A minimal Beta Beam with high-Q ions to address CP violation in the leptonic sector

The Daya Bay oscillation has recently reported the precise measurement of θ13≃8.8°±0.8° or θ13 ≠0 at 5.2 σ level. The observed nonzero θ13 can be accommodated by some general modifications to the democratic mixing matrix. Using such matrices we study the possibility of observing nonzero CP violation in the leptonic sector.

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PROBING CP VIOLATION IN THE NEUTRINO SECTOR WITH MAGIC BASELINE EXPERIMENTS

Modern Physics Letters A ◽

10.1142/s0217732311034566 ◽

2011 ◽

Vol 26 (03) ◽

pp. 205-213 ◽

Cited By ~ 2

Author(s):

RUKMANI MOHANTA ◽

DAUGHTY JOHN

Keyword(s):

Cp Violation ◽

Beam Energy ◽

Neutrino Beam ◽

Neutrino Masses ◽

Neutrino Sector ◽

Leptonic Sector ◽

Baseline Experiment

We investigate the effect of CP violation in the leptonic sector. Due to the tiny neutrino masses its value is predicted to be very small and it is far beyond the experimental reach of the current experiments. Recently, the magic baseline experiment from CERN to INO (Indian Neutrino Observatory) with L = 7152 km has been proposed to get a sensitive limit on sin θ13. We show that due to such magic baseline neutrino beam, it is possible to observe CP violation in the neutrino sector upto several percent for the beam energy between 1–10 GeV.

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Texture zero mass matrices and CP violation

International Journal of Modern Physics A ◽

10.1142/s0217751x17420052 ◽

2017 ◽

Vol 32 (16) ◽

pp. 1742005 ◽

Cited By ~ 2

Author(s):

Gulsheen Ahuja ◽

Samandeep Sharma

Keyword(s):

Cp Violation ◽

Viable Option ◽

Weak Basis ◽

Zero Mass ◽

Leptonic Sector ◽

Mass Matrices ◽

The Standard Model ◽

Texture Zero ◽

General Mass ◽

Invariant Parameter

Within the Standard Model, using the facility of making Weak Basis transformations, attempt has been made to examine the most general mass matrices within the texture zero approach. For the case of quarks, interestingly, one finds a particular set of texture four zero quark mass matrices emerging out to be a unique viable option for the description of quark mixing data as well as for accommodation of CP violation. Similarly, general lepton mass matrices, essentially considered as texture zero mass matrices, yield interesting bounds on the CP violating Jarlskog’s rephasing invariant parameter in the leptonic sector.

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Neutrino experiments: Hierarchy, CP, CPT

International Journal of Modern Physics A ◽

10.1142/s0217751x16300301 ◽

2016 ◽

Vol 31 (20n21) ◽

pp. 1630030

Author(s):

Manmohan Gupta ◽

Monika Randhawa ◽

Mandip Singh

Keyword(s):

Neutrino Physics ◽

Cp Violation ◽

Neutrino Oscillation ◽

Neutrino Mass ◽

Cpt Violation ◽

Leptonic Sector ◽

Neutrino Experiments

We present an overview of our recent investigations regarding the prospects of ongoing neutrino experiments as well as future experiments in determining few of the most important unknowns in the field of neutrino physics, specifically the neutrino mass ordering and leptonic CP-violation phase. The effect of matter oscillations on the neutrino oscillation probabilities has been exploited in resolving the degeneracy between the neutrino mass ordering and the CP violation phase in the leptonic sector. Further, we estimate the extent of extrinsic CP and CPT violation in the experiments with superbeams as well as neutrino factories.

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An SU(2) ⊗ U(1) model with massive neutrinos and CP violation in the leptonic sector

Annals of Physics ◽

10.1016/0003-4916(83)90058-1 ◽

1983 ◽

Vol 146 (1) ◽

pp. 221

Keyword(s):

Cp Violation ◽

Leptonic Sector ◽

Massive Neutrinos

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CP VIOLATION IN NEUTRINO MIXING MATRIX AND LEPTOGENESIS

Modern Physics Letters A ◽

10.1142/s0217732301003528 ◽

2001 ◽

Vol 16 (09) ◽

pp. 603-613 ◽

Cited By ~ 5

Author(s):

YONG LIU ◽

UTPAL SARKAR

Keyword(s):

Cp Violation ◽

Invariant Measures ◽

Lepton Number ◽

Effective Theory ◽

Neutrino Mixing ◽

Lepton Asymmetry ◽

Mixing Angles ◽

Leptonic Sector ◽

Mixing Matrix ◽

Lepton Number Violating

The CP violation required in leptogenesis may have different origin, but in an effective theory they are all related to the rephasing invariant CP violating measures in the mixing matrix of the leptonic sector. We point out that with our present knowledge of the mixing angles it is possible to estimate the maximum allowed value for all the rephasing invariant measures of CP violation in the leptonic sector. In the effective three-generation scenario there are three CP violating rephasing invariant measures. We show that only one rephasing invariant measure enters the lepton number conserving processes while the other two enter the lepton number violating processes. In the bimaximal mixing case, the lepton number conserving measure of CP violation vanishes while the two lepton number violating rephasing invariant measures of CP violation remain nonzero, which could contribute to the lepton asymmetry of the universe.

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Revisiting CP violation in the CKM paradigm

International Journal of Modern Physics A ◽

10.1142/s0217751x18440335 ◽

2018 ◽

Vol 33 (31) ◽

pp. 1844033

Author(s):

Manmohan Gupta ◽

Gulsheen Ahuja ◽

Nikhila Awasthi ◽

Aakriti Bagai

Keyword(s):

Cp Violation ◽

Neutrino Oscillations ◽

Leptonic Sector

The implications of precision CKM measurements have been examined on the CKM paradigm as well as the CP violating parameters. Similarly, the implications of the precision neutrino oscillations measurements for the Dirac-like CP violating phase in the leptonic sector have been investigated.

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