi elliptic
generalization of the 't Hooft-Polyakov one-monopole. We construct this axially
symmetric one-monopole solution by generalizing the large distance asymptotic
solution of the 't Hooft-Polyakov one-monopole to the Jacobi elliptic functions
and solving the second order equations of motion numerically when the Higgs
potential is vanishing and non vanishing. These solutions are regular non-BPS
finite energy solutions.Comment: 17 pages, 5 figure
High p_T Triggered Delta-eta,Delta-phi Correlations over a Broad Range in Delta-eta
The first measurement of pseudorapidity (Delta-eta) and azimuthal angle
(Delta-phi) correlations between high transverse momentum charged hadrons (p_T
> 2.5 GeV/c) and all associated particles is presented at both short- (small
Delta-eta) and long-range (large Delta-eta) over a continuous pseudorapidity
acceptance (-4<Delta-eta<2). In these proceedings, the various near- and
away-side features of the correlation structure are discussed as a function of
centrality in Au+Au collisions measured by PHOBOS at sqrt(s_NN)=200 GeV. In
particular, this measurement allows a much more complete determination of the
longitudinal extent of the ridge structure, first observed by the STAR
collaboration over a limited eta range. In central collisions the ridge
persists to at least Delta-eta=4, diminishing in magnitude as collisions become
more peripheral until it disappears around Npart=80.Comment: 5 pages, 2 figures, presented at the 20th International Conference on
Ultra-Relativistic Nucleus-Nucleus Collisions, "Quark Matter 2008", Jaipur,
India, February 4-10, 2008. Full author list included and typo corrected in
equation
Evaluation of tantalum for mercury containment in the SNAP-8 boiler
Corrosion testing of tantalum for mercury containment in SNAP 8 boile
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