Enrico Fermi had to cajole his friend Ettore Majorana into publishing his big idea: a modification of the Dirac equation that would have profound ramifications for particle physics. Shortly afterwards, in 1938, Majorana mysteriously disappeared, and for 70 years his modified equation remained a rather obscure footnote in theoretical physics (Box 1). Now suddenly, it seems, Majorana’s concept is...

We analyse the dependence of the rates of the LFV charged lepton decays µ → e + γ, τ → e+γ, τ → µ+γ (l i → l j +γ) and their ratios, predicted in the class of SUSY theories with seesaw mechanism of ν-mass generation and soft SUSY breaking with universal boundary conditions at the GUT scale, on the Majorana CP-violation phases in the PMNS neutrino mixing matrix and the " leptogenesis " CP-violat...

Recently, a lot of attention has been payed to the study of a possible connection between thermal leptogenesis and neutrino masses [2], mixing and leptonic CP violation [3]. For instance, it is now known that an acceptable value for the baryon asymmetry of the Universe (BAU) requires the low-energy Majorana neutrinos to be lighter than 0.12 − 0.15 eV. Moreover, successful thermal leptogenesis i...

The electric dipole moment of the electron, de, is known to vanish up to threeloops in the standard model with massless neutrinos. However, if neutrinos are massive Majorana particles, we obtain the result that de induced by leptonic CKM mechanism is non-vanishing at two-loop order, and it applies to all massive Majorana neutrino models.

We determine the possible values of the effective Majorana neutrino mass |〈m〉| = |∑j U2 ejmj| in the different phenomenologically viable three and four-neutrino scenarios. The quantities Uαj (α = e, μ, τ, . . .) denote the elements of the neutrino mixing matrix and the Majorana neutrino masses mj ∗Also at: Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, BG-1784,...

We give an accurate historical and scientific account of a previously unknown manuscript written by Ettore Majorana in French. The retrieved text deals with Quantum Electrodynamics by using the formalism of field quantization, and it is here reported, for the first time, in translation. It is likely related to an invited talk for a conference at Leningrad (or Kharkov) in 1933 (or 1934) which, h...

the aim of our work was to compare cytotoxic and membrane-damaging effects of o. majorana l. essential oil and linalool on hep g2 and to investigate their possible protective (antioxidant) effects against h2o2 induced membrane damage. the oils were investigated by gc and gc-ms and antioxidant activity was evaluated by dpph and -carotene–linoleic acid assays. assessment of cell viability was ma...

That a Majorana neutrino theory is different from a Dirac neutrino theory (even in the zero mass limit) is proved in two sentences. Fermion Statistics For the reactions (Dirac) e + e − → ν ¯ ν and (Majorana) e + e − → νν wherein the two final particles are presumed to have opposite helicity, in the Dirac case the neutrino and anti-neutrino are different particles so that Ψ Dirac (p 1 , λ 1 ; ¯ ...

This paper explains a method of constructing algebras, starting with the properties discrimination in elementary discrete systems. We show how to use points view about these systems construct what we call iterant algebras and naturally give rise complex numbers, Clifford matrix algebras. The discusses structure Schrödinger equation, Dirac equation Majorana equations, finding solutions via nilpo...

Citation Chamon, C. et al. " Quantizing Majorana fermions in a superconductor. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. A Dirac-type matrix equation governs...