Experimentally, the doubly charm tetraquark channel <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>c</a:mi><a:mi>c</a:mi><a:mover accent="true"><a:mi>q</a:mi><a:mo stretchy="false">¯</a:mo></a:mover><a:mover stretchy="false">¯</a:mo></a:mover></a:math> with <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:mrow><g:mi>q</g:mi><g:mo>=</g:mo><g:mi>u</g:mi></g:mrow></g:math>, <i:math xmlns:i="http://www.w3.org/1998/Math/MathML"...

We present a study of mass spectra and electromagnetic couplings $S$- $P$-wave baryons containing one, two or three heavy quarks, either charm ($c$) bottom ($b$), in the framework nonrelativistic harmonic-oscillator quark model. A simultaneous fit to 41 known masses (40 singly 1 doubly heavy) shows rms deviation 19 MeV. equal-spacing rules for excited which may help assign quantum numbers experimentally observed baryons. Explicit expressions are derived couplings, both spin-flavor matrix...

Abstract The observation of five $$\varOmega _c $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>Ω</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math> = ssc states by LHCb [Aaij et al. Phys. Rev. Lett. 118 , 182001 (2017)] and the confirmation four them Belle [Yelton D 97 051102 (2018)], may represent an important milestone in our understanding quark organization inside hadrons. By providing results for spectrum _{ c}$$ baryons predictions their $$\varXi...

In this article, we present a complete classification of the negative parity ${\mathrm{\ensuremath{\Xi}}}_{c/b}^{\ensuremath{'}}$ and ${\mathrm{\ensuremath{\Xi}}}_{c/b}$ $P$-wave states: seven belonging to $SU(3)$ flavor sextet antitriplet, calculation strong partial decay widths into ${^{2}\mathrm{\ensuremath{\Sigma}}}_{c}\overline{K}$, ${^{2}\mathrm{\ensuremath{\Xi}}}_{c}^{\ensuremath{'}}\ensuremath{\pi}$, ${^{4}\mathrm{\ensuremath{\Sigma}}}_{c}\overline{K}$,...

We perform a lattice simulation to investigate the doubly charmed tetraquark $T^+_{cc}$ observed by LHCb collaboration, slightly below $D^{*+}D^0$ threshold, with flavor content $cc\bar{u}\bar{d}$ and isospin-$0$. Two-meson interpolators are implemented explore isospin quantum numbers $I=0$ $I=1$. observe attraction near $DD^*$ threshold for repulsion Moreover, we also include diquark-antidiquark study their effect on energy spectrum. There is no significant shift in ground state when adding...

We develop an extension of the usual three flavor quark model to four flavors (u, d, s and c), discuss classification pentaquark states with hidden charm. fit our known baryon spectrum we predict double triple charm baryons, finding good agreement most recent lattice QCD calculations. compute ground state pentaquarks their associated magnetic moments electromagnetic couplings, interest photoproduction experiments.

The determination of the $DD^{*}$ scattering amplitude from lattice QCD is complicated by long-range interactions. In particular, Lüscher method no longer applicable in kinematical region close to left-hand cut. We tackle this problem adopting plane-wave and effective-field-theoretic methods, which also address partial wave mixing. addition, we incorporate a diquark-antidiquark interpolator operator basis (along with relevant operators) order achieve better resolution energy spectrum....

Abstract In this contribution, we present a study of ground- and excited-state Ω c b baryons consisting two strange quarks heavy charm or bottom quark. An analysis in the quark model shows that recently observed excited states can be interpreted terms λ -mode excitations.

The observation of new $Ω_{c}=ssc$ states by LHCb \cite{Aaij:2017nav} and the confirmation four them Belle \cite{Yelton:2017qxg} may represent an important milestone in our understanding quark organization inside hadrons. By providing results for spectrum $Ω_{c(b)}$ baryons predictions their $Ξ_{c(b)}^{+}K^{-}$ decay channels, we suggest a possible solution to $Ω_{c}$ quantum number puzzle. We also discuss why set are most suitable environment test validity three-quark quark-diquark...

We present a study of two-body decay widths heavy baryons into another baryon and light pseudoscalar meson in the framework non-relativistic quark model combination with elementary emission for strong couplings. The includes decays 1S- 1P-wave one, two or three quarks, either charm (c) bottom (b). relative partial are given by appropriate flavor SU(3) isoscalar factors. flavor, spin orbital contributions discussed explicitly as well selection rules forbidden decays. total compared available...

Experimentally, the doubly charm tetraquark channel $cc\bar q\bar q$ with $q\!=\!u,d$ features an exotic hadron, $T_{cc}$, isospin $I\!=\!0$ near $DD^*$ threshold, while no peak was observed for $I\!=\!1$. We present a lattice QCD study of this $I\!=\!1$, $J^P\!=\!1^+$ and $m_\pi\simeq 280~$MeV. Finite-volume energies calculated across five quark masses consistently indicate repulsive interaction in channel. These are used to compute scattering amplitude using both standard L\"uscher method...

The determination of the $DD^{*}$ scattering amplitude from lattice QCD is complicated by long-range interactions. In particular, L\"uscher method no longer applicable in kinematical region close to left-hand cut. We tackle this problem adopting plane-wave and effective-field-theoretic methods, which also address partial wave mixing. addition, we incorporate a diquark-antidiquark interpolator operator basis (along with relevant operators) order achieve better resolution energy spectrum....

In this article, we present a complete classification of the negative parity $\Xi'_{c/b}$ and $\Xi_{c/b}$ $P$-wave states: 7 belonging to $SU(3)$ flavor sextet anti-triplet, calculation strong partial decay widths into $^2\Sigma_c \bar{K}$, $^2\Xi_c^{'} \pi$, $^4\Xi_c^{'} $\Lambda_c^{'} $\Xi_c^{} \pi$ \eta$ channels both within Elementary Emission Model (EEM) $^3P_0$ model, electromagnetic for radiative decays. By means equal-spacing mass rule by analysis widths, suggest possible assignments...

Abstract We present a study of the low-lying <?CDATA ${{\rm{\Xi }}}_{c/b}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"> <mml:mrow> <mml:msub> <mml:mi mathvariant="normal">Ξ</mml:mi> </mml:mrow> <mml:mi>c</mml:mi> <mml:mo>/</mml:mo> <mml:mi>b</mml:mi> </mml:msub> </mml:math> and }}}_{c/b}^{{\prime} }$?> <mml:msubsup> <mml:mo>′</mml:mo> </mml:msubsup> baryon states based on masses, strong radiative decays. In harmonic oscillator quark model...

We present a study of mass spectra and electromagnetic couplings S- P-wave baryons containing one, two or three heavy quarks, either charm (c) bottom (b), in the framework non-relativistic harmonic oscillator quark model. A simultaneous fit to 41 known masses (40 singly-heavy 1 doubly-heavy) shows r.m.s. deviation 19 MeV. equal-spacing rules for excited which may help assign quantum numbers experimentally observed baryons. Explicit expressions are derived couplings, both spin-flavor matrix...

We present a study of the low-lying $\Xi_{c/b}$ and $\Xi'_{c/b}$ baryon states based on masses, strong radiative decays. In harmonic oscillator quark model analysis it is found that majority detected can be interpreted as $S$- $P$-wave excitations.

We present a study of mass spectra and electromagnetic couplings $S$- $P$-wave heavy baryons in the framework non-relativistic harmonic oscillator quark model. Particular attention is paid to properties cascade baryons, $\Xi_Q$ $\Xi'_Q$.

We perform a lattice simulation to investigate the doubly charmed tetraquark $T^+_{cc}$ observed by LHCb collaboration, slightly below $D^{*+}D^0$ threshold, with flavor content $cc\bar{u}\bar{d}$ and isospin-$0$. Two-meson interpolators are implemented explore isospin quantum numbers $I=0$ $I=1$. observe attraction near $DD^*$ threshold for repulsion Moreover, we also include diquark-antidiquark study their effect on energy spectrum. There is no significant shift in ground state when adding...

We discuss some applications of the unquenched quark model which is an extension CQM that includes effects sea quarks via a 3P0 quark-antiquark pair-creation mechanism. Particular attention paid to electromagnetic couplings and beta decays baryons. It shown observed discrepancies between experimental data predictions can be accounted for in large part by model.

We discuss some applications of the unquenched quark model which is an extension CQM that includes effects sea quarks via a $^{3}P_{0}$ quark-antiquark pair-creation mechanism. Particular attention paid to electromagnetic couplings and $\beta$ decays baryons. It shown observed discrepancies between experimental data predictions can be accounted for in large part by model.

In this contribution, we discuss the electromagnetic and weak decays of baryons in unquenched quark model show that observed discrepancies between experimental data predictions constituent can be accounted for large part by effects sea quarks. Finally, obtained results are discussed terms flavor-symmetry breaking.

In this contribution, we discuss the electromagnetic couplings of pentaquark states with hidden charm. This work is motivated by recent experiments at CERN LHCb Collaboraton and current JLab to confirm existence hidden-charm pentaquarks in photoproduction experiments.

In the present work we estimate orbital contribution to photoproduction of ground state pentaquarks, described as compact $qqqQ\bar{Q}$ configurations with $J^P=3/2^-$ in framework harmonic oscillator quark model. The photocouplings $P_c(uudc\bar{c}) \rightarrow p+\gamma$ are found be highly suppressed due large value photon momentum.