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We propose a new strategy for detecting the CP-violating phases and the effective mass of muon Majorana neutrinos by measuring observables associated with neutrino-antineutrino oscillations in $\pi^{\pm}$ decays. Within the generic…

High Energy Physics - Phenomenology · Physics 2011-09-28 David Delepine , Vannia Gonzalez Macias , Shaaban Khalil , Gabriel Lopez Castro

We have studied mixing and masses of three left handed Majorana neutrinos in the model, which assumes exactly degenerate neutrino masses at some "neutrino unification" scale. Such a simple theoretical ansatz naturally leads to…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. N. Ioannisian , N. A. Kazarian

If the present or upcoming searches for neutrinoless double beta decay give a positive result, the Majorana nature of massive neutrinos will be established. From the determination of the value of the effective Majorana mass parameter |<m>|,…

High Energy Physics - Phenomenology · Physics 2015-06-25 S. Pascoli , S. T. Petcov

We study decoherence effects on mixing among three generations of neutrinos. We show that in presence of a non--diagonal dissipation matrix, both Dirac and Majorana neutrinos can violate the $CPT$ symmetry and the oscillation formulae…

High Energy Physics - Phenomenology · Physics 2020-12-02 Luca Buoninfante , Antonio Capolupo , Salvatore M. Giampaolo , Gaetano Lambiase

We analyze many aspects of the phenomenon of the decoherence for neutrinos propagating in long baseline experiments. We show that, in the presence of an off-diagonal term in the dissipative matrix, the Majorana neutrino can violate the CP T…

High Energy Physics - Phenomenology · Physics 2019-05-22 A. Capolupo , S. M. Giampaolo , G. Lambiase

We hunt for and discuss manifestly CP-violating effects which are mediated by Majorana phases. These phases are present if the Standard Model neutrinos are Majorana particles. We argue that while Majorana phases do affect the strength of…

High Energy Physics - Phenomenology · Physics 2009-11-07 Andre de Gouvea , Boris Kayser , Rabindra Mohapatra

If the massive neutrinos are Majorana particles, neutrinoless double beta ($0\nu\beta\beta$) decay experiments are not enough to determine the Majorana phases. We carry out a systematic study of CP violation in neutrino-antineutrino…

High Energy Physics - Phenomenology · Physics 2013-10-23 Ye-Ling Zhou

In the framework of the left-right symmetric model the CP-parity violation has been studied in heavy Majorana neutrino decays $N\rightarrow e^{\mp} \mu^{\pm} n$. The numerical estimates of CP-asymmetry for different masses of neutrino and…

High Energy Physics - Phenomenology · Physics 2010-11-01 R. A. Alanakyan , H. M. Asatrian , A. N. Ioannisian , S. A. Chatrchyan

Some of the outstanding questions of particle physics today concern the neutrino sector, in particular whether there are more neutrinos than those already known and whether they are Dirac or Majorana particles.There are different ways to…

High Energy Physics - Phenomenology · Physics 2015-05-27 Gorazd Cvetic , Claudio Dib , C. S. Kim , Jilberto Zamora-Saa

If the massive neutrinos are the Majorana particles, how to pin down the Majorana CP-violating phases will eventually become an unavoidable question relevant to the future neutrino experiments. We argue that a study of neutrino-antineutrino…

High Energy Physics - Phenomenology · Physics 2013-04-03 Zhi-zhong Xing

The determination of CP violating phases in the Majorana neutrino mixing matrix using phenomenological constraints from neutrino oscillations, neutrinoless double beta decay, ($\mu^-, e^+$) conversion and few other processes is discussed.…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. K. Samal

Leptonic CP violation is one of the most important topics in neutrino physics. CP violation in the neutrino sector is strongly related to the nature of neutrinos: whether they are Dirac or Majorana particles. In \cite{Popov:2021icg} we have…

High Energy Physics - Phenomenology · Physics 2024-06-11 A. Popov , A. Studenikin

Assuming 3-neutrino mixing and massive Majorana neutrinos, we analyze the possibility of establishing the existence of CP-violation associated with Majorana neutrinos in the lepton sector i) by measuring of the effective Majorana mass |<m>|…

High Energy Physics - Phenomenology · Physics 2008-11-26 S. Pascoli , S. T. Petcov , W. Rodejohann

The CP violation effects in long baseline neutrino oscillations are studied in the framework of a four-neutrino model (three active neutrinos and one sterile neutrino). It is assumed that neutrino masses are devided into two nearly…

High Energy Physics - Phenomenology · Physics 2008-11-26 Anna Kalliomäki , Jukka Maalampi , Morimitsu Tanimoto

Leptonic CP violation is one of the most important topics in neutrino physics. CP violation in the neutrino sector is strongly related to the nature of neutrinos: whether they are Dirac or Majorana particles. In \cite{Popov:2021icg} we have…

High Energy Physics - Phenomenology · Physics 2023-02-14 Artem Popov , Alexander Studenikin

We analyze the dependence of the squared amplitudes on the rephasing-invariant CP-violating parameters of the lepton sector, involving Majorana neutrinos, for various lepton-conserving and lepton-violating processes. We analyze the…

High Energy Physics - Phenomenology · Physics 2014-11-17 Jose F. Nieves , Palash B. Pal

We calculate the radiative decay amplitude for Majorana neutrinos in trilinear R-parity violating supersymmetric framework. Our results make no assumption regarding the masses and mixings of fermions and sfermions. The results obtained are…

High Energy Physics - Phenomenology · Physics 2014-11-18 Gautam Bhattacharyya , Palash B. Pal , Heinrich Päs , Thomas J. Weiler

The effective Majorana mass which determines the rate of the neutrinoless double beta decay, |<m>|, is considered in the case of three-neutrino mixing and massive Majorana neutrinos. Assuming a rather precise determination of the parameters…

High Energy Physics - Phenomenology · Physics 2011-04-20 S. Pascoli , S. T. Petcov , L. Wolfenstein

Recently we proposed a framework for explaining the observed evidence for neutrino oscillations without enlarging the neutrino sector, by introducing CPT violating Dirac masses for the neutrinos. In this paper we continue the exploration of…

High Energy Physics - Phenomenology · Physics 2015-06-25 G. Barenboim , L. Borissov , J. Lykken

We show the possibility to discover the neutrino nature by measuring the Majorana CP phase at the DUNE experiment. This phase is turned on by a decoherence environment, possibly originated by physics at the Planck scale. A sizable…

High Energy Physics - Phenomenology · Physics 2021-10-19 J. C. Carrasco-Martínez , F. N. Díaz , A. M. Gago
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