Can we understand the decay width of the $T_{cc}^{+}$ state?

Abstract

Inspired by the recent discovery of a doubly charmed tetraquark state $T_{cc}^{+}$ by the LHCb Collaboration, we employ the effective Lagrangian approach to investigate the decay width of $T_{cc}^{+}\to D^{+}{D}^0{\pi }^0/D^0{D}^0{\pi }^{+}$ and $T_{cc}^{+}\to D^0{D}^{+}\gamma$ with the assumption that $T_{cc}^{+}$ is an isoscalar $D{D}^{\ast }$ molecule. We show that both the $T_{cc}\to DD\pi$ and $T_{cc}\to DD\gamma$ modes contribute to the decay width of $T_{cc}$, with the former being dominant. The resulting total decay width of about $\Gamma =63$ keV is smaller than the experimental decay width obtained from the Breit-Wigner fit of the LHCb data, $\Gamma =410\pm 165\pm 43_{-38}^{+18}$ keV, while close to the number obtained from the alternative unitary analysis, $\Gamma =48\pm 2_{-14}^{+0}$ keV, which supports the molecular nature of $T_{cc}$.

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Cited by in corpus (47)

• An updated review of the new hadron states
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• $T_{cc}^{+}$ coupled channel analysis and predictions
• Analysis of the doubly-charmed tetraquark molecular states with the QCD sum rules
• Doubly Charmed Tetraquark $T_{cc}^{+}$ from Lattice QCD near Physical Point
• $T_{cc}^{+}$ and its partners
• $T_{cc}^{+}(3875)$ relevant $D{D}^{\ast }$ scattering from $N_f=2$ lattice QCD
• Hadronic molecule interpretation of $T_{cc}^{+}$ and its beauty-partners
• Prediction of new $T_{cc}$ states of $D^{\ast }{D}^{\ast }$ and $D_s^{\ast }{D}^{\ast }$ molecular nature
• Revisiting the $D{D}^{\ast }$ chiral interactions with the local momentum-space regularization up to the third order and the nature of $T_{cc}^{+}$
• Compositeness of S-wave weakly-bound states from next-to-leading order Weinberg's relations
• Double-charm tetraquark under the complex scaling method
• Multiplicity of the doubly charmed state $T_{cc}^{+}$ in heavy-ion collisions
• Strong decays of $T_{cc}^{+}$ at NLO in an effective field theory
• Triangle Singularity in the Production of $T_{cc}^{+}$(3875) and a Soft Pion
• Doubly heavy tetraquark multiplets as heavy antiquark-diquark symmetry partners of heavy baryons
• Masses and widths of the exotic molecular $B_{(s)}^{(\ast )}{B}_{(s)}^{(\ast )}$ states
• Pole analysis on the doubly charmed meson in $D^0{D}^0{\pi }^{+}$ mass spectrum
• The quasi-fission phenomeonon of double charm $T_{cc}^{+}$ induced by nucleon
• Heavy- and light-flavor symmetry partners of the $T_{cc}^{+}(3875)$, the $X(3872)$ and the $X(3960)$ from light-meson exchange saturation
• New insight into the exotic states strongly coupled with the $D{\bar{D}}^{\ast }$ from the $T_{cc}^{+}$
• Interactions of the doubly charmed state $T_{cc}^{+}$ with a hadronic medium
• Triple-charm molecular states composed of $D^{\ast }{D}^{\ast }D$ and $D^{\ast }{D}^{\ast }{D}^{\ast }$
• A note on the possible bound $D^{(\ast )}{D}^{(\ast )},{\bar{B}}^{(\ast )}{\bar{B}}^{(\ast )}$ and $D^{(\ast )}{\bar{B}}^{(\ast )}$ states
• The low-lying hidden- and double-charm tetraquark states in a constituent quark model with Instanton-induced Interaction
• Magnetic moments of the doubly charged axial-vector $T_{cc}^{++}$ states
• Production rates of $D_s^{+}{D}_s^{-}$ and $D\bar{D}$ molecules in $B$ decays
• Exploring the magnetic dipole moments of $T_{QQ\bar{q}\bar{s}}$ and $T_{QQ\bar{s}\bar{s}}$ states in the framework of QCD light-cone sum rules
• Hadronic decays of the heavy-quark-spin molecular partner of $T_{cc}^{+}$
• Three-body molecules $\bar{D}{\bar{D}}^{\ast }{\Sigma }_c$- understanding the nature of $T_{cc}$, $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$
• Molecular states of $D^{\ast }{D}^{\ast }{\bar{K}}^{\ast }$ nature
• Doubly heavy tetraquark states in a mass splitting model
• Searching for doubly charmed tetraquark candidates $T_{cc}$ and $T_{cc\bar{s}}$ in $B_c$ decays
• Doubly-Charged $T_{cc}^{++}$ States in the Dynamical Diquark Model
• Exotic states with triple charm
• Magnetic dipole moments of $B_{(s)}^{(\ast )}{B}_{(s)}^{(\ast )}$ states
• Hadronic molecular states with the quark contents $bc\bar{s}\bar{q}$, $b\bar{c}s\bar{q}$, and $b\bar{c}\bar{s}q$
• Electromagnetic properties of the $T_{cc}^{+}$ molecular states
• Isospin violation effect and three-body decays of the $T_{cc}^{+}$ state
• Radiative decays of the heavy-quark-spin molecular partner of $T_{cc}^{+}$
• Spectroscopic Properties of Double-Strangeness Molecular Tetraquarks
• Predictions of super-exotic heavy mesons from $K^{\ast }{B}^{\ast }{B}^{\ast }$ interactions
• Hunting for the prospective $T_{cc}$ family based on the diquark-antidiquark configuration
• Investigation on the bottom analogs of the $T_{cc}^{+}$
• An alternative way to decipher the nature of the doubly charmed tetraquark $T_{cc}(3875{)}^{+}$: its antiparticle $T_{\bar{c}\bar{c}}(3875{)}^{-}$ photoproduction off nuclei near threshold
• Unveiling the Composition of the Single-Charm Molecular Pentaquarks: Insights from Radiative Decay and Magnetic Moment
• Hadronic molecule model for the doubly charmed state $T_{cc}^{+}$