Non-Minimal Approximation for the Type-I Seesaw Mechanism

Авторы: Dubinin M., Fedotova E.
Журнал: Symmetry
Том: 15
Номер: 3
Год издания: 2023
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Первая страница: 1
Последняя страница: 15
DOI: 10.3390/sym15030679
Аннотация: A non-minimal approximation for effective masses of light and heavy neutrinos in the framework of a type-I seesaw mechanism with three generations of sterile Majorana neutrinos which recover the symmetry between quarks and leptons is considered. The main results are: (a) the next-order corrections to the effective mass matrix of heavy neutrinos due to terms O(theta M_D) are obtained, which modify the commonly used representation for the effective mass (MD is a Dirac neutrino mass when the electroweak symmetry is spontaneously broken); and (b) the general form of the mixing matrix is found in non-minimal approximation parametrized by a complex 3*3 matrix satisfying a nontrivial constraint. Numerical analysis within the nMSM framework demonstrates the very small effect of new contributions of direct collider observables as opposed to their possible significance for cosmological models.
Добавил в систему: Федотова (Петрова) Елена Юрьевна

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