$X(3915)$ as a $D_s{\bar{D}}_s$ bound state

Abstract

We suggest that the observed properties of the charmoniumlike resonance $X(3915)$ can possibly be explained if it is an $S-$wave molecular bound state of $D_s{\bar{D}}_s$ meson pair with binding energy about 18\,MeV. In particular, the decays of $X(3915)$ to pairs of non-strange $D$ mesons are suppressed and proceed at a rate comparable to that of the decay $X(3915)\to \omega J/\psi$, whose branching fraction can be as large as about 0.3. Other major types of decay of $X(3915)$ with a comparable (or slightly smaller) rate are the transition $X(3915)\to \eta {\eta }_c$ and the decays into light hadrons due to the annihilation of the $c\bar{c}$ quark pair. The existence of a bound state should lead to an enhancement in the spectrum of the invariant mass for the $D_s{\bar{D}}_s$ near threshold in $B$ decays, e.g. in $B\to K{D}_s{\bar{D}}_s$ which enhancement can be tested experimentally.

arXiv comment8 pages

References in corpus (12)

• Observation of a near-threshold omega-J/psi mass enhancement in exclusive B-->K omega J/psi decays
• Evidence for the decay X(3872) --> J/psi omega
• Observation of Y(3940) -> J/psi omega in B -> J/psi omega K at BABAR
• Observation of a new D_sJ meson in B+->D0BD0K+ decays
• Observation of a charmonium-like enhancement in the gamma gamma --> omega J/psi process
• Radiative transitions from Upsilon(5S) to molecular bottomonium
• X(3915) and X(4350) as new members in P-wave charmonium family
• Where is the χ_{c0}(2P)?
• Study of X(3915) --> J/ψω in two-photon collisions
• Is the X(3915) the chi_{c0}(2P)?
• Search for B decays to final states with the eta_c meson
• Isospin violation in the yield of S-wave heavy meson pairs near threshold

Cited by in corpus (25)

• The hidden-charm pentaquark and tetraquark states
• Multiquark Resonances
• Non-Standard Heavy Mesons and Baryons, an Experimental Review
• Study of $e^{+}{e}^{-}\to \gamma \omega J/\psi$ and Observation of $X(3872)\to \omega J/\psi$
• ${\chi }_{c0}^{}(3915)$ As the Lightest $c\bar{c}s\bar{s}$ State
• Spectrum of the Hidden-Bottom and the Hidden-Charm/Strange Exotics in the Dynamical Diquark Model
• Exotic resonances due to $\eta$ exchange
• Establishing the heavy quark spin and light flavor molecular multiplets of the $X(3872)$, $Z_c(3900)$ and $X(3960)$
• Predicting the ${\bar{D}}_s^{(\ast )}{D}_s^{(\ast )}$ bound states as the partners of $X(3872)$
• Molecular Interpretation of $X(3960)$ as $D_s^{+}{D}_s^{-}$ State
• Understanding the $0^{++}$ and $2^{++}$ charmonium(-like) states near 3.9 GeV
• Production of exotic charmonium in $\gamma \gamma$ interactions at hadronic colliders
• Production rates of $D_s^{+}{D}_s^{-}$ and $D\bar{D}$ molecules in $B$ decays
• $X(3872)$, $X(4014)$, and their bottom partners at finite temperature
• Searching for charmoniumlike states with hidden $s\bar{s}$
• Charmonium spectrum with a Dirac potential model in the momentum space
• The scalar exotic resonances X(3915), X(3960), X(4140)
• Can X(3915) be the tensor partner of the X(3872)?
• Charmonium: Conventional and $XYZ$ States in a Relativistic Screened Potential Model
• Mass spectra of meson molecular states for heavy and light sectors
• A quark model study of strong decays of $X\left(3915\right)$
• Charmonium resonances on the lattice
• Exotic hadrons associated with $b$-quark
• Three-body final state interactions in $B^{+}\to D\bar{D}{K}^{+}$ decays
• First measurement of the Q^2 distribution of X(3915) single-tag two-photon production