18,821 research outputs found
The Quark Flavor Violating Higgs Decay in the MSSM
We study the quark flavor violating Higgs-boson decay in the Minimal Supersymmetric Standard Model (MSSM). The decay is
analyzed first in a model independent, and in a second step in the minimal
flavor violationg (MFV) Constrained MSSM. The experimental constraints from
-Physics observables (BPO) and electroweak precision observables (EWPO) are
also calculated and imposed on the parameter space. It is shown that in some
cases the EWPO restrict the flavor violating parameter space stronger than the
BPO. In the model independent analysis values of can be
found for . In the MFV CMSSM such
results can only be obtained in very restricted parts of the parameter space.
The results show that it is not excluded to observe the decay in the MSSM at future colliders.Comment: arXiv admin note: text overlap with arXiv:1501.02258; text overlap
with arXiv:hep-ph/9909325 by other author
LabelTranslator: A Tool to Automatically Localize an Ontology
This demo proposal briefly presents LabelTranslator, a system that suggests translations of ontology labels, with the purpose of localizing ontologies. LabelTranslator takes as input an ontology whose labels are described in a source natural language and obtains the most probable translation of each ontology label into a target natural language.Our main contribution is the automatization of this process, which reduces human efforts to localize manually the ontology
Higgs masses and Electroweak Precision Observables in the Lepton-Flavor-Violating MSSM
We study the effects of Lepton Flavor Violation (LFV) in the scalar lepton
sector of the MSSM on precision observables such as the W-boson mass and the
effective weak leptonic mixing angle, and on the Higgs-boson mass predictions.
The slepton mass matrices are parameterized in a model-independent way by a
complete set of dimensionless parameters which we constrain through LFV decay
processes and the precision observables. We find regions where both conditions
are similarly constraining. The necessary prerequisites for the calculation
have been added to FeynArts and FormCalc and are thus publicly available for
further studies. The obtained results are available in FeynHiggs.Comment: LaTeX, 30 page
Thermal van der Waals Interaction between Graphene Layers
The van de Waals interaction between two graphene sheets is studied at finite
temperatures. Graphene's thermal length controls
the force versus distance as a crossover from the zero temperature
results for , to a linear-in-temperature, universal regime for
. The large separation regime is shown to be a consequence of the
classical behavior of graphene's plasmons at finite temperature. Retardation
effects are largely irrelevant, both in the zero and finite temperature
regimes. Thermal effects should be noticeable in the van de Waals interaction
already for distances of tens of nanometers at room temperature.Comment: enlarged version, 9 pages, 4 figures, updated reference
KIC 9821622: An interesting lithium-rich giant in the Kepler field
We report the discovery of a new exceptional young lithium-rich giant, KIC
9821622, in the \textit{Kepler} field that exhibits an unusually large
enhancement of , Fe-peak, and \textit{r}-process elements. From
high-resolution spectra obtained with GRACES at Gemini North, we derived
fundamental parameters and detailed chemical abundances of 23 elements from
equivalent widths and synthesis analysis. By combining atmospheric stellar
parameters with available asteroseismic data, we obtained the stellar mass,
radius, and age. The data analysis reveals that KIC 9821622 is a Li-rich
(A(Li) = 1.80 0.2) intermediate-mass giant star ( = 1.64
) located at the red giant branch near the luminosity bump. We find
unexpectedly elevated abundances of Fe-peak and \textit{r}-process elements. In
addition, as previously reported, we find that this is a young star (2.37 Gyr)
with unusually high abundances of -elements ([/Fe] = 0.31). The
evolutionary status of KIC 9821622 suggests that its Li-rich nature is the
result of internal fresh Li that is synthesized through the Cameron-Fowler
mechanism near the luminosity bump. However, its peculiar enhancement of
, Fe-peak, and \textit{r}-process elements opens the possibility of
external contamination by material enriched by a supernova explosion. Although
it is less likely, planet accretion cannot be ruled out.Comment: Letter, 6 pages, 3 figures, Accepted for publication in A&A. - Some
language editing include
Evidence of Non-Markovian Behavior in the Process of Bank Rating Migrations
This paper estimates transition matrices for the ratings on financial institutions, using an unusually informative data set. We show that the process of rating migration exhibits significant non-Markovian behavior, in the sense that the transition intensiFinancial institutions, macroeconomic variables, capitalization, supervision, transition intensities
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