Instanton Contribution to the Pion Electro-Magnetic Formfactor at Q^2 > 1 GeV^2

Details Instanton Contribution to the Pion Electro-Magnetic Formfactor at Q^2 > 1 GeV^2 Instanton Contribution to the Pion Electro-Magnetic Formfactor at Q^2 > 1 GeV^2

2002-02-04

arxiv.org/abs/hep-ph/0202027v2

Phys.Rev. D67 (2003) 113009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 5 figures, minor revisions

Scientific paper

10.1103/PhysRevD.67.113009

We study the effects of instantons on the charged pion electro-magnetic formfactor at intermediate momenta. In the Single Instanton Approximation (SIA), we predict the pion formfactor in the kinematic region Q^2=2-15 GeV^2. By developing the calculation in a mixed time-momentum representation, it is possible to maximally reduce the model dependence and to calculate the formfactor directly. We find the intriguing result that the SIA calculation coincides with the vector dominance monopole form, up to surprisingly high momentum transfer Q^2~10 GeV^2. This suggests that vector dominance for the pion holds beyond low energy nuclear physics.

Affiliated with

Also associated with

No associations

Rating

Instanton Contribution to the Pion Electro-Magnetic Formfactor at Q^2 > 1 GeV^2 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 Instanton Contribution to the Pion Electro-Magnetic Formfactor at Q^2 > 1 GeV^2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Instanton Contribution to the Pion Electro-Magnetic Formfactor at Q^2 > 1 GeV^2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-345849