BESIII observes a new Ξ(1720) hyperon with J^P = 3/2+ in J/ψ → K− Σ0 Ξ̄+ decays at >10σ significance, mass 1721 MeV/c², width 31 MeV, and branching fraction 2.68×10^{-5}.
Wang, Progress in FDC project, Nucl
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abstract
The FDC is a general-purpose program package for Feynman Diagram Calculation. We outline previous successes in calculations and focus on its recent progress about automatic deduction the Feynman rules for first principle model, especially for the supersymmetric model, proper evaluation of the rates of multi-final-particle processes and the event generators in the SM and MSSM. A few special applications are presented. The FDC-homepage shows an automatic translation of the FDC results into the HTTP version.
years
2026 2representative citing papers
Direct gamma-gluon fusion dominates B_c photoproduction in ep collisions, with resolved gluon-gluon contributing O(10%) at low p_T across HERA to EIC energies.
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Observation of a Doubly-strange Hyperon $\Xi(1720)$ in $J/\psi\rightarrow{}K^{-}\Sigma^0\bar{\Xi}^{+}+c.c.$
BESIII observes a new Ξ(1720) hyperon with J^P = 3/2+ in J/ψ → K− Σ0 Ξ̄+ decays at >10σ significance, mass 1721 MeV/c², width 31 MeV, and branching fraction 2.68×10^{-5}.
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Resolved photoproduction of the $B_c$ meson in electron-proton collisions
Direct gamma-gluon fusion dominates B_c photoproduction in ep collisions, with resolved gluon-gluon contributing O(10%) at low p_T across HERA to EIC energies.