We have calculated the mass spectra for $\bar{D}_s^{(*)}D^{(*)}$ molecular states and $sc\bar q\bar c$ tetraquark with $J^P=0^+, 1^+, 2^+$. The masses of axial-vector $\bar{D}_sD^{*}$, $\bar{D}_s^{*}D$ $\mathbf{1}_{[sc]} \oplus \mathbf{0}_{[\bar q \bar{c}]}$, $\mathbf{0}_{[sc]} \mathbf{1}_{[\bar \bar{c}]}$ are predicted to be around 3.98 GeV, which in good agreement $Z_{cs}(3985)^-$ from BESIII...

Abstract We find conditions under which the restriction of a divergence-free vector field B to an invariant toroidal surface S is rectifiable; namely constant in suitable global coordinate system. The main results are similar conclusion Arnold’s Structure Theorems but require weaker assumptions than commutation $$[B,\nabla \times B] = 0$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...

introduction: it was shown in a previous study, that mcpip, a cilostamide derivative, increased atrial contraction force without changing contraction rate. to improve this property, two new derivatives of cilostamide were synthesized and their effects on pde3 activity and isolated rat atria contraction were investigated. methods: the inhibitory effect of each compound on pde3 enzyme was determi...

Let $R$ be a commutative ring with identity and $mathbb{A}(R)$ be the set   of ideals of $R$ with non-zero annihilators. In this paper, we first introduce and investigate the principal ideal subgraph of the annihilating-ideal graph of $R$, denoted by $mathbb{AG}_P(R)$. It is a (undirected) graph with vertices $mathbb{A}_P(R)=mathbb{A}(R)cap mathbb{P}(R)setminus {(0)}$, where   $mathbb{P}(R)$ is...

A search is performed for rare and forbidden charm decays of the form $D_{(s)}^+ \to h^\pm \ell^+ \ell^{(\prime)\mp}$, where $h^\pm$ a pion or kaon $\ell^{(')\pm}$ an electron muon. The measurements are using proton-proton collision data, corresponding to integrated luminosity $1.6\text{fb}^{-1}$, collected by LHCb experiment in 2016. No evidence observed 25 decay modes that investigated $90\%$...

Abstract We investigate the MSHT20 global PDF sets, demonstrating effects of varying strong coupling $$\alpha _S(M_Z^2)$$ α S ( M Z 2 ) </mml:mat...