Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-04-15
Phys.Rev. D66 (2002) 074009
Physics
High Energy Physics
High Energy Physics - Phenomenology
Version coincident with the journal publication. LaTeX, 15 pages, 1 figure
Scientific paper
10.1103/PhysRevD.66.074009
The nonperturbative effects in the quark form factor are considered in the Wilson loop formalism. The properties of the Wilson loops with cusp singularities are studied taking into account the perturbative and nonperturbative contributions, where the latter are considered within the framework of the instanton liquid model. For the integration path corresponding to this form factor -- the angle with infinite sides -- the explicit expression for the vacuum expectation value of the Wilson operator is found to leading order. The calculations are performed in the weak-field limit for the instanton vacuum contribution and compared with the one- and two-loop order results for the perturbative part. It is shown that the instantons produce the powerlike corrections to the perturbative result, which are comparable in magnitude with the perturbative part at the scale of order of the inverse average instanton size. It is demonstrated that the instanton contributions to the quark form factor are exponentiated to high orders in the small instanton density parameter.
Cherednikov Igor O.
Dorokhov Alexander E.
No associations
LandOfFree
Instanton Contribution to the Quark Form Factor 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 Quark Form Factor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Instanton Contribution to the Quark Form Factor will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-383504