1,625 research outputs found
Partial resolution of complex cones over Fano
In our recent paper arXiv:1108.2387, we systematized inverse algorithm to
obtain quiver gauge theory living on the M2-branes probing the singularities of
special kind of Calabi-Yau four-folds which were complex cones over toric Fano
, , , . These quiver gauge
theories cannot be given a dimer tiling presentation. We use the method of
partial resolution to show that the toric data of and Fano
can be embedded inside the toric data of Fano
theories. This method indirectly justfies that the two node quiver Chern-Simons
theories corresponding to , Fano and their
orbifolds can be obtained by higgsing matter fields of the three node parent
quiver corresponding to Fano , , ,
three-folds.Comment: 22 pages, 8 figure
Is toric duality a Seiberg-like duality in (2+1)-d ?
We show that not all dimensional toric phases are Seiberg-like duals.
Particularly, we work out superconformal indices for the toric phases of Fanos
, and . We find that the indices for
the two toric phases of Fano do not match, which implies that
they are not Seiberg-like duals. We also take the route of acting Seiberg-like
duality transformation on toric quiver Chern-Simons theories to obtain dual
quivers. We study two examples and show that Seiberg-like dual quivers are not
always toric quivers.Comment: 21 pages, 7 figures, to be published in JHE
Light Weakly Coupled Axial Forces: Models, Constraints, and Projections
We investigate the landscape of constraints on MeV-GeV scale, hidden U(1)
forces with nonzero axial-vector couplings to Standard Model fermions. While
the purely vector-coupled dark photon, which may arise from kinetic mixing, is
a well-motivated scenario, several MeV-scale anomalies motivate a theory with
axial couplings which can be UV-completed consistent with Standard Model gauge
invariance. Moreover, existing constraints on dark photons depend on products
of various combinations of axial and vector couplings, making it difficult to
isolate the effects of axial couplings for particular flavors of SM fermions.
We present a representative renormalizable, UV-complete model of a dark photon
with adjustable axial and vector couplings, discuss its general features, and
show how some UV constraints may be relaxed in a model with nonrenormalizable
Yukawa couplings at the expense of fine-tuning. We survey the existing
parameter space and the projected reach of planned experiments, briefly
commenting on the relevance of the allowed parameter space to low-energy
anomalies in pi^0 and 8-Be* decay.Comment: 30 pages, 5 figures, 4 tables. v2: format changed to JHEP, typos
fixed, references adde
SPECS - an embedded platform, speech-driven environmental control system evaluated in a virtuous circle framework
Entanglement on linked boundaries in Chern-Simons theory with generic gauge groups
We study the entanglement for a state on linked torus boundaries in
Chern-Simons theory with a generic gauge group and present the asymptotic
bounds of R\'enyi entropy at two different limits: (i) large Chern-Simons
coupling , and (ii) large rank of the gauge group. These results show
that the R\'enyi entropies cannot diverge faster than and ,
respectively. We focus on torus links with topological linking number
. The R\'enyi entropy for these links shows a periodic structure in and
vanishes whenever , where the integer
is a function of coupling and rank . We highlight that the
refined Chern-Simons link invariants can remove such a periodic structure in
.Comment: 31 pages, 5 figure
Type-II see-saw at collider
Doubly-charged Higgs bosons have extensively been searched at the LHC. In
this work, we study the sensitivity reach of the doubly-charged scalar
() in muon collider for the well-known Type-II seesaw scenario.
First, we perform a cut-based analysis to predict the discovery prospect in the
muon collider operating with 3 TeV center of mass energy. In addition to this,
we have also performed a multivariate analysis and compare the cut-based result
with the result obtained from the multivariate analysis. We find that the
cut-based analysis is more significant as compared to the multivariate analysis
in the large doubly-charged scalar mass region. We predict that a
doubly-charged scalar mass, , upto 1450 GeV can be probed with
significance for center of mass TeV and integrated
luminosity
Order and Disorder in AKLT Antiferromagnets in Three Dimensions
The models constructed by Affleck, Kennedy, Lieb, and Tasaki describe a
family of quantum antiferromagnets on arbitrary lattices, where the local spin
S is an integer multiple M of half the lattice coordination number. The equal
time quantum correlations in their ground states may be computed as finite
temperature correlations of a classical O(3) model on the same lattice, where
the temperature is given by T=1/M. In dimensions d=1 and d=2 this mapping
implies that all AKLT states are quantum disordered. We consider AKLT states in
d=3 where the nature of the AKLT states is now a question of detail depending
upon the choice of lattice and spin; for sufficiently large S some form of Neel
order is almost inevitable. On the unfrustrated cubic lattice, we find that all
AKLT states are ordered while for the unfrustrated diamond lattice the minimal
S=2 state is disordered while all other states are ordered. On the frustrated
pyrochlore lattice, we find (conservatively) that several states starting with
the minimal S=3 state are disordered. The disordered AKLT models we report here
are a significant addition to the catalog of magnetic Hamiltonians in d=3 with
ground states known to lack order on account of strong quantum fluctuations.Comment: 7 pages, 2 figure
Persistent Pain after Cholecystectomy, When Defined Indications for Operation are Used
Introduction: The overall prevalence of gallstones in adults is about 10% of whom approximately 1 to 2% become symptomatic. The accurate differentiation of gallstone induced biliary colic from other abdominal disease processes is the most crucial step in the successful management of gallstone disease. Persistent pain or the so-called “Post –cholecystectomy syndrome†varies in frequency between 6 and 47 percent.Aims and Objectives: To study the frequency of persistent pain after cholecystectomy, when defined indications for the operation were used.Materials and Methods: This is a prospective study carried out in 70 patients in whom the indications for cholecystectomy were defined. All patients were subjected to cholecystectomy. All the patients received a self – administered questionnaire before cholecystectomy about specific food intolerance, acid regurgitation, heartburn, nausea, vomiting, and sensation of bloating in relation to meals during the previous 3 months. The location of abdominal pain was noted and the intensity of pain was indicated on the visual Analogue Scale (VAS). The patients were followed up at 1,3 and 6 months after the cholecystectomy and the same symptom questionnaire was administered to the patients at every visit.Results - At one month follow up, out of 37 patients who experienced abdominal pain with typical location before surgery, 32 reported total remission of pain (86.4%) whereas out of 15 patients who had vague abdominal pain before surgery, only 3 reported relief of pain (20%). At 6 months follow up out of 22 patients with localized preoperative pain, 20 reported relief (90.0%). Out of 12 patients with vague preoperative pain, 7 patients reported relief of pain (58.3%). The average VAS score at 1 month follow up was 2.5 for patients with preoperative localized pain and 4.5 for those who presented with vague pain preoperatively. The score was 1 and 3 respectively at 6 months follow up.Conclusion: The defined indications for elective cholecystectomy along with the questionnaire indicates the frequency and location of preoperative abdominal pain are useful in minimizing the frequency of persistent pain after cholecystectomy. The frequency of persistent abdominal pain after Cholecystectomy is low in patients with preoperative typical localized pain
CSIS: Cloud Service Identification System
To meet the need of the computational power, most of the users may go for a cloud based services for its scalability, flexibility and reliability. Cloud services have become an integral part of IT and analytical enterprises. Owing to increase in necessity of commercial cloud products being readily available, it has become extremely difficult for users to identify suitable cloud services. This paper proposes the recommender system precisely designed for the discovery of cloud services. Though there is an exponential increase in demand for cloud services, the amount of research done in this particular field is abysmal. Cloud Service Identification System (CSIS) crawls through Internet, identifies cloud services and stores them in a database. The user’s search query is processed and recommends cloud services accurately
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