Summary
We show that the dynamical breakdown of flavorSU(2) symmetry does not take place in quantum chromodynamics, thus confirming an assertion of Vafa and Witten. Our conclusion is also consistent with the conventional belief that symmetries are dynamically broken and nonchiral vectorlike symmetries are not realized as spontaneously broken symmetries.
Riassunto
Si mostra che la rottura dinamica della simmetriaSU(2) di sapore non avviene nella cromodinamica quantistica, confermando cosí un’asserzione di Vafa e Witten. La nostra conclusione è anche coerente con l’opinione convenzionale secondo cui le simmetrie chirali sono infrante dinamicamente e le simmetrie di tipo vettoriale non chirali non sono realizzate come simmetrie infrante spontaneamente.
Реэюме
Мы покаэываем, что в квантовой хромодинамике не происходит динамическое нарущениеSU(2) симметрии аромата. Этот реэультат подтверждает вывод Вафа и Виттена. Нащ вывод согласуется с обшепринятым мнением, что киральные симметрии являются динамически нарущенными и некиральные векторно-подобные симметрии не реалиэуются как спонтанно нарущенные симметрии.
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Acharya, R., Swamy, P.N. Dynamical flavorSU(2) breaking in quantum chromodynamics. Nuov Cim A 102, 747–756 (1989). https://doi.org/10.1007/BF02730747
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DOI: https://doi.org/10.1007/BF02730747