4,027 research outputs found
Double Higgs peak in the minimal SUSY B-L model
Motivated by a excess recorded by the CMS experiment at the
LHC around a mass of order GeV in and
samples, we analyse the discovery potential of a second neutral Higgs boson in
the Supersymmetric extension of the Standard Model (BLSSM) at the CERN
machine. We confirm that a double Higgs peak structure can be generated in this
framework, with CP-even Higgs boson masses at GeV and GeV,
unlike the case of the Minimal Supersymmetric Standard Model (MSSM).Comment: 7 pages, 4 figures. Improved discussion of experimental dat
Computer program for the analysis of the cross flow in a radial inflow turbine scroll
A computer program was used to solve the governing of the potential flow in the cross sectional planes of a radial inflow turbine scroll. A list of the main program, the subroutines, and typical output example are included
Analysis of the cross flow in a radial inflow turbine scroll
Equations of motion were derived, and a computational procedure is presented, for determining the nonviscous flow characteristics in the cross-sectional planes of a curved channel due to continuous mass discharge or mass addition. An analysis was applied to the radial inflow turbine scroll to study the effects of scroll geometry and the through flow velocity profile on the flow behavior. The computed flow velocity component in the scroll cross-sectional plane, together with the through flow velocity profile which can be determined in a separate analysis, provide a complete description of the three dimensional flow in the scroll
Z'-induced Invisible Right-handed Sneutrino Decays at the LHC
The invisible signals of right-handed sneutrino decays originating from a Z'
are analysed at the Large Hadron Collider. The possibility of accessing these
events helps disentangling the B-L extension of Minimal Supersymmetric Standard
Model from more popular scenarios of Supersymmetry. We assess the scope of the
CERN machine in establishing the aforementioned signatures when accompanied by
mono-jet, single-photon or Z-radiation probes through sophisticated
signal-to-background simulations carried out in presence of parton shower,
hadronisation as well as detector effects. We find substantial sensitivity to
all such signals for standard luminosities at Run 2.Comment: 4 pages, 3 figure
Analysis of a diffusive effective mass model for nanowires
We propose in this paper to derive and analyze a self-consistent model
describing the diffusive transport in a nanowire. From a physical point of
view, it describes the electron transport in an ultra-scaled confined
structure, taking in account the interactions of charged particles with
phonons. The transport direction is assumed to be large compared to the wire
section and is described by a drift-diffusion equation including effective
quantities computed from a Bloch problem in the crystal lattice. The
electrostatic potential solves a Poisson equation where the particle density
couples on each energy band a two dimensional confinement density with the
monodimensional transport density given by the Boltzmann statistics. On the one
hand, we study the derivation of this Nanowire Drift-Diffusion Poisson model
from a kinetic level description. On the other hand, we present an existence
result for this model in a bounded domain
Transient neurologic symptoms following spinal anesthesia with isobaric mepivacaine: A decade of experience at Toronto Western Hospital
Background: Transient neurologic symptoms (TNSs) can be distressing for patients and providers following uneventful spinal anesthesia. Spinal mepivacaine may be less commonly associated with TNS than lidocaine; however, reported rates of TNS with intrathecal mepivacaine vary considerably. Materials and Methods: We conducted a retrospective cohort study reviewing the internal medical records of surgical patients who underwent mepivacaine spinal anesthesia at Toronto Western Hospital over the last decade to determine the rate of TNS. We defined TNS as new onset back pain that radiated to the buttocks or legs bilaterally. Results: We found one documented occurrence of TNS among a total of 679 mepivacaine spinal anesthetics (0.14%; CI: 0.02–1.04%) that were performed in 654 patients. Conclusion: Our retrospective data suggest that the rate of TNS associated with mepivacaine spinal anesthesia is lower than that previously reported in the literature
Mechanical relations between conductive and radiative heat transfer
We present a general nonequilibrium Green's function formalism for modeling
heat transfer in systems characterized by linear response that establishes the
formal algebraic relationships between phonon and radiative conduction, and
reveals how upper bounds for the former can also be applied to the latter. We
also propose an extension of this formalism to treat systems susceptible to the
interplay of conductive and radiative heat transfer, which becomes relevant in
atomic systems and at nanometric and smaller separations where theoretical
descriptions which treat each phenomenon separately may be insufficient. We
illustrate the need for such coupled descriptions by providing predictions for
a low-dimensional system of carbyne wires in which the total heat transfer can
differ from the sum of its radiative and conductive contributions. Our
framework has ramifications for understanding heat transfer between large
bodies that may approach direct contact with each other or that may be coupled
by atomic, molecular, or interfacial film junctions.Comment: 16 pages, 2 figures, 1 table, 2 appendice
Controlling local thermal states in classical many-body systems
The process of thermalization in many-body systems is driven by complex
interactions among sub-systems and with the surrounding environment. Here we
lay the theoretical foundations for the active control of local thermal states
in arbitrary non-reciprocal systems close to their equilibrium state. In
particular we describe how to (i) force some part of the system to evolve
according to a prescribed law during the relaxation process (i.e. thermal
targeting probem), (ii) insulate some elements from the rest of the system or
(iii) synchronize their evolution during the relaxation process. We also derive
the general conditions a system must fulfill in order that some parts relax
toward a minimal temperature with a minimum energetic cost or relax toward a
prescribed temperature with a minimum time. Finally, we consider several
representative examples in the context of systems exchanging heat radiatively
Structural and Morphological Study of PbS:ZnO Nanowires Films Deposited Using Thermal Evaporation Method
We obtained ZnO Nanowires films deposited on two types of substrate (Si (100) and glass) with 12 wt % PbS as dopant by simple thermal evaporation technique. High Resolution Transmission Electron Microscopy (HRTEM) and Energy-dispersive X-ray spectroscopy(EDX) images have confirmed the formation of ZnO Nanowires (NWs). EDX technique was used to investigate the elements content (standard analysis and mapping modes). Morphology and thickness of the films were investigated from surface and cross section of the films via Scanning Electron Microscopy (SEM) images. The Raman, photoluminescence (PL) and X-ray Diffraction (XRD) have confirmed the hexagonal phase structure of the ZnO Nanowires, which appeared to be very fine and their diameters were less than 40 nm and their lengths were of several micrometers using SEM and HRTEM. The effect of PbS as dopant on the growth of ZnO Nanowires as well as on the morphology for two substrates was investigated and compared. These Nanowires films could be applied in several fields. Mapping -EDX has confirmed the stoichiometry of prepared films. Finally, the structure (phase) was verified by different characterization techniques. The optoelectronic application of Nanostructures film will be study later
- …