Resummation of QCD Corrections to the eta_c Decay Rate

Details Resummation of QCD Corrections to the eta_c Decay Rate Resummation of QCD Corrections to the eta_c Decay Rate

2001-06-08

arxiv.org/abs/hep-ph/0106095v3

Phys.Rev. D64 (2001) 114008

Physics

High Energy Physics

High Energy Physics - Phenomenology

41 pages, REVTEX, corrected minor typos in text

Scientific paper

10.1103/PhysRevD.64.114008

We examine the ratio of the decay rate of the eta_c into light hadrons to the decay rate into photons and find that most of the large next-to-leading-order (NLO) correction is associated with running of the strong coupling alpha_s. We resum such contributions by analyzing final-state chains of vacuum-polarization bubbles. We show that the nonperturbative parts of the bubble chains can be absorbed into a color-octet matrix element, once one has used contour deformations of the phase-space integrals to cancel certain contributions. We argue that these contributions are incompatible with the uncertainty principle. We also argue that perturbation theory is reliable only if one carries out the phase-space integrations before the perturbation summation. Our results are in good agreement with experiment and differ considerably from those that one obtains by applying the scale-setting method of Brodsky, Lepage, and Mackenzie to the NLO result.

Affiliated with

Also associated with

No associations

Rating

Resummation of QCD Corrections to the eta_c Decay Rate 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 Resummation of QCD Corrections to the eta_c Decay Rate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resummation of QCD Corrections to the eta_c Decay Rate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-409206