Two Photon Decays of Charmonia from Lattice QCD - INSPIRE

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Two Photon Decays of Charmonia from Lattice QCD

Jozef J. Dudek
(
- Jefferson Lab
)
,
Robert G. Edwards
(
- Jefferson Lab
)

Jul, 2006

5 pages

Published in:

Phys.Rev.Lett. 97 (2006) 172001

e-Print:

hep-ph/0607140 [hep-ph]

DOI:

10.1103/PhysRevLett.97.172001

Report number:

JLAB-THY-06-512

View in:

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Abstract:

We make the first calculation in lattice QCD of two-photon decays of mesons. Working in the charmonium sector, using the LSZ reduction to relate a photon to a sum of hadronic vector eigenstates, we compute form-factors in both the space-like and time-like domains for the transitions

\eta_c \to \gamma^* \gamma^*

and

\chi_{c0} \to \gamma^* \gamma^*

. At the on-shell point we find approximate agreement with experimental world-average values.

12.38.Gc
13.25.Gv
12.40.Vv
charmonium
quarkonium: radiative decay
form factor: decay
amplitude analysis: decay
lattice field theory
quantum chromodynamics
vector dominance

References(9)

Figures(0)

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