6,502 research outputs found
The Higgs masses and explicit CP violation in the gluino-axion model
In this work, we adress the phenomenological consequences of explicit CP
violation on direct Higgs-boson searches at high energy colliders. Having a
restricted parameter space, we concentrate on the recently proposed
gluino-axion model, and investigate the CP violation capability of the model
subject to the recent experimental data. It is shown that the Higgs masses as
well as their CP compositions are quite sensitive to the supersymmetric CP
phases. The lightest Higgs is found to be nearly CP even to a good
approximation whilst the remaining two heavy scalars do not have definite CP
parities.Comment: 20 pp, 14 eps figs, title is changed, the manuscript is improved
using the latest experimental data, some figures and references adde
The effect of supersymmetric CP phases on Chargino-Pair Production via Drell-Yan Process at the LHC
We compute the rates for pp annihilation into chargino-pairs via Drell-Yan
process taking into account the effects of supersymmetric soft phases, at
proton-proton collider. In particular, the phase of the mu parameter gains
direct accessibility via the production of dissimilar charginos. The phases of
the trilinear soft masses do not have a significant effect on the cross
sections.Comment: 24 pages, 7 figure
Realistic Gluino Axion Model Consistent with Supersymmetry Breaking at the TeV Scale
The recently proposed model of using the dynamical phase of the gluino to
solve the strong CP problem is shown to admit a specific realization in terms
of fundamental singlet superfields, such that the breaking of supersymmetry
occurs only at the TeV scale, despite the large axion scale of 10^{9} to
10^{12} GeV. Phenomenological implications are discussed.Comment: 12 pp, 2 fig
The Constraints on CP Violating Phases in models with a dynamical gluino phase
We have analyzed the electric dipole moment and the Higgs mass constraints on
the supersymmetric model which offers dynamical solutions to the \mu and strong
CP problems. The trilinear coupling phases, and \tan\beta-|\mu| are strongly
correlated, particularly in the low-\tan\beta regime. Certain values of the
phases of the trilinear couplings are forbidden, whereas the CP violating phase
from the chargino sector is imprisoned to lie near a CP conserving point, by
the Higgs mass and electric dipole moment constraints.Comment: 19 pages, 11 eps fig
The CP properties of the lightest Higgs boson with sbottom effects
In the framework of the recently proposed gluino-axion model, using the
effective potential method and taking into account the top-stop as well as the
bottom-sbottom effects, we discuss the CP--properties of the lightest Higgs
boson, in particular its CP--odd composition, which can offer new opportunities
at collider searches. It is found that although the CP-odd composition of the
lightest Higgs increases slightly with the inclusion of the sbottom effects, it
never exceeds %0.17 for all values of the renormalization scale Q ranging from
top mass to TeV scaleComment: 24 pp, 12 eps fig
Renormalization Group Invariants in the MSSM and Its Extensions
We derive one-loop renormalization group (RG) invariant observables and
analyze their phenomenological implications in the MSSM and its \mu problem
solving extensions, U(1)' model and NMSSM. We show that there exist several RG
invariants in the gauge, Yukawa and soft-breaking sectors of each model. In
general, RG invariants are highly useful for projecting experimental data to
messenger scale, for revealing correlations among the model parameters, and for
probing the mechanism that breaks supersymmetry. The Yukawa couplings and
trilinear soft terms in U(1)' model and NMSSM do not form RG invariants though
there exist approximate invariants in low tan(beta). In the NMSSM, there are no
invariants that contain the Higgs mass-squareds. We provide a comparative
analysis of RG invariants in all three models and analyze their model-building
and phenomenological implications by a number of case studies.Comment: 32 pages, 5 tables; extended previous analysis to include U(1)'
models and NMSSM where a comparative discussion is give
Facial soft tissue changes after orthodontic treatment
Objectives: To successfully meet expectations on facial esthetics, it is important to understand normal craniofacial growth and the impact of orthodontic treatment thereon. To date, there have been few studies documenting changes in facial esthetics through photography. The objective of this study was to compare facial soft tissue esthetics beforeand after orthodontic treatment by means of photographic analysis.Materials and Methods: The 45 children were divided into 3 groups according to Anglefs classification: Groups I, II, and III comprised children with class I, II, and III malocclusion, respectively. Photographs were analyzed with a software. Twenty.one soft tissue landmarks were identified on profile and frontal photographs, ratios and angles were calculated. Results: For group I, there was no difference between pre. and post.treatment facial analysis. For group II, there were significant changes in 5 values. The most significant changes were observed for A-N-B and Al-Me/Ch-Me. For group III, we noted significant changes for 5 values. The most significant change was observed for N-Pn-Pog. Conclusion: There were significant changes in facial soft tissue esthetics after orthodontic treatment for class II and III cases. Changes in A.N.B and nose tip angle (N-Pn-Cm) were observed for class II and class III subjects.Key words: Aesthetics, photograph, soft tissu
Detection of species diversity of arbuscular mycorrhizal fungi (AMF) classic and molecular methods from the melon (Cucumis melo L.) plants in Van and its districts
Arbuscular-mycorhizal fungi (AMF) from melon plants grown in Van province, were studied by nested-PCR method to establish colonization ratio of related fungi in plants and to detect the fungi at species level. From 10 different locations, a total of 100 soil samples were taken from rhizosphere area of melon plants. It was also determined that 52% of these plants were colonized by arbuscular-mycorhizal fungi and were able to establish symbiotic relationship in variable ranges (4.5 to 37.8%) Glomus intraradices and Glomus mosseae were two identified AMF.Key words: Arbuscular-mycorhizal fungi (AMF), melon, Glomus intraradices, Glomus mosseae, Van
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