Suppression of the S-wave production of (3/2)^+ + (1/2)^- heavy meson pairs in e^+e^- annihilation

Abstract

The heavy meson-antimeson pairs, where one is an excited $(\frac{3}{2}{)}^{+}$ meson and the other is a ground state $(\frac{1}{2}{)}^{-}$ meson, namely the pairs ($D_1(2420)\bar{D}$ + c.c.), ($D_1(2420){\bar{D}}^{\ast }$ + c.c.), ($D_2(2460){\bar{D}}^{\ast }$ + c.c.) in the charm sector and ($B_1(5721)\bar{B}$ + c.c.), ($B_1(5721){\bar{B}}^{\ast }$ + c.c.), ($B_2(5747){\bar{B}}^{\ast }$ + c.c.) in the bottom sector, are allowed, by the quantum numbers, to be produced in the $S$ wave in $e^{+}{e}^{-}$ annihilation. We show, however, that such $S$-wave production is forbidden by the heavy quark spin symmetry. Thus the yield of the considered meson pairs in $e^{+}{e}^{-}$ annihilation should be significantly suppressed near the respective thresholds. In our view, this substantially weakens the arguments for considering the Y(4260) charmonium-like resonance as a $D_1\bar{D}$ molecular state.

6 pages, 1 figure

References in corpus (6)

• Charmonium
• Hadro-Charmonium
• Are Y(4260) and {\rm Z${}_2^{+}$(4250)} ${\mathrm{D}}_1\mathrm{D}$ or ${\mathrm{D}}_0{\mathrm{D}}^{\ast }$ Hadronic Molecules?
• Production of the X(3872) in charmonia radiative decays
• Exploring the threshold behavior and implications on the nature of Y(4260) and $Z_c(3900)$
• A Study of P-wave Heavy Meson Interactions in A Chiral Quark Model

Cited by in corpus (28)

• Hadronic molecules
• The $XYZ$ states: experimental and theoretical status and perspectives
• $Y(4260)$ as the first $S$-wave open charm vector molecular state?
• Y(4260) and Y(4360) as mixed hadrocharmonium
• Y(4260): hadronic molecule versus hadro-charmonium interpretation
• Production of $Y(4260)$ as a hadronic molecule state of $\bar{D}{D}_1+c.c.$ in $e^{+}{e}^{-}$ annihilations
• Investigating possible decay modes of $Y(4260)$ under the $D_1(2420)\bar{D}+c.c$ molecular state ansatz
• Strong decays of the $XYZ$ states
• Influence of threshold effects induced by charmed meson rescattering
• Is $Z_{cs}(3982)$ a molecular partner of $Z_c(3900)$ and $Z_c(4020)$ states?
• Prediction of an exotic state around 4240 MeV with $J^{PC}=1^{-+}$ as C-parity partner of Y(4260) in molecular picture
• $X(4260)$ Revisited: A Coupled Channel Perspective
• $P$-wave coupled channel effects in electron-positron annihilation
• Hunting for the $X_b$ via hidden bottomonium decays
• Reanalysis of the $e^{+}{e}^{-}\to (D^{\ast }{\bar{D}}^{\ast }{)}^{\pm }{\pi }^{\mp }$ reaction and the claim for the $Z_c(4025)$ resonance
• Searching for charmoniumlike states with hidden $s\bar{s}$
• Disentangling the role of the $Y(4260)$ in $e^{+}{e}^{-}\to D^{\ast }{\bar{D}}^{\ast }$ and $D_s^{\ast }{\bar{D}}_s^{\ast }$ via line shape studies
• Production of the spin partner of the X(3872) in e^+e^- collisions
• Production of the $Z_b^{(\prime )}$ states from the ${\rm Y}(5S,6S)$ decays
• ${\rm Y}(6S)$ and triangle singularity in $e^{+}{e}^{-}\to B_1(5721)\bar{B}\to Z_b(10610)\pi$
• Are the XYZ states unconventional states or conventional states with unconventional properties?
• Model-independent predictions for decays of hidden-heavy hadrons into pairs of heavy hadrons
• Search for $J^{PC}=1^{-+}$ exotic state in $e^{+}{e}^{-}$ annihilation
• QCD string in excited heavy-light mesons and heavy-quark hybrids
• Resonance parameters of the vector charmoniumlike state $G(3900)$
• Quark model description of $\psi (4260)$
• Some properties of the states at the hidden-strangeness mixed ${\frac{1}{2}}^{+}+{\frac{1}{2}}^{-}$ heavy meson pair threshold in $e^{+}{e}^{-}$ annihilation
• Coupled-channel study of $4S$-$3D$ mixing dynamics in $\psi (4220)$ and $\psi (4380)$