Large mass expansion in two-loop QCD corrections of para-charmonium decay
| dc.creator | Hasegawa, K. | |
| dc.creator | Pak, Alexey | |
| dc.date | 2006-10-30 | |
| dc.date | 2008-01-16 | |
| dc.date.accessioned | 2026-07-07T11:27:14Z | |
| dc.date.available | 2026-07-07T11:27:14Z | |
| dc.description | We calculate the two-loop QCD corrections to paracharmonium decays $eta_{c} rightarrow gamma gamma$ and $eta_{c} rightarrow g g$ involving light-by-light scattering diagrams with light quark loops. Artificial large mass expansion and convergence improvement techniques are used to evaluate these corrections. The obtained corrections to the decays $eta_{c} rightarrow gamma gamma$ and $eta_{c} rightarrow g g$ account for $-1.25 %$ and $ -0.73 %$ of the leading order contribution, respectively. | |
| dc.description | 24 pages, 10 figures; REVTeX version; Version to appear in Phys. Rev. D, 9 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0610415 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0610415 | |
| dc.identifier | Phys.Rev.D77:017503,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.77.017503 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/196088 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Large mass expansion in two-loop QCD corrections of para-charmonium decay | |
| dc.type | text |