Exclusive processes in position space and the pion distribution amplitude

Details Exclusive processes in position space and the pion distribution amplitude Exclusive processes in position space and the pion distribution amplitude

2007-09-10

arxiv.org/abs/0709.1348v1

Eur.Phys.J.C55:349-361,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 10 figures

Scientific paper

10.1140/epjc/s10052-008-0608-4

We suggest to carry out lattice calculations of current correlators in position space, sandwiched between the vacuum and a hadron state (e.g. pion), in order to access hadronic light-cone distribution amplitudes (DAs). In this way the renormalization problem for composite lattice operators is avoided altogether, and the connection to the DA is done using perturbation theory in the continuum. As an example, the correlation function of two electromagnetic currents is calculated to the next-to-next-to-leading order accuracy in perturbation theory and including the twist-4 corrections. We argue that this strategy is fully competitive with direct lattice measurements of the moments of the DA, defined as matrix elements of local operators, and offers new insight in the space-time picture of hard exclusive reactions.

Affiliated with

Also associated with

No associations

Rating

Exclusive processes in position space and the pion distribution amplitude 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 Exclusive processes in position space and the pion distribution amplitude, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exclusive processes in position space and the pion distribution amplitude will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-656049