Search for CP violation in the lepton sector

Abstract

One of the major open issues in neutrino physics is the possible existence of CP violation in the neutrino sector. Such an observation would have an important impact in various domains of physics, from high energy physics to cosmology. Its search requires future accelerator neutrino facilities producing intense and pure neutrino beams such as "beta-beams". Here we review the different beta-beam scenarios proposed so far and discuss the present status, with a particular emphasis on the original baseline scenario and its feasibility. Alternative strategies for the CP violation search are to be pursued as well. A possibility is to search for CP violation effects in astrophysical environments. Here we present recent analytical and numerical results obtained in the context of core-collapse supernovae. In particular, we point out the conditions under which there can be CP violating effects in dense media and show numerical results on the supernova (anti-)neutrino fluxes and on the electron fraction, relevant for the r-process nucleosynthesis.

12 pages

References in corpus (21)

• Physics potential of the CERN-MEMPHYS neutrino oscillation project
• Sensitivity of low energy neutrino experiments to physics beyond the standard model
• Resolving parameter degeneracies in long-baseline experiments by atmospheric neutrino data
• Collective neutrinos oscillation in matter and CP-violation
• How astrophysical neutrino sources could be used for early measurements of neutrino mass hierarchy and leptonic CP phase
• Neutrino beams as a probe of the nuclear isospin and spin-isospin excitations
• Possible CP-Violation effects in core-collapse Supernovae
• Contrasting solar and reactor neutrinos with a non-zero value of theta13
• Alternating ions in a $\beta$-beam to solve degeneracies
• Three Flavor Neutrino Oscillations in Matter: Flavor Diagonal Potentials, the Adiabatic Basis and the CP phase
• Unraveling neutrino parameters with a magical beta-beam experiment at INO
• Reconstructing supernova-neutrino spectra using low-energy beta-beams
• Untangling supernova-neutrino oscillations with beta-beam data
• Optimized Two-Baseline Beta-Beam Experiment
• Exceptional Sensitivity to Neutrino Parameters with a Two Baseline Beta-Beam Set-up
• A Conserved Vector Current test using low energy beta-beams
• A combined beta-beam and electron capture neutrino experiment
• SUSY radiative corrections on mu-tau neutrino refraction including possible R-parity breaking interactions
• Low-energy neutrinos at off-axis from a standard beta-beam
• Energy Dependence of CP-Violation Reach for Monochromatic Neutrino Beam
• Exploring neutrino parameters with a beta-beam experiment from FNAL to DUSEL