1,679 research outputs found
Asymmetries and Violation in Charmed Baryon Decays into Neutral Kaons
We study the asymmetries and violations in charm-baryon
decays with neutral kaons in the final state. The asymmetry can
be used to search for two-body doubly Cabibbo-suppressed amplitudes of
charm-baryon decays, with the one in as a promising
observable. Besides, it is studied for a new -violation effect in these
processes, induced by the interference between the Cabibbo-favored and doubly
Cabibbo-suppressed amplitudes with the neutral kaon mixing. Once the new
CP-violation effect is determined by experiments, the direct asymmetry in
neutral kaon modes can then be extracted and used to search for new physics.
The numerical results based on symmetry will be tested by the
experiments in the future.Comment: 15 pages, 3 tables. Version published in JHE
Unified Language Representation for Question Answering over Text, Tables, and Images
When trying to answer complex questions, people often rely on multiple
sources of information, such as visual, textual, and tabular data. Previous
approaches to this problem have focused on designing input features or model
structure in the multi-modal space, which is inflexible for cross-modal
reasoning or data-efficient training. In this paper, we call for an alternative
paradigm, which transforms the images and tables into unified language
representations, so that we can simplify the task into a simpler textual QA
problem that can be solved using three steps: retrieval, ranking, and
generation, all within a language space. This idea takes advantage of the power
of pre-trained language models and is implemented in a framework called Solar.
Our experimental results show that Solar outperforms all existing methods by
10.6-32.3 pts on two datasets, MultimodalQA and MMCoQA, across ten different
metrics. Additionally, Solar achieves the best performance on the WebQA
leaderboardComment: Findings of ACL 202
Inverse problem of recoverying a time-dependent nonlinearity appearing in third-order nonlinear acoustic equations
In this paper, we consider the inverse problem of recovering a time-dependent
nonlinearity for a third order nonlinear acoustic equation, which is known as
the Jordan-Moore-Gibson-Thompson equation (J-M-G-T equation for short). This
third order in time equation arises, for example, from the wave propagation in
viscous thermally relaxing fluids. The well-posedness of the nonlinear equation
is obtained for the small initial and boundary data. By the higher order
linearization to the nonlinear equation, and construction of complex geometric
optics (CGO for short) solutions for the linearized equation, we derive the
uniqueness of recovering the nonlinearity
Constructing the Equation of State of QCD in a functional QCD based scheme
We construct the equation of state (EoS) of QCD based on the finite chemical
potential information from the functional QCD approaches, with the assistance
of the lattice QCD EoS. The obtained EoS is consistent with the up-to-date
estimations of the QCD phase diagram, including a phase transition temperature
at zero chemical potential of MeV, the curvature of the transition line
and also a critical end point at MeV. In
specific, the phase diagram mapping is achieved by incorporating the order
parameters into the EoS, namely the dynamical quark mass for the chiral phase
transition together with the Polyakov loop parameter for the deconfinement
phase transition. We also implement the EoS in hydrodynamic simulations to
compute the particle yields, ratios and collective flow, and find that our
obtained EoS agrees well with the commonly used one based on the combination of
lattice QCD simulation and hadron resonance gas model.Comment: 8 pages, 12 figure
- …