New determination of inclusive electromagnetic decay ratios of heavy quarkonium from QCD

Yuichiro Kiyo, Antonio Pineda, Adrian Signer

Research output: Contribution to journalArticleResearchpeer-review

20 Citations (Scopus)

Abstract

We consider a different power counting in potential NRQCD by incorporating the static potential exactly in the leading order Hamiltonian. We compute the leading relativistic corrections to the inclusive electromagnetic decay ratios in this new scheme. The effect of this new power counting is found to be large (even for top). We produce an updated value for the ηb decay to two photons. This scheme also brings consistency between the weak coupling computation and the experimental value of the charmonium decay ratio. © 2010 Elsevier B.V.
Original languageEnglish
Pages (from-to)231-256
JournalNuclear Physics B
Volume841
Issue number1-2
DOIs
Publication statusPublished - 1 Dec 2010

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