Mass Matrix of Majorana Neutrinos

نویسندگان

  • Takeshi FUKUYAMA
  • Hiroyuki NISHIURA
چکیده

We present a massive Majorana neutrino model and see how it is constrained from the solar and atmospheric neutrino deficit experiments. This model incorporates the seesaw mechanism and Peccei-Quinn symmetry. Its consequence to the neutrinoless double beta decay is also discussed.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

FCNC, CP violation, and impure Majorana neutrinos

The tree level diagonalization of a neutrino mass matrix with both Majorana and Dirac masses is discussed in a general context. Flavor changing neutral currents in such models are inevitable. Rephasing invariant quantities characterizing CP violation in FCNC FermionHiggs interactions are identified. At the one loop level, the mass eigenstates become of an impure Majorana type. The Possibility o...

متن کامل

Massive and Massless Neutrinos on Unbalanced Seesaws

The observation of neutrino oscillations requires new physics beyond the standard model (SM). A SM-like gauge theory with p lepton families can be extended by introducing q heavy right-handed Majorana neutrinos but preserving its SU(2)L×U(1)Y gauge symmetry. The overall neutrino mass matrix M turns out to be a symmetric (p+q)×(p+q) matrix. Given p > q, the rank of M is in general equal to 2q, c...

متن کامل

CP Violation and Baryogenesis due to Heavy Majorana Neutrinos

We analyze the scenario of baryogenesis through leptogenesis induced by the out-ofequilibrium decays of heavy Majorana neutrinos and pay special attention to CP violation. Extending a recently proposed resummation formalism for two-fermion mixing to decay amplitudes, we calculate the resonant phenomenon of CP violation due to the mixing of two nearly degenerate heavy Majorana neutrinos. Solving...

متن کامل

How a Non-hierarchical Neutrino Mass Matrix Can Arise

One puzzle of neutrino masses and mixings is that they do not exhibit the kind of strong “hierarchy” that is found for the quarks and charged leptons. Neutrino mass ratios and mixing angles are not small. A possible reason for this is proposed here. It is based on the fact that typical realistic grand unified models contain particles with unification-scale masses which, when integrated out, can...

متن کامل

2 Can radiative correction cause large neutrino mixing ?

We investigate whether radiative corrections can be responsible for the generation of large mixing in a pair of degenerate neutrino with same CP parity. We find that this mechanism is fine tuned and doesn’t work for arbitrary mixing at the high scale. The data from the solar neutrino and the atmospheric neutrino experiments can be explained through flavor oscillations of massive neutrinos. The ...

متن کامل

Majorana neutrinos and their electromagnetic properties

To help develop a picture of Majorana neutrinos, we study their electromagnetic properties. We show' that CPT invariance forbids a Majorana neutrino from having a magnetic or electric dipole moment. Then, by considering the process y~vV, we find the most general expression for the matrix element of the electromagnetic current of a Majorana neutrino. The result is verified in a way which leads u...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1997