Goal of discussion was to identify the most promising ways
to make the case for a high precision neutrino-oscillation programme if θ13 is measured to be
large, sind
shown to be non-zero, and the mass hierarchy measured. Brief notes on the
topics felt to be most promising follow. Those present agreed to a follow up
meeting in order to prepare for a more detailed discussion at the
Key topics to be studied for the case of large θ13, sind known to be non-zero, and the mass hierarchy measured:
● Deviation from maximal atmospheric mixing – is q23 equal to 45°. What precision on q23 is required to rule out class(es) of model? What is the precision with which the proposed future facilities can make this measurement?
● Antusch, King commented that there are sum rules relating d, θ12, and θ13. With what precision must these parameters (or combinations of them) be measured to rule out classes of model? What is the precision with which the proposed future facilities can make these measurements?
● Is there a process within the MSSM that can be used to demonstrate the connection between possible discoveries at the LHC (H ® l+l- for example) which can be probed via long baseline neutrino oscillation measurements. If there is, what is the precision required to make a contribution? What is the precision with which the proposed future facilities can make this measurement?
● Note added when writing this up:
The case for high flux B-physics experiment includes the need to study the penguin diagrams. The loops in penguins are (presumably) closely related to the loops in rare muon decays, and perhaps to flavour violating in charged lepton scattering. Shouldn’t we seek an equivalent illustrative example of a relation between measurements of penguin contributions at LHCb and elsewhere and our muon physics and neutrino oscillation areas?
● Relations between the quark and lepton mixing parameters prediction by theories which include family or flavour symmetries. What are the mixing angle relations and what is the precision with which the mixing angles have to be measured to make a contribution? What is the precision with which the proposed future facilities can make these measurements?
● What is the precision with which the unitarity sums should be measured to contribute to finding the correct model? What are the constraints on the detection of (for example) tau neutrinos? What is the precision with which the proposed future facilities can make these measurements?
● S.Antusch, S.King: Review models and the prediction for mixing angles etc. that they make so that we can begin to define the target measurables and precisions for model killing. The goal was to develop a more complete table of the form that was produced for the FNAL proton-driver workshop (see page 14 of hep-ex/0509019).
● A.Donnini: Check connection between H ® l+l- in the MSSM and θ13.
● P.Huber, K.Long: Contact M.Lindner to solicit a brief review of the APS physics study (hep-ex/0509019) at our next phone meeting.
It was agreed that the next phone meeting would be on the 21Feb06 at 13h30 GMT.