Study ofψ(2S)decays toγpp¯,

Fine structure of the cross sections of e+e− annihilation near the thresholds of pp¯ and nnMilstein1, Salnikov2 2018Nuclear Physics A242321View full textAdd to dashboardCite

“…Namely, in this region the cross sections strongly depend on the energy. Similar effects have also been observed in the decays J/ψ(ψ ) → ppπ 0 (η) [10][11][12] and J/ψ(ψ ) → ppω(γ) [11,[13][14][15][16].…”

Categorizing resonancesX(1835),X(2120), andXYu1, Sun2, Liu3 et al. 2011Phys. Rev. D651620View full textAdd to dashboardCite

“…Later, the CLEO Collaboration also reported the observation of Xð1860Þ [14] as an independent confirmation of this enhancement. Combining the Xð1860Þ signal with the later observed Xð1835Þ by BES-II, it was conjectured that these two structures might be originated from the same resonant state.…”

From the γγ→pp¯ reaction to the production of pp¯ pairs in

“…In principle, also subthreshold resonances, such as f 2 (1270), may play some, even an important, role. It is worth to mention that our knowledge about the f 2 (1950) resonance comes from the BES [22] and the CLEO [23] analyses for ψ(2S) → γpp radiative decays. In [23] the authors include also the f 2 (2150) → pp contribution in order to describe the M pp and M pγ invariant mass distributions.…”