Power corrections to the process $γγ^*\to ππ$ in the Light-Cone Sum Rules approach

Details Power corrections to the process $γγ^*\to ππ$ in the Light-Cone Sum Rules approach Power corrections to the process $γγ^*\to ππ$ in the Light-Cone Sum Rules approach

2000-08-16

arxiv.org/abs/hep-ph/0008168v1

Eur.Phys.J.C18:107-116,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 6 figures

Scientific paper

10.1007/s100520000524

We applied QCD Light Cone Sum Rules to estimate power corrections to the helicity-conserving amplitude in the process $\gamma^*\gamma\to \pi\pi$. We found that above $Q^2 \sim 4$ GeV$^2$ power corrections are numerically small and the twist-2 part dominates.The amplitude can be reliably calculated in this region using models of $2 \pi$ distribution amplitudes as an input. We found that the magnitude of the NLO corrections depends rather strongly on the normalization of the gluonic distribution amplitude.

Affiliated with

Also associated with

No associations

Rating

Power corrections to the process $γγ^*\to ππ$ in the Light-Cone Sum Rules approach 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 Power corrections to the process $γγ^*\to ππ$ in the Light-Cone Sum Rules approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power corrections to the process $γγ^*\to ππ$ in the Light-Cone Sum Rules approach will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-674122