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Tag: Quantum chromodynamics

  • Toponium masses estimated from QCD sum rules

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    What the study found The study estimates masses for purely top-quark bound states: pseudoscalar toponium (η_t), vector toponium (ψ_t), and the triply-top baryon (Ω_ttt). The authors report that the pseudoscalar toponium estimate is consistent with near-threshold events seen in recent experiments, and that the Ω_ttt central mass slightly exceeds the sum of the three top-quark…

  • PineAPPL and MATRIX are linked for NNLO interpolation grids

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    What the study found The study presents an interface between PineAPPL and Matrix that can calculate fully differential cross sections as interpolation grids with next-to-next-to-leading order (NNLO) accuracy in quantum chromodynamics (QCD, the theory of strong interactions) and next-to-leading order (NLO) accuracy in electroweak (EW) theory. Why the authors say this matters The authors say…