Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-05
Phys.Rev.D83:013006,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 8 figures
Scientific paper
10.1103/PhysRevD.83.013006
The transverse charge density in the pion can be represented as a dispersion integral of the imaginary part of the pion form factor in the timelike region. This formulation incorporates information from e+e- annihilation experiments and allows one to reconstruct the transverse density much more accurately than from the spacelike pion form factor data alone. We calculate the transverse density using an empirical parametrization of the timelike pion form factor and estimate that it is determined to an accuracy of ~10% at a distance b ~ 0.1 fm, and significantly better at larger distances. The density is found to be close to that obtained from a zero-width rho meson pole over a wide range and shows a pronounced rise at small distances. The resulting two-dimensional image of the fast-moving pion can be interpreted in terms of its partonic structure in QCD. We argue that the singular behavior of the charge density at the center requires a substantial presence of pointlike configurations in the pion's partonic wave function, which can be probed in other high-momentum transfer processes.
Miller Gary A.
Strikman Mark
Weiss Carsten
No associations
LandOfFree
Pion transverse charge density from timelike form factor data 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 Pion transverse charge density from timelike form factor data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pion transverse charge density from timelike form factor data will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-455365