Cross section measurements of $e^{+}{e}^{-}\to K^{+}{K}^{-}{K}^{+}{K}^{-}$ and $\varphi K^{+}{K}^{-}$ at center-of-mass energies from 2.10 to 3.08 GeV

Abstract

We measure the Born cross sections of the process $e^{+}{e}^{-}\to K^{+}{K}^{-}{K}^{+}{K}^{-}$ at center-of-mass (c.m.) energies, $\sqrt{s}$, between 2.100 and 3.080 GeV. The data were collected using the BESIII detector at the BEPCII collider. An enhancement at $\sqrt{s}=2.232$ GeV is observed, very close to the $e^{+}{e}^{-}\to \Lambda \overline{\Lambda }$ production threshold. A similar enhancement at the same c.m. energy is observed in the $e^{+}{e}^{-}\to \varphi K^{+}{K}^{-}$ cross section. The energy dependence of the $K^{+}{K}^{-}{K}^{+}{K}^{-}$ and $\varphi K^{+}{K}^{-}$ cross sections differs significantly from that of $e^{+}{e}^{-}\to \varphi {\pi }^{+}{\pi }^{-}$.

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• The Y(2175) State in the QCD Sum Rule
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• STCF Conceptual Design Report: Volume 1 -- Physics & Detector
• Observation of a resonant structure in $e^{+}{e}^{-}\to \omega \eta$ and another in $e^{+}{e}^{-}\to \omega {\pi }^0$ at center-of-mass energies between 2.00 and 3.08 GeV
• Observation of a structure in $e^{+}{e}^{-}\to \varphi {\eta }^{\prime }$ at $\sqrt{s}$ from 2.05 to 3.08 GeV
• Mass spectrum and strong decays of strangeonium in a constituent quark model
• $S$- and $P$-wave fully-strange tetraquark states from QCD sum rules
• Nature of the vector resonance $Y(2175)$
• Measurement of the Born cross sections for $e^{+}{e}^{-}\to {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ at center-of-mass energies between $2.00$ and $3.08$ GeV
• Study of the process $e^{+}{e}^{-}\to \varphi \eta$ at center-of-mass energies between 2.00 and 3.08 GeV
• Light unflavor vector meson spectroscopy around the mass range of $2.4\sim 3$ GeV and possible experimental evidence
• Electromagnetic form factors of $\Lambda$ hyperon in the vector meson dominance model and a possible explanation of the near-threshold enhancement of the $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$ reaction
• Cross section measurement of $e^{+}{e}^{-}\to K_S^0{K}_L^0$ at $\sqrt{s}=2.00-3.08\mathrm{GeV}$
• Strangeonium-like hybrids on the lattice
• Toward $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ annihilation inspired by higher $\rho$ mesonic states around 2.2 GeV
• Reconciling the X(2240) with the Y(2175)
• Understanding oscillating features of the timelike nucleon electromagnetic form factors within the extending vector meson dominance model
• Natural explanation of recent results on $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$
• The fully-light vector tetraquark states with explicit P-wave via the QCD sum rules
• The ground states and the first radially excited states of D-wave vector $\rho$ and $\varphi$ mesons
• Role of $4S$-$3D$ mixing in explaining the $\omega$-like $Y(2119)$ observed in $e^{+}{e}^{-}\to \rho \pi$ and $\rho (1450)\pi$