Two-Photon Decays of Charmonia from Lattice QCD

2006/07/31 by Jo Dudek, Jozef J. Dudek, Robert G. Edwards · 7 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph

paper · pdf · doi:10.1103/physrevlett.97.172001

published as Phys.Rev.Lett.97:172001,2006 · Replaced with version to be published in PRL. Expanded discussion of possible systematic errors

openalex publication_date 2006/10/23 · arxiv created 2006/10/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We make the first calculation in lattice QCD of two-photon decays of mesons. Working in the charmonium sector, using the Lehmann-Symanzik-Zimmermann reduction to relate a photon to a sum of hadronic vector eigenstates, we compute form factors in both the spacelike and timelike domains for the transitions \ensuremathη_c\ensuremath→\ensuremathγ^*\ensuremathγ^* and \ensuremathχ_c0\ensuremath→\ensuremathγ^*\ensuremathγ^*. At the on-shell point, we find approximate agreement with experimental world-average values.

Citations

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

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• Two-photon and two-gluon decays ofp-wave heavy quarkonium using a covariant light-front approach
• Exotic and excited-state radiative transitions in charmonium from lattice QCD