The quark anomalous magnetic moment (AMM) is dynamically generated through spontaneous chiral symmetry breaking. It has been revealed that, even though its exact form is still unknown, the quark AMM is essential to exploring quark matter properties and QCD phase structure under external magnetic fields. In this study, we take three different forms of the quark AMM and investigate its influence on the chiral phase transition under a magnetic field. In general, a negative (positive) quark AMM acts as a magnetic-catalyzer (magnetic-inhibitor) for chiral symmetry breaking. It is found that a constant quark AMM drives an unexpected 1st order chiral phase transition, a quark AMM proportional to the chiral condensate flips the sign on the chiral condensate, and a quark AMM proportional to the square of the chiral condensate suppresses the magnetic enhancement in the chiral condensate at finite temperatures while retaining the chiral crossover phase transition. We also evaluate the intrinsic temperature dependence of the effective AMM form by fitting the effective model result of the chiral condensate to lattice QCD data, which may have a nontrivial correlation with the chiral phase transition.

In the framework of the improved chromomagnetic interaction model, we complete a systematic study of the S-wave tetraquark states $ Qq\bar{Q}\bar{q} $ ( $ Qq\bar{Q}\bar{q} $ , and $ Qq\bar{Q}\bar{q} $ ) with different quantum numbers: $ Qq\bar{Q}\bar{q} $ , $ Qq\bar{Q}\bar{q} $ , and $ Qq\bar{Q}\bar{q} $ . The mass spectra of tetraquark states are predicted, and the possible decay channels are analyzed by considering both the angular momentum and $ Qq\bar{Q}\bar{q} $ -parity conservation. The recently observed hidden-charm tetraquark states with strangeness, such as $ Qq\bar{Q}\bar{q} $ , $ Qq\bar{Q}\bar{q} $ , and $ Qq\bar{Q}\bar{q} $ , can be well explained in our model. Additionally, according to the wave function of each tetraquark state, we find that the low-lying states of each $ Qq\bar{Q}\bar{q} $ configuration have a large overlap to the $ Qq\bar{Q}\bar{q} $ and $ Qq\bar{Q}\bar{q} $ meson basis, instead of the $ Qq\bar{Q}\bar{q} $ and $ Qq\bar{Q}\bar{q} $ meson basis. This indicates that one can search these tetraquark states in future experiments via the channel of $ Qq\bar{Q}\bar{q} $ and $ Qq\bar{Q}\bar{q} $ mesons.

We adopt the quark pair creation model to investigate the light meson emissions of several charmonium-like states. The quark pair creation model is applied to four-body systems, and we calculate the pion/kaon emissions of $ X(4700) $ , $ X(4700) $ , $ X(4700) $ , $ X(4700) $ , $ X(4700) $ , and $ X(4700) $ within compact tetraquark configurations. We find that the pion/kaon decay widths of $ X(4700) $ and $ X(4700) $ are relatively small, whereas the partial decay widths of the resonances $ X(4700) $ , $ X(4700) $ , $ X(4700) $ , and $ X(4700) $ are significant. We expect that our exploration of these decay behaviors will provide useful information for future experimental searches and theoretical interpretations.

We explain the W-boson mass anomaly by introducing an $S U(2)_L$ scalar multiplet with general isospin and hypercharge {in the case without its vacuum expectation value}. It is shown that the dominant contribution from the scalar multiplet to the W-boson mass arises at the one-loop level, which can be expressed in terms of the electroweak (EW) oblique parameters T and S at leading order. We first rederive the general formulae of T and S induced by a scalar multiplet of EW charges, confirming the results in literature. We then study several specific examples of great phenomenological interest by applying these general expressions. As a result, it is found that the model with a scalar multiplet in an $S U(2)_L$ real representation with $S U(2)_L$ cannot generate the required $S U(2)_L$ correction because it leads to vanishing values of T and S. However, the cases with scalars in a complex representation under $S U(2)_L$ with a general hypercharge can explain the $S U(2)_L$ excess observed by CDF-II owing to nonzero T and S. We further consider the strong constraints from the perturbativity and EW global fit of the precision data and vary the isospin representation and hypercharge of the additional scalar multiplet to assess the extent of the model to solve the W-boson mass anomaly. It turns out that these constraints play important roles in setting limits on the model parameter space. We also briefly describe the collider signatures of the extra scalar multiplet, especially when it contains long-lived, heavy, highly charged states.

In our previous studies, we analyzed the two-body strong decays of the low-lying Ω baryon states within a chiral quark model. The results showed that the mass, total width, and two body decay $ \Omega(2012) \to \bar{K}\Xi $ could be well reproduced with the spin-parity $ \Omega(2012) \to \bar{K}\Xi $ state $ \Omega(2012) \to \bar{K}\Xi $ classified in the quark model. Stimulated by the new observations of the three-body decay process $ \Omega(2012) \to \bar{K}\Xi $ at Belle, in the present study, we further investigate the three-body strong decay $ \Omega(2012) \to \bar{K}\Xi $ within the chiral quark model. It is found that the $ \Omega(2012) \to \bar{K}\Xi $ has a sizeable decay rate into the three-body final states $ \Omega(2012) \to \bar{K}\Xi $ . When considering $ \Omega(2012) \to \bar{K}\Xi $ as the $ \Omega(2012) \to \bar{K}\Xi $ resonance, the predicted ratio $ \Omega(2012) \to \bar{K}\Xi $ $ \Omega(2012) \to \bar{K}\Xi $ is close to the upper limit $ \Omega(2012) \to \bar{K}\Xi $ measured by the Belle Collaboration in 2019; however, it is too small to be comparable to the recent measurement $ \Omega(2012) \to \bar{K}\Xi $ . In addition, the coupled-channel effects on the bare three-quark state $ \Omega(2012) \to \bar{K}\Xi $ from nearby channels $ \Omega(2012) \to \bar{K}\Xi $ , $ \Omega(2012) \to \bar{K}\Xi $ , and $ \Omega(2012) \to \bar{K}\Xi $ are studied. Our theoretical results show that the coupled-channel effects on $ \Omega(2012) \to \bar{K}\Xi $ are not very large, and the molecular component is no more than $ \Omega(2012) \to \bar{K}\Xi $ . To clarify the nature of $ \Omega(2012) \to \bar{K}\Xi $ resonance, precise measurements on the ratio $ \Omega(2012) \to \bar{K}\Xi $ are needed, and further investigation on the effects of coupled channels is recommended.

Glueballs are investigated through gluonic operators on two $ N_f=2+1 $ RBC/UKQCD gauge ensembles at the physical pion mass. The statistical errors of glueball correlation functions are considerably reduced through the cluster decomposition error reduction (CDER) method. The Bethe-Salpeter wave functions are obtained for the scalar, tensor, and pseudoscalar glueballs by using spatially extended glueball operators defined through the gauge potential $ N_f=2+1 $ in the Coulomb gauge. These wave functions exhibit similar features of non-relativistic two-gluon systems and are used to optimize the signals of the related correlation functions at the early time regions, where the ground state masses are extracted. These masses are close to those from the quenched approximation and indicate the possible existence of glueballs at the physical point. The resonance feature of glueballs and the mixing with conventional mesons and multi-hadron systems should be considered in a more systematic lattice study.

The simplest version of the dynamical holographic QCD model is described by adding the KKSS model action on a dilaton-graviton coupled background, in which the AdS $ _5 $ metric is deformed by the gluon condensation and further deformed by the chiral condensation. In this framework, both the chiral symmetry breaking and linear confinement can be realized. The light-flavor hadron spectra and the pion form factor were investigated, but it was difficult to reconcile the light-flavor hadron spectra and pion form factor. By considering the anomalous 5-dimension mass correction of the scalar field from QCD running coupling, it is found that the light flavor hadron spectra and pion form factor can be described well simultaneously. In particular, the ground state and lower excitation states of the scalar, pseudo scalar, and axial vector meson spectra are improved. However, the vector meson spectra are not sensitive to the anomalous 5-dimension mass correction of the scalar field.

We derive a parameterization formula for the partial wave analyses of charmed meson semi-leptonic decays while considering the effects of lepton mass. Because the proposed super-tau-charm factory will reach a significantly enhanced luminosity and BESIII is collecting new $ \psi(3770)\to D\bar{D} $ data, our results will help improve the measurement precision of future partial wave analyses of charmed meson semi-muonic decays.

{p=Epileptic seizures are caused by abnormal electrical activity in the brain manifesting in a variety of ways and can affect the patient’s health. The seizure peak is reached after a sequence of stages. Using the Electroencephalogram (EEG) output, this work aims at predicting the next seizure by detecting the onset of the preictal state, which is the state immediately before the epileptic seizure. In this project, the EEG measurements of electrical activity in the brain are collected from CHB-MIT database. Wavelet analysis is carried out to separate the brain’s signals by decomposing the signals into different frequency bands, namely, low-pass and high-pass sub bands. This helps in capturing the signals of interest with few large magnitudes. Noise is then removed from the collected EEG signals by removing the artifacts that deteriorated the original recordings. Most artifacts are caused by body movements, such as the electrical activity of muscle tissue recorded by Electromyography (EMG), the electrical signals in the heart recorded by Electrocardiogram (ECG), and blinking eyes. The energy signals are computed as needed for the feature extraction step. Finally, the machine learning classifiers; K-Nearest Neighbor (KNN), Support Vector Machine (SVM), and Random Forest (RF) algorithms are employed to classify the signals into seizures or non-seizures. The three classifying techniques, KNN, SVM, and RF are evaluated using an accuracy score function. The classifiers’ performance evaluation yields the accuracies of 88%, 84%, and 94% for KNN, SVM, and RF respectively. Therefore, Random Forest (RF) proved to have the highest accuracy among the classifiers tested based on the accuracy method used., h1=Abstract}

{p=The world of product recommendation is growing rapidly. With the rapid increase in the number of products available, it becomes increasingly important for people to know what is best for their needs. A recommendation system is a computerized system for recommending products to customers. It uses data and algorithms to determine the best products to recommend, based on the user's preferences. The term is also used to describe the process of determining which products to recommend by analyzing user behavior patterns or other data. We aim to develop a smart recommender system that will be able to recommend and predict the products that the user most likely will purchase based on several recommendation methods including collaborative filtering, the popularity-based method, and content-based method. This work relied on the cosine similarity metric to find the nearest neighbors when applied to character-type data in machine learning due to its dynamic ability to adapt to different data features. Cosine similarity is employed in textual data to find the similarity between the vectorized texts and original text document. The Popularity-based approach provided an accuracy of 99.9% when recommending the most popular items. The Content-based recommendation system reached a 96% accuracy rate when tested on the authors’ website. They can handle circumstances in which various users do not share the same products, but only identical items based on their fundamental characteristics. Finally, the Collaborative-based approach resulted in weak suggestions with only 87% accuracy rate when tested on authors’ website., h1=Abstract}