44,474 research outputs found
750 GeV Diphoton Resonance from Singlets in an Exceptional Supersymmetric Standard Model
The 750-760 GeV diphoton resonance may be identified as one or two scalars
and/or one or two pseudoscalars contained in the two singlet superfields
S_{1,2} arising from the three 27-dimensional representations of E_6 . The
three 27s also contain three copies of colour-triplet charge \mp 1/3
vector-like fermions D,\bar{D} and two copies of charged inert Higgsinos
\tilde{H}^{+},\tilde{H}^{-} to which the singlets S_{1,2} may couple. We
propose a variant of the E_6SSM where the third singlet S_3 breaks a gauged
U(1)_N above the TeV scale, predicting Z'_N, D,\bar{D},
\tilde{H}^{+},\tilde{H}^{-} at LHC Run 2, leaving the two lighter singlets
S_{1,2} with masses around 750 GeV. We calculate the branching ratios and
cross-sections for the two scalar and two pseudoscalar states associated with
the S_{1,2} singlets, including possible degeneracies and maximal mixing,
subject to the constraint that their couplings remain perturbative up to the
unification scale.Comment: 22 pages, 4 figures, some minor changes to the text, references adde
Spectrum of Higgs particles in the Exceptional Supersymmetric Standard Model
We discuss the spectrum of Higgs bosons in the framework of the exceptional
supersymmetric standard model. The presence of a and exotic particles
predicted by the exceptional SUSY model allows the lightest Higgs particle to
be significantly heavier than in the MSSM and NMSSM. When the mass of the
lightest Higgs boson is larger than the heaviest scalar,
pseudoscalar and charged Higgs states lie beyond the range.Comment: Presented at 12th Lomonosov Conference on Elementary Particle
Physics, Moscow, Russia, 25-31 August 2005, some minor changes to the text,
references adde
Turbulence simulation mechanization for Space Shuttle Orbiter dynamics and control studies
The current version of the NASA turbulent simulation model in the form of a digital computer program, TBMOD, is described. The logic of the program is discussed and all inputs and outputs are defined. An alternate method of shear simulation suitable for incorporation into the model is presented. The simulation is based on a von Karman spectrum and the assumption of isotropy. The resulting spectral density functions for the shear model are included
Determination of constant-volume balloon capabilities for aeronautical research
The proper application of constant-volume balloons (CVB) for measurement of atmospheric phenomena was determined. And with the proper interpretation of the resulting data. A literature survey covering 176 references is included. the governing equations describing the three-dimensional motion of a CVB immersed in a flow field are developed. The flowfield model is periodic, three-dimensional, and nonhomogeneous, with mean translational motion. The balloon motion and flow field equations are cast into dimensionless form for greater generality, and certain significant dimensionless groups are identified. An alternate treatment of the balloon motion, based on first-order perturbation analysis, is also presented. A description of the digital computer program, BALLOON, used for numerically integrating the governing equations is provided
LHC Signatures of the Constrained Exceptional Supersymmetric Standard Model
We discuss two striking Large Hadron Collider (LHC) signatures of the
constrained version of the exceptional supersymmetric standard model (cE6SSM),
based on a universal high energy soft scalar mass m_0, soft trilinear coupling
A_0 and soft gaugino mass M_{1/2}. The first signature we discuss is that of
light exotic colour triplet charge 1/3 fermions, which we refer to as
D-fermions. We calculate the LHC production cross section of D-fermions, and
discuss their decay patterns. Secondly we discuss the E6 type U(1)_N spin-1 Z'
gauge boson and show how it may decay into exotic states, increasing its width
and modifying the line shape of the dilepton final state. We illustrate these
features using two representative cE6SSM benchmark points, including an "early
LHC discovery" point, giving the Feynman rules and numerical values for the
relevant couplings in order to facilitate further studies.Comment: 30 pages, 5 figures, corrections to figure caption
Discovery Prospects for NMSSM Higgs Bosons at the High-Energy Large Hadron Collider
We investigate the discovery prospects for NMSSM Higgs bosons during the
13~TeV run of the LHC. While one of the neutral Higgs bosons is demanded to
have a mass around 125~GeV and Standard Model (SM)-like properties, there can
be substantially lighter, nearby or heavier Higgs bosons, that have not been
excluded yet by LEP, Tevatron or the 8~TeV run of the LHC. The challenge
consists in discovering the whole NMSSM Higgs mass spectrum. We present the
rates for production and subsequent decay of the neutral NMSSM Higgs bosons in
the most promising final states and discuss their possible discovery. The
prospects for pinning down the Higgs sector of the Natural NMSSM will be
analysed taking into account alternative search channels. We give a series of
benchmark scenarios compatible with the experimental constraints, that feature
Higgs-to-Higgs decays and entail (exotic) signatures with multi-fermion and/or
multi-photon final states. These decay chains furthermore give access to the
trilinear Higgs self-couplings. We briefly discuss the possibility of
exploiting coupling sum rules in case not all the NMSSM Higgs bosons are
discovered
Master/slave manipulator system
System capabilities are equivalent to mobility, dexterity, and strength of human arm. Arrangement of torque motor, harmonic drive, and potentiometer combination allows all power and control leads to pass through center of slave with position-transducer arrangement of master, and "stovepipe joint" is incorporated for manipulator applications
Anthropomorphic master/slave manipulator system
An anthropomorphic master/slave manipulator system including master arm apparatus with a plurality of master tubular articulated portions is outlined. Objectives of this investion were to provide a system that accurately and smoothly simulates human limb movement at a remote location. The system has a high frequency response, a high structural stiffness and a design that protects the components of the slave mechanism. Simulation of human movements is possible in outer space, underwater, and in a hazardous environment such as in a high radiation area. The equivalent ability, dexterity, and strength of a human arm are simulated
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