1,721,100 research outputs found
Checking Flavour Models at Neutrino Facilities
No full textAbstractIn the recent years, the industry of model building has been the subject of the intense activity, especially after the measurement of a relatively large values of the reactor angle. Special attention has been devoted to the use of non-abelian discrete symmetries, thanks to their ability of reproducing some of the relevant features of the neutrino mixing matrix. In this Letter, we consider two special relations between the leptonic mixing angles, arising from models based on S4 and A4, and study whether, and to which extent, they can be distinguished at superbeam facilities, namely T2K, NOνA and T2HK
Neutrinos as a probe of physics beyond the standard model
Full text linkPresented at the final meeting of the European Network "Physics at Colliders", Montpellier, France, september 26-27, 2004.Neutrino physics plays a very important role in understanding several aspects of fundamental physics. In this short review, we revise three different aspects connected to them. Neutrino oscillations at low energy (up to few GeV) offer the possibility to study possible leptonic CP violation whereas at ultra-high energy (Eν > 103 TeV) they could enable to check scenarios of Physics Beyond the Standard Model involving extra-dimensions. On the other hand, e+e− colliders can help in detecting new heavy Majorana neutrinos suggested by Grand Unified Theories with masses of O(102 GeV).This work has been supported by the European Community’s Human Potential Programme under contract HPRN-CT-2000-00149
Solving the octant degeneracy with the silver channel
No full textAbstractWe study the potential of the combination of the golden (νe→νμ) and silver (νe→ντ) channels to solve the octant degeneracy affecting the measurement of θ13 and δ at future neutrino factories. To search for τ leptons produced in ντ charged-current interactions, we consider two different detectors: the Emulsion Cloud Chamber detector (ECC) and the Liquid Argon Time Projection Chamber (LAr TPC). We show that, when using similar detector masses, the upgraded version of the ECC detector (sensitive also to hadronic τ decay modes) and the LAr TPC detector have comparable sensitivities to the octant of θ23, being able to discriminate the two solutions for sin2(2θ13)≳10−3 at 3σ level if θ23=40°. We also show that the same setups are able to see deviation from maximal mixing as small as ∼ (4–6)% (at 3σ) if θ13 is close to its upper bound
S-3 as a flavour symmetry for quarks and leptons after the Daya Bay result on theta(13)
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