Scale Anomaly Induced Instanton Interaction

Details Scale Anomaly Induced Instanton Interaction Scale Anomaly Induced Instanton Interaction

1994-06-23

arxiv.org/abs/hep-ph/9406380v1

Phys.Lett. B333 (1994) 396-402

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 LaTex pages (3 figures available on request), in press by Physics Letters B, UNITUE-THEP-4-1994

Scientific paper

10.1016/0370-2693(94)90159-7

The binary interaction of large size instantons in a SU(2) Yang-Mills theory is obtained from the one-loop effective action for the field strength. The instanton interaction is calculated as a function of the instanton separation and in dependence on radius and relative orientation of the instantons. Two equally oriented instantons with radii large compared with the scale defined by the gluon condensate have purely attractive interaction, whereas the interaction of maximal disoriented instantons is repulsive. We argue that the medium range attractive interaction of the instantons generally holds and is solely due to the instability of the perturbative vacuum.

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