In the framework of color-magnetic interaction, we systematically investigate mass spectrum tetraquark states composed four heavy quarks with $QQ\overline{Q}\overline{Q}$ configuration in this work. We also show their strong decay patterns. Stable or narrow $bb\overline{b}\overline{c}$ and $bc\overline{b}\overline{c}$ systems are found to be possible. hope studies shall helpful experimental search for heavy-full exotic states.

In this work, we study systematically the mass splittings of $$qq\bar{Q}\bar{Q}$$ ( $$q=u$$ , d, s and $$Q=c$$ b) tetraquark states with color-magnetic interaction by considering color mixing effects estimate roughly their masses. We find that effect is relatively important for $$J^P=0^+$$ possible stable tetraquarks exist in $$nn\bar{Q}\bar{Q}$$ $$n=u$$ d) $$ns\bar{Q}\bar{Q}$$ systems either $$J=0$$ or $$J=1$$ . Possible decay patterns are briefly discussed.

With a quark level interaction, we give unified description of the loosely bound molecular systems composed heavy flavor hadrons $(\bar{D},\bar{D}^*)$, $(\Lambda_c, \Sigma_c, \Sigma_c^*)$, and $(\Xi_c, \Xi_c^\prime,\Xi_c^*)$. Using $P_c$ states as inputs to fix interaction strength light quark-quark pairs, reproduce observed $P_{cs}$ $T_{cc}^+$ predict another narrow $T_{cc}^{\prime+}$ state with quantum numbers $[D^*D^*]_{J=1}^{I=0}$. If require satisfactory simultaneously, our framework...

We investigate the mass spectrum of molecular pentaquarks composed a baryon and meson. establish underlying relations among near-threshold interactions tetraquark pentaquark systems. find existence molecule candidates in <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msub><a:mrow><a:mi mathvariant="normal">Σ</a:mi></a:mrow><a:mrow><a:mi>c</a:mi></a:mrow></a:msub><a:msup><a:mrow><a:mover accent="true"><a:mrow><a:mi>D</a:mi></a:mrow><a:mrow><a:mo...

We relate the interactions of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mover accent="true"><a:mrow><a:mi>D</a:mi></a:mrow><a:mrow><a:mo stretchy="false">¯</a:mo></a:mrow></a:mover></a:mrow><a:mrow><a:mo stretchy="false">(</a:mo><a:mo>*</a:mo><a:mo stretchy="false">)</a:mo></a:mrow></a:msup><a:msup><a:mrow><a:mi>K</a:mi></a:mrow><a:mrow><a:mo>*</a:mo></a:mrow></a:msup></a:mrow></a:math> and <g:math...

In the simple color-magnetic interaction model, we investigate possible ground $cs\bar{c}\bar{s}$ tetraquark states in diquark-antidiquark basis. We use several methods to estimate mass spectrum and discuss assignment for $X$ observed $J/\psi\phi$ channel. find that assigning Belle $X(4350)$ as a $0^{++}$ is consistent with interpretation $X(4140)$ $X(4270)$ while of $X(4500)$ $X(4700)$ needs orbital or radial excitation. There probably exist tetraquarks around 4.3 GeV decay into $\eta_c\phi$.

In the framework of color-magnetic interaction, we have systematically studied mass splittings possible hidden-charm pentaquarks $qqqc\bar{c}$ ($q=u,d,s$) where three light quarks are in a color-octet state. We find that i) LHCb $P_c$ states fall region system; ii) most should be broad since their $S$-wave open-charm decays allowed while lowest state is $J^P=\frac12^-$ $\Lambda$-like pentaquark with probably suppressed $\eta_c\Lambda$ decay mode only; and iii) $J^P=\frac52^-$ do not through...

Very recently, the LHCb Collaboration reported a fully charmed tetraquark state $X(6900)$ in invariant mass spectrum of $J/\ensuremath{\psi}$ pairs. If one meson is replaced with baryon, we obtain pentaquark candidate. In this work, perform systematic study on spectra $S$-wave heavy $QQQQ\overline{Q}$ framework chromomagnetic interaction model. Based our results two different schemes, further investigate decay behaviors for them. We hope that will be helpful searching such types exotic...

We proposed a unified framework to describe the interactions of observed $T_{cc}$, $P_c$, and $P_{cs}$ within quark level interaction in our previous work. In this work, we generalize loosely bound hadronic molecules composed heavy flavor di-hadrons with strangeness. predict possible $D^{(*)}D^{(*)}_s$ molecular states SU(3) limit masses $P_c$ as inputs. also investigate baryon-meson baryon-baryon systems consider breaking effect their wave functions. isospin criterion formation di-hadron...

We construct the effective potentials of ${P}_{\ensuremath{\psi}}^{N}$ and ${P}_{\ensuremath{\psi}s}^{\mathrm{\ensuremath{\Lambda}}}$ states based on ${\mathrm{SU}(3)}_{\mathrm{f}}$ symmetry heavy quark symmetry. Then we perform coupled-channel analysis lowest-isospin systems. The effects play different roles in In systems, this effect gives minor corrections to masses states. system,...

We investigate the mass spectra of molecular-type hexaquark states in dibaryon systems. These systems are composed charmed baryons <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mo stretchy="false">[</a:mo><a:msubsup><a:mrow><a:mi mathvariant="normal">Σ</a:mi></a:mrow><a:mrow><a:mi>c</a:mi></a:mrow><a:mrow><a:mo stretchy="false">(</a:mo><a:mo>*</a:mo><a:mo stretchy="false">)</a:mo></a:mrow></a:msubsup><a:mo>,</a:mo><a:msubsup><a:mrow><a:mi...

Inspired by the abundant experimental observation of axial-vector states, we study whether observed states can be categorized into conventional meson family. In this paper carry out an analysis based on mass spectra and two-body Okubo-Zweig-Iizuka-allowed decays. Besides testing possible assignments, also predict information for their decays properties some missing mesons, which are valuable further exploration predicted mesons.

As a hot issue, exploring exotic pentaquarks is full of challenges and opportunities for both theorist experimentalist. In this work, we focus on type pentaquark with the $QQqq\bar{q}$ ($Q=b,c$; $q=u,d,s$) configuration, where their mass spectrum estimated systematically. Especially, our result indicates that there may exist some stable or narrow states. Obviously, study provides valuable information further experimental search pentaquarks. With running LHCb forthcoming Belle II, have reason...

We perform a systematic study on the interactions of ${\mathrm{\ensuremath{\Sigma}}}_{c}^{(*)}{D}^{(*)}$ systems within framework chiral effective field theory. introduce contact term, one-pion-exchange and two-pion-exchange contributions to describe short-, long-, intermediate-range interactions. The low energy constants are estimated from $N\overline{N}$ scattering data by introducing quark level Lagrangian. With three solutions LECs, all with isospin $I=1/2$ can form bound states, in...

Using the Regge-like formula $$(M-m_Q)^2=\pi \sigma L$$ between hadron mass M and angular momentum L with a heavy quark $$m_Q$$ string tension $$\sigma $$ , we analyze all heavy–light systems, i.e., $$D/D_s/B/B_s$$ mesons charmed bottom baryons. Numerical plots are obtained for of experimental data whose slope becomes nearly equal to 1/2 that light hadrons. Assuming baryons consist one cluster two quarks (diquark), apply including recently discovered $$\Omega _c$$ find these experimentally...

We examine the internal structure of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi mathvariant="normal">Λ</a:mi><a:mo stretchy="false">(</a:mo><a:mn>1670</a:mn><a:mo stretchy="false">)</a:mo></a:math> through an analysis lattice QCD simulations and experimental data within Hamiltonian effective field theory. Two scenarios are presented. The first describes <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"><f:mi...

Based on a contact Lagrangian that incorporates the SU(3) flavor and SU(2) spin symmetries, we discuss symmetry properties of interactions among heavy meson-baryon <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msubsup><a:mi>P</a:mi><a:mi>ψ</a:mi><a:mi>N</a:mi></a:msubsup></a:math>, <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msubsup><c:mi>P</c:mi><c:mrow><c:mi>ψ</c:mi><c:mi>s</c:mi></c:mrow><c:mi...

In this work, we carry out the study of heavy flavor pentaquarks with four quarks, which have typical $QQQQ\overline{q}$ configuration. Within chromomagnetic interaction model, mass spectrum these discussed is given. addition to analysis, also illustrate their two-body strong decay behavior by estimating some ratios channels. By efforts, suggest that a future experiment should pay attention kind pentaquark.

The newly observed $\Xi(1620)^0$ by the Belle Collaboration inspires our interest in performing a systematic study on interaction of an anti-strange meson $(\bar{K}^{(*)})$ with strange or doubly ground octet baryon $\mathcal{B}$ ($\Lambda$, $\Sigma$, and $\Xi$), where spin-orbit force recoil correction are considered adopted one-boson-exchange model. Our results indicate that can be explained as $\bar{K}\Lambda$ molecular state $I(J^P)=1/2(1/2^-)$ intermediate from $\sigma$ exchange plays...

Inspired by the observed $X(2900)$, we study systematically mass spectra of ground pentaquark states with $qqqq\overline{Q}$ ($Q=c$, $b$; $q=n$, $s$; $n=u$, $d$) configuration in framework Chromomagnetic Interaction model. We present a detailed analysis their stabilities and decay behaviors. Our results indicate that there may exist narrow or even stable states. hope inspire experimentalist's interest searching for such type exotic state.

We calculate the complete $T$ matrices of elastic light pseudoscalar meson and heavy scattering to third order in chiral perturbation theory. determine low-energy constants by fitting phase shifts lengths from lattice QCD simulations simultaneously predict at physical masses. The $D\pi(I=1/2)$, $DK(I=0)$, $D\bar{K}(I=0)$, $D_s\bar{K}$, $D\eta$ $D_s\eta$ $S$ waves are so strong that bound states or resonances may be generated dynamically all these channels. $DK(I=0)$ channel corresponds...

HIV-1 capsid (CA) and human cyclophilin A (CypA) play important roles in assembly disassembly processes, which are critical replication. Based on the discovery of thiourea derivatives targeting both two proteins indicating effective inhibitory activities our group, we designed synthesized a new class derivatives. Their abilities to bind were determined by ultraviolet spectroscopic analysis, fluorescence binding affinity, PPIase inhibition assay. Furthermore, newly compounds tested for their...

Based on the hadronic resonance picture, we explore a unified framework to describe observed <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>Z</a:mi><a:mrow><a:mi>c</a:mi><a:mi>s</a:mi></a:mrow></a:msub></a:math> and <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msub><c:mi>Z</c:mi><c:mi>c</c:mi></c:msub></c:math> states that are close thresholds of <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"...