96 research outputs found
Brane-Anti-Brane Solution and SUSY Effective Potential in Five Dimensional Mirabelli-Peskin Model
A localized configuration is found in the 5D bulk-boundary theory on an
orbifold model of Mirabelli-Peskin. A bulk scalar and the extra
(fifth) component of the bulk vector constitute the configuration. \Ncal=1
SUSY is preserved. The effective potential of the SUSY theory is obtained using
the background field method. The vacuum is treated in a general way by allowing
its dependence on the extra coordinate. Taking into account the {\it
supersymmetric boundary condition}, the 1-loop full potential is obtained. The
scalar-loop contribution to the Casimir energy is also obtained. Especially we
find a {\it new} type which depends on the brane configuration parameters
besides the periodicity parameter.Comment: 14 pages, 4 figures, Some points are improve
Quantum Dynamics of a Bulk-Boundary System
The quantum dynamics of a bulk-boundary theory is closely examined by the use
of the background field method. As an example we take the Mirabelli-Peskin
model, which is composed of 5D super Yang-Mills (bulk) and 4D Wess-Zumino
(boundary). Singular interaction terms play an important role of canceling the
divergences coming from the KK-mode sum. Some new regularization of the
momentum integral is proposed. An interesting background configuration of
scalar fields is found. It is a localized solution of the field equation. In
this process of the vacuum search, we present a new treatment of the vacuum
with respect to the extra coordinate. The "supersymmetric" effective potential
is obtained at the 1-loop full (w.r.t. the coupling) level. This is the
bulk-boundary generalization of the Coleman-Weinberg's case. Renormalization
group analysis is done where the correct 4d result is reproduced. The Casimir
energy is calculated and is compared with the case of the Kaluza-Klein model.Comment: 57 pages,10 figures, final version
Transconjunctival Levator Aponeurosis Advancement without Resection of Müller’s Muscle in Aponeurotic Ptosis Repair
The transconjunctival levator aponeurosis advancement without resection of Müller’s muscle enables repair of aponeurotic ptosis without the need for surgical exposure through a skin incision. This technique may be preferred by many patients who are reluctant to undergo ptosis surgery because of the possible skin scar and who do not present with excessive upper eyelid laxity. A successful outcome requires careful patients' selection, familiarity with the surgical anatomy of the everted eyelid, as well as with the possible complications. Special consideration should be given to factors such as determining the degree of aponeurosis advancement to accord with the height of the eyelid during surgery and to creating the desired shape and size of the “double eyelid” in Asians. From our experience, this surgical technique is effective in correcting levator aponeurotic ptosis and contributes to a quick recovery of the normal anatomy and function of the eyelid. This method should therefore be added to the arsenal of techniques for blepharoptosis repair
A Bulk Effect to SUSY Effective Potential in a 5D Super-Yang-Mills Model
Supersymmetric effective potential of a 5D super-Yang-Mills model
compactified on , i.e., on an interval of extra dimension, is
estimated at the 1-loop level by the auxiliary field tadpole method. For the
sake of infinite towers of Kaluza-Klein excitation modes of bulk fields
involved in the tadpoles, there arises a definite bulk effect of linear growth
of the effective potential along with the cutoff {\mit\Lambda} which is
greatly suppressed by to produce finite contributions. The minimization of
the effective potential incorporating the tree potential and a Fayet-Iliopoulos
-term reveals an interesting case that the size of is stabilized at a
length corresponding to an intermediate mass scale GeV.Comment: 15 pages, 2 figure
A New Mechanism for Radius Stabilization in Warped Supersymmetry
A new mechanism for the radius stabilization is proposed in a 5D
super-Yang-Mills model in the warped background of . Dominant 1-loop
contribution to the supersymmetric 4D effective potential is estimated to
depend on the radion. The minimization of the effective potential incorporating
the tree potential and a Fayet-Iliopoulos -term for the gauge group U(1)
reveals an interesting case that the radius is stabilized at a length
corresponding to an intermediate mass scale GeV.Comment: 13 pages, 4 figure
Reshaping the eyebrow by follicular unit transplantation from excised eyebrow in extended infrabrow excision blepharoplasty
Severe anterior uveitis associated with idiopathic dacryoadenitis in diabetes mellitus patient
A 38-year-old woman with diabetes mellitus complained of acute visual loss in the left eye (20/200) and swollen left upper eyelid. Slit lamp examination of the left eye revealed ciliary injection, posterior synechia iritis, numerous inflammatory cells, and fibrin exudates in the anterior chamber. T1-weighted enhanced magnetic resonance imaging demonstrated left lacrimal gland enhancement with inflammatory spread to the left anterior ocular segment. Blood examination showed increased blood sugar but the other components were within normal limits. The patient was treated with steroid pulse therapy (methylprednisolone 1 g/day × 3 days) under a blood sugar control regimen in consultation with an endocrinologist, after which additional peribulbar injection of triamcinolone acetonide (40 mg) was performed. Resolution of the anterior uveitis and the dacryoadenitis was obtained after 2 months and there was no recurrence 1 year after the therapy. This is a rare case of severe anterior uveitis caused by idiopathic dacryoadenitis in a patient with diabetes mellitus
The importance of rim removal in deep lateral orbital wall decompression
Purpose: To evaluate the surgical outcome of deep lateral orbital decompression with or without rim removal. Design: Retrospective case series. Methods: Thirty-two patients (47 orbits) with Graves’ orbitopathy who underwent simple deep lateral decompression or balanced lateral plus medial decompression. Of the 14 patients (24 orbits) who underwent simple deep lateral decompression, 8 (13 orbits) had temporary rim removal and in 6 (11 orbits) the rim was left intact. Of the 18 patients (23 orbits) who underwent a balanced decompression, 7 (9 orbits) had temporary rim removal and in 11 (14 orbits) the rim was left intact. The amount of postoperative reduction in proptosis was compared among these four groups. Results: The average reduction in proptosis in the simple deep lateral decompression group was 5.73 mm (range: 4.0–8.0 mm) in the rim removal group and 4.09 mm (range: 2.5–6.0 mm) in the intact rim group (P = 0.005). The average reduction in proptosis in the balanced decompression group was 6.39 mm (range: 5.0–8.5 mm) in the rim removal group and 5.07 mm (range: 3.0–8.0 mm) in the intact rim group (P = 0.039). There was no statistically significant difference in proptosis reduction between the simple deep lateral decompression with rim removal group and the balanced decompression with an intact rim group (P = 0.220). Conclusion: The rim removal approach allows a more effective decompression than the intact rim approach. Simple deep lateral decompression with rim removal approach has a similar effect to balanced decompression through an intact rim.Kakizaki H, Takahashi Y, Ichinose A, Iwaki M, Selva D and Leibovitch
Phase structure of gauge theories for frustrated antiferromagnets in two dimensions
In this paper, we study phase structure of lattice gauge theories that
appear as an effective field theory describing low-energy properties of
frustrated antiferromagnets in two dimensions. Spin operators are expressed in
terms of Schwinger bosons, and an emergent U(1) gauge symmetry reduces to a
gauge symmetry as a result of condensation of a bilinear operator of the
Schwinger boson describing a short-range spiral order. We investigated the
phase structure of the gauge theories by means of the Monte-Carlo simulations,
and found that there exist three phases, phase with a long-range spiral order,
a dimer state, and a spin liquid with deconfined spinons. Detailed phase
structure and properties of phase transitions depend on details of the models.Comment: 11 pages, 27 figures, Version to be published in Phys.Rev.
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