14,355 research outputs found
Higgs boson decays into {\gamma}{\gamma} and Z{\gamma} in the MSSM and BLSSM
We calculate Higgs decay rates into {\gamma}{\gamma} and Z{\gamma} in the
Minimal Supersymmetric Standard Model (MSSM) and (B-L) Supersymmetric Standard
Model (BLSSM) by allowing for contributions from light staus and charginos. We
show that sizable departures are possible from the SM predictions for the 125
GeV state and that they are testable during run 2 at the Large Hadron Collider.
Furthermore, we illustrate how a second light scalar Higgs signal in either or
both these decay modes can be accessed at the CERN machine rather promptly
within the BLSSM, a possibility instead precluded to the MSSM owing to the much
larger mass of its heavy scalar state.Comment: Plots slightly modified, no significant chang
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Multi-Nozzle Biopolymer Deposition for Freeform Fabrication of Tissue Constructs
Advanced freeform fabrication techniques have been recently used for the construction of tissue
scaffolds because of the process repeatability and capability of high accuracy in fabrication
resolution at the macro and micro scales. Among many applicable tissue scaffolding materials,
polymeric materials have unique properties in terms of the biocompatibility and degradation, and
have thus been widely utilized in tissue engineering applications. Hydrogels, such as alginate,
has been one of the most important polymer scaffolding materials because of its biocompatibility
and internal structure similarity to that of the extracellular matrix of many tissues, and its
relatively moderate processing. Three-dimensional deposition has been an entreating freeform
fabrication method of biopolymer and particularly hydrogel scaffolds because of its readiness to
deposit fluids at ambient temperatures. This paper presents a recent development of biopolymer
deposition based freeform fabrication for 3-diemnsinal tissue scaffolds. The system
configuration of multi-nozzles used in the deposition of sodium alginate solutions and Poly-?-
Caprolactone (PCL) are described. Studies on polymer deposition feasibility and structural
formability are conducted, and the preliminary results are presented.Mechanical Engineerin
Dark Matter Annihilation and the PAMELA, FERMI and ATIC Anomalies
If dark matter (DM) annihilation accounts for the tantalizing excess of
cosmic ray electron/positrons, as reported by the PAMELA, ATIC, HESS and FERMI
observatories, then the implied annihilation cross section must be relatively
large. This results, in the context of standard cosmological models, in very
small relic DM abundances that are incompatible with astrophysical
observations. We explore possible resolutions to this apparent conflict in
terms of non-standard cosmological scenarios; plausibly allowing for large
cross sections, while maintaining relic abundances in accord with current
observations.Comment: 13 pages, 3 figures; published for publication in Physical Review
Effect Of Non Dental Glass Fiber Orientation On Transverse Strength Of Dental Fiber Reinforced Composite
FRC is widely used in dentistry especially for dental bridges construction. E glass fiber is commonly used because it has good properties and good bonding with polymers. Its availability is limited and its price quite expensive in Indonesia. Non dental glass fiber is available in Indonesia with lower price. The aim of this research was to evaluate the effect of non dental glass fiber orientation on transverse strength of dental FRC. Non dental glass fiber (HJ, China) with two orientations (Roving and Woven roving), Flowable composite (CharmFil Flow, DenKist, Korea) , Silane coupling agent (Monobond S, Ivoclar Vivadent, Liechtenstein) and distilled water. 24 specimens of non dental glass FRC, divided into 2 groups. The specimens was immersed in water for 24 hours and 7 days. The data were analyzed by Independent sample T-test. T-test analysis showed that for transverse strength with 24 hours water immersion there was a significant difference between the two orientation groups (p 0.05). In conclusion: there was different transverse strength between roving and woven roving orientation in dental FRC
Flavour-dependent SUSY phases and CP asymmetry in B -> X_s gamma decays
We study the direct CP asymmetry in B -> X_s gamma decay in SUSY models with
non-universal A-terms. We show that the flavour-dependent phases of the
A-terms, unlike the flavour-independent ones, can give rise too large
contribution to the CP asymmetry while respecting the experimental bounds on
the branching ratio of B -> X_s gamma decay and the electric dipole moments of
the electron and neutron. The CP asymmetry of this decay is predicted to be
much larger than the standard model prediction in a wide region of the
parameter space. In particular, it can be of order 10-15% which can be
accessible at B factories.Comment: 4 pages, 2 figure
Supersymmetric Sum Rules In Minimal Superstring Unification
The Minimal superstring unification, assuming orbifold compactification,
provides interesting and rather detailed implications on physics at low energy.
The interesting feature of this model is that the masses of the spectrum are
related since all of them are functions of only two parameters: the goldstino
angle theta and the gravitino mass m_{3/2}. This fact will help us in studying
the modification of the supersymmetric magnetic moments sum rules which are
very sensitive to the supersymmetry breaking. We write these rules in case of
exact supersymmetry in a form close to the supersymmetric mass relations,
namely , where A_J is the anomalous magnetic
moment of the spin J particle. We show that the anomalous magnetic moments of
the W-boson and the gauginos can be written as functions of theta and m_{3/2}.
Then we obtain a modified version of the supersymmetric magnetic moment sum
rule in the context of the minimal superstring unification.Comment: Latex, 18 pages, 4 figure
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