Synthetic Running Coupling of QCD

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

9 pages, 1 figure, 1 table, some minor corrections, references added, accepted for publication in Few-Body Systems

Scientific paper

10.1007/s00601-006-0154-2

Based on a study of the analytic running coupling obtained from the standard perturbation theory results up to four-loop order, the QCD ``synthetic'' running coupling \alpha_{syn} is built. In so doing the perturbative time-like discontinuity is preserved and nonperturbative contributions not only remove the nonphysical singularities of the perturbation theory in the infrared region but also decrease rapidly in the ultraviolet region. In the framework of the approach, on the one hand, the running coupling is enhanced at zero and, on the other hand, the dynamical gluon mass m_g arises. Fixing the parameter which characterize the infrared enhancement corresponding to the string tension \sigma and normalization, say, at M_\tau completely define the synthetic running coupling. In this case the dynamical gluon mass appears to be fixed and the higher loop stabilization property of m_g is observed. For \sigma = (0.42 GeV)^2 and \alpha_{syn}(M^2_\tau) = 0.33 \pm 0.01 it is obtained that m_g = 530 \pm 80 MeV.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Synthetic Running Coupling of QCD 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 Synthetic Running Coupling of QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthetic Running Coupling of QCD will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-134946

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.