3,556 research outputs found
Like-sign Di-lepton Signals in Higgsless Models at the LHC
We study the potential LHC discovery of the Z1 KK gauge boson unitarizing
longitudinal W+W- scattering amplitude. In particular, we explore the decay
mode Z1->t tbar along with Z1-> W+W- without specifying the branching
fractions. We propose to exploit the associated production pp-> W Z1, and
select the final state of like-sign dileptons plus multijets and large missing
energy. We conclude that it is possible to observe the Z1 resonance at a 5
sigma level with an integrated luminosity of 100 inverse fb at the LHC upto 650
GeV for a dominant WW channel, and 560 GeV for a dominant ttbar channel.Comment: 13 pages, 7 figure
Phase structure of lattice QCD with two flavors of Wilson quarks at finite temperature and chemical potential
We present results for phase structure of lattice QCD with two degenerate
flavors () of Wilson quarks at finite temperature and small baryon
chemical potential . Using the imaginary chemical potential for which
the fermion determinant is positive, we perform simulations at points where the
ratios of pseudo-scalar meson mass to the vector meson mass are
between and as well as in the quenched limit. By analytic
continuation to real quark chemical potential , we obtain the transition
temperature as a function of small . We attempt to determine the nature
of transition at imaginary chemical potential by histogram, MC history, and
finite size scaling. In the infinite heavy quark limit, the transition is of
first order. At intermediate values of quark mass corresponding to the
ratio of in the range from to at
, the MC simulations show absence of phase transition.Comment: 10 pages, 17 figures;16 figures;9 pages,10 figures;10 pages,11
figure
UCMCTrack: Multi-Object Tracking with Uniform Camera Motion Compensation
Multi-object tracking (MOT) in video sequences remains a challenging task,
especially in scenarios with significant camera movements. This is because
targets can drift considerably on the image plane, leading to erroneous
tracking outcomes. Addressing such challenges typically requires supplementary
appearance cues or Camera Motion Compensation (CMC). While these strategies are
effective, they also introduce a considerable computational burden, posing
challenges for real-time MOT. In response to this, we introduce UCMCTrack, a
novel motion model-based tracker robust to camera movements. Unlike
conventional CMC that computes compensation parameters frame-by-frame,
UCMCTrack consistently applies the same compensation parameters throughout a
video sequence. It employs a Kalman filter on the ground plane and introduces
the Mapped Mahalanobis Distance (MMD) as an alternative to the traditional
Intersection over Union (IoU) distance measure. By leveraging projected
probability distributions on the ground plane, our approach efficiently
captures motion patterns and adeptly manages uncertainties introduced by
homography projections. Remarkably, UCMCTrack, relying solely on motion cues,
achieves state-of-the-art performance across a variety of challenging datasets,
including MOT17, MOT20, DanceTrack and KITTI. More details and code are
available at https://github.com/corfyi/UCMCTrackComment: Accepted to AAAI 202
Integrating microfluidics and biosensing on a single flexible acoustic device using hybrid modes
Integration of microfluidics and biosensing functionalities on a single device holds promise in continuous health monitoring and disease diagnosis for point-of-care applications. However, the required functions of fluid handling and biomolecular sensing usually arise from different actuation mechanisms. In this work, we demonstrate that a single acoustofluidic device, based on a flexible thin film platform, is able to generate hybrid waves modes, which can be used for fluidic actuation (Lamb waves) and biosensing (thickness shear waves). On this integrated platform, we show multiple and sequential functions of mixing, transport and disposal of liquid volumes using Lamb waves, whilst the thickness bulk shear waves allow us to sense the chemotherapeutic Imatinib, using an aptamer-based strategy, as would be required for therapy monitoring. Upon binding, the conformation of the aptamer results in a change in coupled mass, which has been detected. This platform architecture has the potential to generate a wide range of simple sample-to-answer biosensing acoustofluidic devices
Higher-order Topological Phases of Magnons in van der Waals Honeycomb Ferromagnets
We theoretically propose a second-order topological magnon insulator by
stacking the van der Waals honeycomb ferromagnets with antiferromagnetic
interlayer coupling. The system exhibits Z topological phase, protected
by pseudo-time-reversal symmetry (PTRS). An easy-plane anisotropy term breaks
PTRS and destroys the topological phase. Nevertheless, it respects a magnetic
two-fold rotational symmetry which protects a second-order topological phase
with corner modes in bilayer and hinge modes along stacking direction.
Moreover, an introduced staggered interlayer coupling establishes a
ZZ topology, giving rise to gapped topological surface modes
carrying non-zero Chern numbers. Consequently, chiral hinge modes propagate
along the horizontal hinges in a cuboid geometry and are robust against
disorders. Our work bridges the higher-order topology and magnons in van der
Waals platforms, and could be used for constructing topological magnonic
devices
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