Meron

Short description: Half-instanton solution of Yang–Mills theory

A meron or half-instanton is a Euclidean space-time solution of the Yang–Mills field equations. It is a singular non-self-dual solution of topological charge 1/2. The instanton is believed to be composed of two merons.[1]

A meron can be viewed as a tunneling event between two Gribov vacua.[2] In that picture, the meron is an event which starts from vacuum, then a Wu–Yang monopole emerges, which then disappears again to leave the vacuum in another Gribov copy.

## See also

* BPST instanton
* Dyon
* Instanton
* Monopole
* Sphaleron

## References

1. ↑ Allan, Curtis (1977). "A Mechanism for Quark Confinement". Physics Letters 66B (4): 375–381. doi:10.1016/0370-2693(77)90019-3.
2. ↑ Actor, Alfred (1979). "Classical solutions of SU(2) Yang-Mills theories". Reviews of Modern Physics 51 (3): 461–525. doi:10.1103/RevModPhys.51.461. Bibcode: 1979RvMP...51..461A.

* Gauge Fields, Classification and Equations of Motion, Moshe Carmeli, Kh. Huleilil and Elhanan Leibowitz, World Scientific Publishing

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