Strong decays of heavy-light mesons in a chiral quark model

Abstract

We carry out a systematic study of the heavy-light meson strong decays in a chiral quark model. For the $S$-wave vectors ($D^{\ast }(2007)$, $D^{\ast \pm }(2010)$), $P$-wave scalars ($D_0^{\ast }(2400)$, $B_0^{\ast }(5730)$) and tensors ($D_2^{\ast }(2460)$, $D_{s2}^{\ast }(2573)$), we obtain results in good agreement with the experimental data. For the axial vectors $D_1(2420)$ and $D_1^{\prime }(2430)$, a state mixing scheme between $1^1{P}_1$ and $1^3{P}_1$ is favored with a mixing angle $\varphi \simeq -(55\pm 5{)}^{\circ }$, which is consistent with previous theoretical predictions. The same mixing scheme also applies to $D_{s1}(2460)$ and $D_{s1}(2536)$ that accounts for the narrow width of the $D_{s1}(2536)$ and its dominant decay into $D^{\ast }K$. For $B_1(5725)$ and $B_1^{\prime }(5732)$, such a mixing explains well the decay width of the former but leads to an even broader $B_1^{\prime }(5732)$. Predictions for the strange-bottom axial vectors are also made. For the undetermined meson $D^{\ast }(2640)$, we find that they fit in well the radially excited state $2^3{S}_1$ according to its decay mode. The newly observed $D_{sJ}^{\ast }(2860)$ strongly favors the $D$-wave excited state $1^3{D}_3$. For $D_{sJ}^{\ast }(2632)$ and $D_{sJ}^{\ast }(2690)$, we find they are difficult to fit in any $D_s$ excitations in that mass region, if the experimental data are accurate. Theoretical predictions for decay modes of those unobserved states as multiplets of 2S and 1D waves are also presented, which should be useful for further experimental search for those states.

14 pages, 6 figures,to appear in PRD

References in corpus (23)

• Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
• Constituent quark model study of the meson spectra
• Dynamically generated 1^+ heavy mesons
• Charmed baryon strong decays in a chiral quark model
• $D_{sJ}(2860)$ and $D_{sJ}(2715)$
• Canonical Interpretation of the D_{sJ}(2860) and D_{sJ}(2690)
• $D_{sJ}(2860)$ resonance and the $s_{\ell }^P={\frac{5}{2}}^{-}$ $c\bar{s}$ ($c\bar{q}$) doublet
• D_{sJ}(2860) as the first radial excitation of the D_{s0}^*(2317)
• New Heavy-Light Mesons $Q\bar{q}$
• Molecular structure of the Bs0*(5725) and Bs1(5778) bottom-strange mesons
• Identifying $D_{sJ}(2700)$ through its decay modes
• Observation and Properties of L=1 B_1 and B_2* Mesons
• Hadron Spectroscopy: Theory and Experiment
• Study of π^{-}p \to ηn at low energies in a chiral constituent quark model
• Understanding masses of $c\bar{s}$ states in Regge phenomenology
• B meson spectroscopy
• D Wave Heavy Mesons
• Heavy Quark Spectroscopy -- Theory Overview
• Spectroscopy of Mesons with Heavy Quarks
• Puzzles of excited charm meson masses
• B_c and Excited B States - A Tevatron Review
• Triquark structure and isospin symmetry breaking in exotic Ds mesons
• Puzzles in charm spectroscopy

Cited by in corpus (32)

• Assignments of ${\Lambda }_Q$ and ${\Xi }_Q$ baryons in the heavy quark-light diquark picture
• Strong and radiative decays of the low-lying $S$- and $P$-wave singly heavy baryons
• Charmed-strange mesons revisited: mass spectra and strong decays
• The newly observed open-charm states in quark model
• Excited bottom and bottom-strange mesons in the quark model
• Strong and radiative decays of the doubly charmed baryons
• B_{s1}(5830) and B_{s2}^*(5840)
• Strong decays of the newly observed $D(2550)$, $D(2600)$, $D(2750)$, and $D(2760)$
• Strong decays of higher excited heavy-light mesons in a chiral quark model
• Understanding the charmed states recently observed by the LHCb and BaBar Collaborations in the quark model
• $\Omega$ baryon spectrum and their decays in a constituent quark model
• Interpretation of $D_{sJ}(2632{)}^{+}$, $D_{s1}(2700{)}^{\pm }$, $D_{sJ}^{\star }(2860{)}^{+}$ and $D_{sJ}(3040{)}^{+}$
• Hidden-charm and radiative decays of the Z(4430) as a hadronic D_1 \bar{D^\ast} bound state
• Mass spectra and strong decays of charmed and charmed-strange mesons
• Understanding the newly observed ${\Xi }_c^0$ states through their decays
• Toward establishing the low-lying $P$-wave ${\Sigma }_b$ states
• $b$-hadron spectroscopy study based on the similarity of double bottom baryon and bottom meson
• Further understanding the nature of $\Omega (2012)$ within a chiral quark model
• Angular momentum coefficients for meson strong decay and unquenched quark models
• Spectroscopic Assignments of the Excited $B$-Mesons
• Study of B, Bs mesons using heavy quark effective theory
• Strong decays of $2^{+}$ charm and charm-strange mesons
• Toward establishing the low-lying $P$-wave excited ${\Sigma }_c$ baryon states
• The assignments of the bottom mesons within the screened potential model and ${}^3{P}_0$ model
• Semileptonic Decays of B Meson Transition Into D-wave Charmed Meson Doublets
• Strong decays of the low-lying $1P$- and $1D$-wave ${\Sigma }_c$ baryons
• Hadronic production of $D(2550)$, $D^{\ast }(2600)$, $D(2750)$, $D_1^{\ast }(2760)$ and $D_3^{\ast }(2760)$
• Hadronic decays of the highly excited $2D$ $D_s$ resonances
• Dynamical mixing between $2^3{S}_1$ and $1^3{D}_1$ charmed mesons
• The partial waves of $B_2^{\ast }(5747)$ and their contributions in strong decays
• Strong decays of excited $2^{+}$ charmed mesons
• Placing of the recently observed bottom strange state $B_{sJ}(6063)$ and $B_{sJ}(6114)$ in bottom spectra