Cross section measurements of e+eK+KK+Ke^{+}e^{-} \to K^{+}K^{-}K^{+}K^{-} and ϕK+K \phi K^{+}K^{-} at center-of-mass energies from 2.10 to 3.08 GeV

Collaboration
Jul 13, 2019
11 pages
Published in:
  • Phys.Rev.D 100 (2019) 3, 032009
  • Published: Aug 31, 2019
e-Print:
Experiments:

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Abstract: (APS)
We measure the Born cross sections of the process e+e-→K+K-K+K- at center-of-mass (c.m.) energies, s, between 2.100 and 3.080 GeV. The data were collected using the BESIII detector at the BEPCII collider. An enhancement at s=2.232  GeV is observed, very close to the e+e-→ΛΛ¯ production threshold. A similar enhancement at the same c.m. energy is observed in the e+e-→ϕK+K- cross section. The energy dependence of the K+K-K+K- and ϕK+K- cross sections differs significantly from that of e+e-→ϕπ+π-.
  • Particle Physics Experiments
  • electron positron: annihilation
  • electron positron: colliding beams
  • K: multiple production
  • Phi(1020): electroproduction
  • Phi(1020): hadronic decay
  • threshold: production
  • enhancement
  • K: particle identification
  • mass spectrum: (K+ K-)