New $X_{0,1}(2900)$-like exotic states in $b$-baryon decays

Abstract

In the $B^{+}\to D^{+}{D}^{-}{K}^{+}$ decay, LHCb has reported the observation of the open-charm exotic states $X_{0,1}^0\equiv X_{0,1}(2900{)}^0$ with four different quark flavors~$(ud\bar{s}\bar{c})$, where the subscripts (0,1) denote the spins. To confirm the discovery, we propose ${\Lambda }_b\to {\Sigma }_c^{0(++)}{X}_{0,1}^{\prime 0(--)}$ in the final state interaction, where $X_{0,1}^{\prime 0(--)}$ with $su\bar{d}\bar{c}$ ($ds\bar{u}\bar{c}$) are the new $X_{0,1}$-like exotic states. More specifically, ${\Lambda }_c^{+}{D}_s^{-}$ in ${\Lambda }_b\to {\Lambda }_c^{+}{D}_s^{-}$ are transformed as ${\Sigma }_c^{0(++)}{X}_{0,1}^{\prime 0(--)}$, by exchanging ${\pi }^{+(-)}$. As the order of magnitude estimates, we calculate $\mathcal{B}({\Lambda }_b\to {\Sigma }_c^{0(++)}{X}_{0,1}^{\prime 0(--)})=(2.3\pm 0.6,4.3\pm 0.8_{-2.5}^{+3.3})\times 10^{-4}$. In addition, we estimate other $b$-baryon decays with the $X_{0,1}$-like states, such as $\mathcal{B}({\Xi }_b^{0(-)}\to {\Xi }_c^{0(+)}(2645)X_0^{\prime 0(--)},{\Lambda }_b\to {\Xi }_c^{\prime 0}{X}_{0,1}^0)\sim 10^{-5}$. While one needs ${\Lambda }_b\to {\Sigma }_c^{0(++)}{M}_{c}M$ to observe $X_{0,1}^{\prime 0(--)}\to M_{c}M$ with $M_{c}M=D_s^{-}{\pi }^{+}$, ${\bar{D}}^0{\bar{K}}^0$ $(D_s^{-}{\pi }^{-}$, $D^{-}{K}^{-})$, $\mathcal{B}({\Lambda }_b\to {\Sigma }_c^{0(++)}{X}_{0,1}^{\prime 0(--)},X_{0,1}^{\prime 0(--)}\to M_{c}M)\sim 10^{-4}$ are accessible to the LHCb experiment.

arXiv comment10 pages, 1 figure, version to appear in PRD

References in corpus (33)

• Automatized One-Loop Calculations in 4 and D dimensions
• Observation of $J/\psi p$ resonances consistent with pentaquark states in ${\Lambda }_b^0\to J/\psi K^{-}p$ decays
• Reduction schemes for one-loop tensor integrals
• From the Deuteron to Deusons, an Analysis of Deuteronlike Meson-Meson Bound States
• Evidence of a $J/\psi \Lambda$ structure and observation of excited ${\Xi }^{-}$ states in the ${\Xi }_b^{-}\to J/\psi \Lambda K^{-}$ decay
• Understanding the newly observed heavy pentaquark candidates
• ${\Lambda }_b\to p{\ell }^{-}{\bar{\nu }}_{\ell }$ and ${\Lambda }_b\to {\Lambda }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ form factors from lattice QCD with relativistic heavy quarks
• Amplitude analysis of the $B^{+}\to D^{+}{D}^{-}{K}^{+}$ decay
• Model-independent study of structure in $B^{+}\to D^{+}{D}^{-}{K}^{+}$ decays
• Evidence for a $B_s^0{\pi }^{\pm }$ State
• A new interpretation for the $D_{s2}^{\ast }(2573)$ and the prediction of novel exotic charmed mesons
• Form Factors for Lambda_b -> Lambda Transitions in SCET
• Strong Decays of Charmed Baryons in Heavy Hadron Chiral Perturbation Theory: An Update
• Search for structure in the $B_s^0{\pi }^{\pm }$ invariant mass spectrum
• Open-charm tetraquark $X_c$ and open-bottom tetraquark $X_b$
• Predictions for nonleptonic Lambda_b and Theta_b decays
• Triangle singularity as the origin of $X_0(2900)$ and $X_1(2900)$ observed in $B^{+}\to D^{+}{D}^{-}{K}^{+}$
• First exotic hadron with open heavy flavor: $cs\bar{u}\bar{d}$ tetraquark
• Direct CP violation in ${\Lambda }_b$ decays
• Search for the X(5568) state decaying into ${\mathrm{B}}_{\mathrm{s}}^0{\pi }^{\pm }$ in proton-proton collisions at $\sqrt{s}=$ 8 TeV
• Resonant $a_0(980)$ state in triangle rescattering $D_s^{+}\to {\pi }^{+}{\pi }^0\eta$ decays
• Production of $P_{cs}(4459)$ from ${\Xi }_b$ decay
• A search for the exotic meson $X(5568)$ with the Collider Detector at Fermilab
• Kinematical Cusp and Resonance Interpretations of the $X(2900)$
• Search for a Structure in the $B_s^0{\pi }^{\pm }$ Invariant Mass Spectrum with the ATLAS Experiment
• Discriminating among interpretations for the $X(2900)$ states
• Study of the strong ${\Sigma }_c\to {\Lambda }_c\pi$, ${\Sigma }_c^{\ast }\to {\Lambda }_c\pi$ and ${\Xi }_c^{\ast }\to {\Xi }_c\pi$ decays in a nonrelativistic quark model
• Branching fractions of $B^{-}\to D^{-}{X}_{0,1}(2900)$ and their implications
• Charmed ${\Omega }_c$ weak decays into $\Omega$ in the light-front quark model
• Production of $Z_c(3900$) and $Z_c(4020)$ in $B_c$ decay
• ${\Lambda }_c{\Sigma }_c\pi$ coupling and ${\Sigma }_c\to {\Lambda }_c\pi$ decay in lattice QCD
• Determinations of $|V_{cb}|$ and $|V_{ub}|$ from baryonic ${\Lambda }_b$ decays
• Simultaneous extractions of $|V_{ub}|$ and $|V_{cb}|$ with only the exclusive ${\Lambda }_b$ decays

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• An updated review of the new hadron states
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Magnetic moment of the $X_1(2900)$ state in the diquark-antidiquark picture
• Searching for $X_0(2900)$ and $X_1(2900)$ through the kaon induced reactions
• Investigating ${\eta }_1^{\prime }(1855)$ exotic states in $J/\psi \to {\eta }_1^{\prime }(1855){\eta }^{(\prime )}$ decays
• Hidden charm ${\mathcal{P}}_{cs}(4338{)}^0$ production in baryonic $B^{-}\to J/\psi \Lambda \bar{p}$ decay
• Rescattering-induced $D\to SS$ weak decays