Geodesic
Nonconservation of fermion quantum numbers in the case of tunneling transitions in gauge theories
Teoretičeskaâ i matematičeskaâ fizika, Tome 73 (1987) no. 2, pp. 245-254

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Tunneling transitions between topologically distinct vacua are considered in the theory of gauge fields interacting with fermions. Using the technique of non-unitary Bogoliubov transformations it is shown that the creation of fermions occurs at the tunneling transitions which leads to nonconservation of fermion quantum numbers due to the triangle anomaly. 
@article{TMF_1987_73_2_a7,
     author = {G. V. Lavrelashvili},
     title = {Nonconservation of fermion quantum numbers in the case of tunneling transitions in gauge theories},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {245--254},
     publisher = {mathdoc},
     volume = {73},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_73_2_a7/}
}
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G. V. Lavrelashvili. Nonconservation of fermion quantum numbers in the case of tunneling transitions in gauge theories. Teoretičeskaâ i matematičeskaâ fizika, Tome 73 (1987) no. 2, pp. 245-254. http://geodesic.mathdoc.fr/item/TMF_1987_73_2_a7/