Gauge covariant π—a1 diagonalization
Семинары
Лаборатория теоретической физики им. Н.Н. Боголюбова
Дата и время: пятница, 29 марта 2019 г., в 11:00
Место: Конференц-зал им. Блохинцева (4-й этаж), Лаборатория теоретической физики им. Н.Н. Боголюбова
Тема семинара: «Gauge covariant π—a1 diagonalization»
Докладчик: А.А. Осипов (ЛТФ ОИЯИ)
Аннотация:
An extended Nambu—Jona-Lasinio model with chiral group U(2) times U(2) and spin-0 and spin-1 four quark interactions is used to develop the gauge covariant approach to the diagonalization of
the π—a1 mixing in the presence of electroweak forces. This allows for manifestly gauge covariant description of both the non-anomalous and anomalous parts of the effective meson Lagrangian. It is shown that in the non-anomalous sector the theory is equivalent to the standard non-covariant approach. However, the theory differs from the standard one in the anomalous sector. Some straightforward applications are considered.