1,910 research outputs found
Hadronic Decays Involving Heavy Pentaquarks
Recently several experiments have reported evidences for pentaquark
. H1 experiment at HERA-B has also reported evidence for .
is interpreted as a bound state of an with other four light
quarks which is a member of the anti-decuplet under flavor .
While is a state by replacing the in by a . One can also form by replacing the by a . The
charmed and bottomed heavy pentaquarks form triplets and anti-sixtets under
. We study decay processes involving at least one heavy pentaquark
using and estimate the decay widths for some decay modes. We find
several relations for heavy pentaquarks decay into another heavy pentaquark and
a or a which can be tested in the future. can decay
through weak interaction to charmed heavy pentaquarks. We also study some
decay modes with a heavy pebtaquark in the final states. Experiments at the
current factories can provide important information about the heavy
pentaquark properties.Comment: RevTex 20 pages. Revised version. Discussions on the recent H1 data
and new references adde
MCTNet: A Multi-Scale CNN-Transformer Network for Change Detection in Optical Remote Sensing Images
For the task of change detection (CD) in remote sensing images, deep
convolution neural networks (CNNs)-based methods have recently aggregated
transformer modules to improve the capability of global feature extraction.
However, they suffer degraded CD performance on small changed areas due to the
simple single-scale integration of deep CNNs and transformer modules. To
address this issue, we propose a hybrid network based on multi-scale
CNN-transformer structure, termed MCTNet, where the multi-scale global and
local information are exploited to enhance the robustness of the CD performance
on changed areas with different sizes. Especially, we design the ConvTrans
block to adaptively aggregate global features from transformer modules and
local features from CNN layers, which provides abundant global-local features
with different scales. Experimental results demonstrate that our MCTNet
achieves better detection performance than existing state-of-the-art CD
methods
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