The hadronic decay of vector charmonium

2024/12/20 by Blossier, Benoît, Heitger, Jochen, Neuendorf, Jan +1
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2412.15915

Abstract

The extraction of decay parameters using lattice techniques is a computationally expensive task, requiring several volumes and group irreps to relate the spectrum on a lattice simulation to the infinite volume scattering. In this project we employ an alternative method based on a narrow-width approximation to extract the hadronic mixing <DD|ψ(3770)>, which is needed to compute the decay Γ(ψ(3770)→DD) between the second excited state of vector charmonium and a pair of D-mesons in a p-wave. We carry out our lattice simulations on two CLS ensembles at m_π∼ 440~MeV and a∼ 0.066~fm and obtain results compatible with experiment. Furthermore, we interpret our results analytically using the ³P₀ quark model.

Related

• Radiative decays of charmonia on the lattice
• The light meson decays of D wave charmonia
• Direct access to hadronic decay parameters with twisted boundary conditions
• In-medium decay widths of hidden and open charm vector mesons in a field theoretic model for composite hadrons
• Resonance parameters of the vector charmoniumlike state G(3900)