A first-principles lattice QCD calculation gives Gamma(chi_c1 to J/psi gamma) = 0.3265(79) MeV and a2 = -0.0666(22), consistent with experiment and far more precise than prior lattice results.
M2 signatures in psi(2S) radiative decays
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
The sensitivity of observables in radiative decays psi(2S) -> gamma chi_{1,2} -> gamma gamma J/psi to quadrupole (M2) admixtures in the dominant electric dipole (E1) transitions is explored. Emphasis is placed on distributions in a single angle, and several examples are given.
citation-role summary
background 1
citation-polarity summary
fields
hep-lat 1years
2025 1verdicts
ACCEPT 1roles
background 1polarities
unclear 1representative citing papers
citing papers explorer
-
Lattice QCD study of the $\chi_{c1}\to J/\psi \, \gamma$ decay
A first-principles lattice QCD calculation gives Gamma(chi_c1 to J/psi gamma) = 0.3265(79) MeV and a2 = -0.0666(22), consistent with experiment and far more precise than prior lattice results.