Radiative Upsilon Decay at the Endpoint

Details Radiative Upsilon Decay at the Endpoint Radiative Upsilon Decay at the Endpoint

2002-07-19

arxiv.org/abs/hep-ph/0207245v1

Nucl.Phys.Proc.Suppl. 115 (2003) 183-186

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk at 5th International Conference on Hyperons, Charm and Beauty Hadrons (BEACH 2002), Vancouver, Canada, 25-29 Jun 2002

Scientific paper

10.1016/S0920-5632(02)01987-4

The standard NRQCD power counting breaks down and the OPE gives rise to color-octet shape functions at the upper endpoint of the photon energy spectrum in radiative Upsilon decay. Also in this kinematic regime, large Sudakov logarithms appear in the octet Wilson coefficients, ruining the perturbative expansion. Using SCET, the octet shape functions arise naturally and the Sudakov logarithms can be summed using the renormalization group equations. We derive an expression for the resummed octet energy spectrum.

Affiliated with

Also associated with

No associations

Rating

Radiative Upsilon Decay at the Endpoint does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Radiative Upsilon Decay at the Endpoint, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radiative Upsilon Decay at the Endpoint will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-397330