Study of the reactions e+e−→2(π+π−)π0π0π0 and 2(π+π−)π0π0η at center-of-mass energies from threshold to 4.5 GeV using initial-state radiation

Citations Over TimeTop 10% of 2021 papers

Abstract

We study the processes e e - 2 - 0 0 0 and 2 - 0 0 in which an energetic photon is radiated from the initial state. The data were collected with the BABAR detector at SLAC. About 14 000 and 4700 events, respectively, are selected from a data sample corresponding to an integrated luminosity of 469 fb -1 . The invariant mass of the hadronic final state defines the effective e e -center-of-mass energy. The center-of-mass energies range from threshold to 4.5 GeV. From the mass spectra, the first ever measurements of the e e - 2 - 0 0 0 and the e e - 2 - 0 0 cross sections are performed. The contributions from - 0 0 , 2 -, and other intermediate states are presented. We observe the J= and 2S in most of these final states and measure the corresponding branching fractions, many of them for the first time.

Related Papers

• → Near Threshold Structures and Hadronic Molecules(2021)14 cited
• → Measurements of σ(e+e− → hadrons) and B(ψ(3770) → DD, non-DD)(2006)2 cited
• → Contribution of the two-photon annihilation process in the measurement of sigma/sub t/ (e/sup +/e/sup /minus//. -->. hadrons at PEP)(1988)
• → Study of the $\chi _{c1}(1P) \pi ^{+}\pi ^-$ invariant mass spectrum in $B^{±} \rightarrow \chi _{c1}(1P) \pi ^{+}\pi ^{-} K^{±}$ decays at Belle(2014)
• Semileptonic $B^{-}\to\pi^{+}\pi^{-}\ell^{-}\bar\nu_\ell$ decay with $\pi\pi$ invariant mass spectrum(2021)