Manifest<i>CP</i>violation from Majorana phases

Gouvêa, André de; Kayser, Boris; Mohapatra, Rabindra N.

doi:10.1103/physrevd.67.053004

Cited by 156 publications

(125 citation statements)

References 41 publications

Supporting

Mentioning

119

Contrasting

Order By: Relevance

“…In other words, 0νββ processes do not manifestly exhibit the violation of CP. Still, processes like neutrino ↔ antineutrino oscillation and rare leptonic decays of K and B mesons (e.g., K ± → π ∓ l ± l ± and similar modes for the B meson) can actually be sensitive to Majorana-type CPV (de Gouvea et al, 2003).…”

Section: Neutrinoless Double Beta Decaymentioning

confidence: 99%

LeptonicCPviolation

Branco¹,

Felipe

Joaquim³

2012

Rev. Mod. Phys.

202

188

View full text Add to dashboard Cite

Several topics on CP violation in the lepton sector are reviewed. A few theoretical aspects concerning neutrino masses, leptonic mixing, and CP violation will be covered, with special emphasis on seesaw models. A discussion is provided on observable effects which are manifest in the presence of CP violation, particularly, in neutrino oscillations and neutrinoless double beta decay processes, and their possible implications in collider experiments such as the LHC. The role that leptonic CP violation may have played in the generation of the baryon asymmetry of the Universe through the mechanism of leptogenesis is also discussed.

show abstract

Section: Neutrinoless Double Beta Decaymentioning

confidence: 99%

LeptonicCPviolation

Branco¹,

Felipe

Joaquim³

2012

Rev. Mod. Phys.

202

188

View full text Add to dashboard Cite

show abstract

“…In the context of LRSM, EDM is a manifestly CP-odd process sensitive to Majorana and Dirac phases, complementary to [38]. This can easily be checked using the example of Eq.…”

mentioning

confidence: 99%

Connecting Dirac and Majorana Neutrino Mass Matrices in the Minimal Left-Right Symmetric Model

2013

View full text Add to dashboard Cite

Probing the origin of neutrino mass by disentangling the seesaw mechanism is one of the central issues of particle physics. We address it in the minimal left-right symmetric model and show how the knowledge of light and heavy neutrino masses and mixings suffices to determine their Dirac Yukawa couplings. This in turn allows one to make predictions for a number of high and low energy phenomena, such as decays of heavy neutrinos, neutrinoless double beta decay, electric dipole moments of charged leptons and neutrino transition moments. We also discuss a way of reconstructing the neutrino Dirac Yukawa couplings at colliders such as the LHC.

show abstract

“…This is an advantage over the oscillation experiments. Additionally, such an event will give us a handle on the magnitude of the CP phases, which might lead to CP odd effects at an observable level [16]. Finally, we point out that following the WMAP results [14] a lot of enthusiasm has been generated towards a close scrutiny of neutrinoless double beta decay (some of these references are contained in [35]).…”

Section: Normal Hierarchymentioning

confidence: 99%

“…But the effect is CP-even, i.e., the rate of this decay in a nucleus will be the same, in principle, to that in an antinucleus. The CP-odd effect that these Majorana phases might cause have been studied in the context of neutrino ↔ antineutrino oscillation, rare leptonic decays of the K and B mesons, and leptogenesis (for a recent discussion on this issue, see [16]). …”

mentioning

confidence: 99%

Impact ofCPphases on neutrinoless double beta decay

Abada

Bhattacharyya

2003

Phys. Rev. D

View full text Add to dashboard Cite

We highlight in a model independent way the dependence of the effective Majorana mass parameter, relevant for neutrinoless double beta decay, on the CP phases of the PMNS matrix, using the most recent neutrino data including the cosmological WMAP measurement. We perform our analysis with three active neutrino flavours in the context of three kinds of mass spectra: quasi-degenerate, normal hierarchical and inverted hierarchical. If a neutrinoless double beta decay experiment records a positive signal, then assuming that Majorana masses of light neutrinos are responsible for it, we show how it might be possible to discriminate between the three kinds of spectra. PACS number(s): 14.60.Pq, 23.40.-s.The importance of looking for neutrinoless double beta decay (0νββ) lies in the fact that, if observed, it would establish a violation of the total lepton number, which is otherwise a conserved quantum number in the standard model. Any nonvanishing amplitude for this decay may be inferred as a signal for an effective Majorana mass of the electron neutrino. This way it is sensitive to some kind of an absolute mass of the neutrino, contrary to the oscillation experiments, which can fix only the neutrino mass squared differences. An evidence for this decay has recently been claimed on the basis of results from Heidelberg-Moscow experiments [1]. This claim has been criticized by authors in [2], which has subsequently been followed by a reply to the criticism made [3]. In any case, the currently running NEMO3 experiment [4] and future [5] (Majorana, EXO, CUORICINO, CUORE, GENIUS) (0νββ) experiments would either confirm this evidence or would put a stronger bound on the amplitude of this decay. The rate of (0νββ) is proportional to the square of the (ee)-element of the neutrino mass matrix, often called the effective mass parameter m ee . This parameter depends on the absolute neutrino masses, the solar and CHOOZ mixing angles, and two CP phases. A detailed discussion of the dependence of m ee on different parameters may be found, e.g., in [6,7].The purpose of this short note is to highlight in a model independent way the dependence of m ee on the CP phases, using the most recent oscillation data on mass square splittings and mixing angles [8,9,10,11,12,13], as well as the recent cosmological bound from WMAP on the sum of all neutrino masses [14] in conjunction with data from 2dF galaxy redshift survey (2dFGRS) [15]. We base our 1 analysis on the three possible kinds of mass spectra: quasi-degenerate, hierarchical and inverted hierarchical, in the context of three neutrino generations. The (0νββ) experiment in a sense serves to distinguish between the spectra: due to the present sensitivity, its observation in the ongoing (0νββ) experiment, as it would turn out, would only establish a nearly degenerate mass spectrum.We stress at this point that even though the (0νββ) amplitude does depend on the CP phases, this decay does not correspond to a manifest CP-violating phenomenon. The rate of this decay is indeed affected by ...

show abstract

ManifestCPviolation from Majorana phases

Cited by 156 publications

References 41 publications

LeptonicCPviolation

LeptonicCPviolation

Connecting Dirac and Majorana Neutrino Mass Matrices in the Minimal Left-Right Symmetric Model

Impact ofCPphases on neutrinoless double beta decay

Contact Info

Product

Resources

About