Surprises from Quarkonium Decay into Photons

Details Surprises from Quarkonium Decay into Photons Surprises from Quarkonium Decay into Photons

1994-10-27

arxiv.org/abs/hep-ph/9410394v1

Nucl.Phys.Proc.Suppl. 39BC (1995) 359-363

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages + 3 figures, uuencoded postscript, Cambridge preprint Cavendish-HEP-94/09

Scientific paper

10.1016/0920-5632(95)00101-E

The perturbative QCD approach to quarkonium decay into a photon and hadrons is reconsidered. It is shown that a consistent treatment within perturbative QCD calls for the introduction of a fragmentation contribution which has been neglected so far. The ensuing phenomenological implications are discussed, and, in particular, the possibility of measuring the gluon fragmentation function of the photon is addressed. *To appear in the proceedings of the workshop QCD94, Montpellier, July '94.

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