Helicity amplitude analysis of J/ψ andψ(2S)→Ξ(1530)Ξ

Abstract

We perform a helicity amplitude analysis for the processes of e + e − → J/ψ, ψ(2S) → Ξ(1530)Ξ(1530) → ππΞΞ → 4πΛΛ → 6πpp. The joint angular distribution for these processes are obtained, which allows a proper estimation of the detection efficiency using helicity amplitude information. In addition, the sensitivities of measurement of hyperon asymmetry decay parameters for these processes are discussed.

Electromagnetic Form Factor of Doubly-Strange Hyperon

“…In the context of QCD and even our understanding of the quark-gluon structure of hadrons, the study of EMFFs near the hyperon pair production threshold is particularly interesting for probing these anomalous phenomena [22][23][24][25]. Recently, the BESIII collaboration performed measurements of Born cross sections and EFFs for the processes e + e − → Ξ − Ξ+ and Ξ 0 Ξ0 based on a single hyperon tag method [26][27][28][29][30][31][32] using about 360 to 500 pb −1 data events collected at c.m. energies between 2.644 and 3.080 GeV [33,34].…”

Study of baryon pair production at BESIII

“…The studies of the baryon pair production in charmonium(-like) decays and in + − annihilation provide a rich laboratory to test the standard model, such as probing the limitation of the quark models and spotting unrevealed aspects of the QCD description of hadron resonances [1][2][3][4][5][6][7]. Figure 1 shows the Feynman diagram for the baryon pair production in charmonium(-like) decay and in + − annihilation.…”