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9 research outcomes, page 1 of 1
  • publication . Preprint . 2020
    Open Access English
    Authors:
    Novichkov, P. P.; Penedo, J. T.; Petcov, S. T.;
    Project: EC | InvisiblesPlus (690575), EC | ELUSIVES (674896)

    We develop the formalism of the finite modular group $\Gamma'_4 \equiv S'_4$, a double cover of the modular permutation group $\Gamma_4 \simeq S_4$, for theories of flavour. The integer weight $k>0$ of the level 4 modular forms indispensable for the formalism can be eve...

  • publication . Preprint . Article . Other literature type . 2019
    Open Access English
    Authors:
    J.T. Penedo; S.T. Petcov;
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    Comment: 17 pages; Eq. 32 corrected, benchmarks updated accordingly; comments added; typos corrected

  • publication . Article . Preprint . Other literature type . 2018
    Open Access English
    Authors:
    Petcov, S.T.; Zhou, Ye-Ling;
    Publisher: Elsevier
    Project: EC | ELUSIVES (674896), EC | NUMASS (617143), EC | InvisiblesPlus (690575)

    Aspects of 3-neutrino mixing and oscillations in vacuum and in matter with constant density are investigated working with a real form of the neutrino Hamiltonian. We find the (approximate) equalities $\theta^m_{23} = \theta_{23}$ and $\delta^m = \delta$, $\theta_{23}$ (...

  • publication . Other literature type . Article . 2018
    Open Access
    Authors:
    Arsenii Titov;
    Publisher: American Physical Society (APS)
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    We consider the A4, S4, and A5 discrete lepton flavor symmetries in the case of 3-neutrino mixing, broken down to nontrivial residual symmetries in the charged lepton and neutrino sectors in such a way that at least one of them is a Z2. Such symmetry breaking patterns l...

  • publication . Preprint . Article . Other literature type . 2017
    Open Access English
    Authors:
    Arsenii Titov; João Penedo;
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    We consider a class of models of neutrino mixing with $S_4$ lepton flavour symmetry combined with a generalised CP symmetry, which are broken to residual $Z_2$ and $Z_2 \times H^\nu_{\rm CP}$ symmetries in the charged lepton and neutrino sectors, respectively, $H^\nu_{\...

  • publication . Article . Preprint . 2016
    Open Access English
    Authors:
    Petcov, S. T.;
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    Comment: 10 pages, 4 figures

  • publication . Article . Other literature type . Preprint . 2019
    Open Access English
    Authors:
    P.P. Novichkov; J.T. Penedo; S.T. Petcov; A.V. Titov;
    Publisher: SpringerOpen
    Project: EC | ELUSIVES (674896), FCT | UID/FIS/00777/2013 (147214), EC | InvisiblesPlus (690575)

    The formalism of combined finite modular and generalised CP (gCP) symmetries for theories of flavour is developed. The corresponding consistency conditions for the two symmetry transformations acting on the modulus $\tau$ and on the matter fields are derived. The implic...

  • publication . Article . Preprint . Other literature type . 2018
    Open Access
    Authors:
    Penedo, J.T.; Petcov, S.T.;
    Publisher: Elsevier BV
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    The observation of neutrinoless double beta decay would allow to establish lepton number violation and the Majorana nature of neutrinos. The rate of this process in the case of 3-neutrino mixing is controlled by the neutrinoless double beta decay effective Majorana mass...

  • publication . Article . Preprint . Other literature type . 2019
    Open Access English
    Authors:
    Novichkov, P.P.; Petcov, S.T.; Tanimoto, M.;
    Publisher: Elsevier
    Project: EC | ELUSIVES (674896), EC | InvisiblesPlus (690575)

    Comment: Figure is replaced. Discussions and References are added

9 research outcomes, page 1 of 1
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