Vafa–Witten theorem

Short description: Theorem concerning spontaneous symmetry breaking

This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. (April 2021) (Learn how and when to remove this template message)

|

In theoretical physics, the Vafa–Witten theorem, named after Cumrun Vafa and Edward Witten, is a theorem that shows that vector-like global symmetries (those that transform as expected under reflections) such as isospin and baryon number in vector-like gauge theories like quantum chromodynamics cannot be spontaneously broken as long as the theta angle is zero. This theorem can be proved by showing the exponential fall off of the propagator of fermions.

## See also

* F-theory

## References

* "Restrictions on symmetry breaking in vector-like gauge theories". Nuclear Physics B 234 (1): 173–188. 1984. doi:10.1016/0550-3213(84)90230-X.
* "Parity Conservation in Quantum Chromodynamics". Phys. Rev. Lett. 53 (6): 535–536. August 1984. doi:10.1103/PhysRevLett.53.535. Bibcode: 1984PhRvL..53..535V.

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/Vafa–Witten theorem. Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Physics:Vafa–Witten_theorem&oldid=4108450"