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Neutrino mass hierarchy, status of the flavor problem (discussion session)

Neutrino mass hierarchy, status of the flavor problem (discussion session). Invisibles 2013 July 15-19, 2013 Durham , United Kingdom Walter Winter Universität Würzburg. TexPoint fonts used in EMF: A A A A A A A A. Mass hierarchy?. There is a new kid in town!. Mass hierarchy: PINGU?.

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Neutrino mass hierarchy, status of the flavor problem (discussion session)

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  1. Neutrino mass hierarchy,status of the flavor problem(discussion session) Invisibles 2013 July 15-19, 2013 Durham, United Kingdom Walter Winter Universität Würzburg TexPoint fonts used in EMF: AAAAAAAA

  2. Mass hierarchy? There is a new kidin town!

  3. Mass hierarchy: PINGU? W. Winter, arXiv:1305.5539, PRD(~20 string version, full three flavor, full parameter degeneracy, GLoBES) PINGU official, arXiv:1306.5846 (similar sensitivity obtainedby Blennow, Schwetz, 1306.3988;Choubey confirms …)

  4. Mass hierarchy: Summary?

  5. Impact of “newcomers“? • Elisa Resconi: "How would the beam strategy change if the mass hierarchy came from PINGU/ORCA?" • Looked into that, in particular, in LBNE reconfiguration report (T2HK: no effect)http://www.fnal.gov/directorate/lbne_reconfiguration/files/LBNE-Reconfiguration-Steering-Committee-Report-August2012.pdf • Conclusions (if MH dropped): • In phase I, Fermilab  Soudan (underground) clearly preferred (“broadest phase I physics program“, astrophysics) • But: no upgrade beyond 1.1 MW • Preferance of FNAL-Homestake unchanged!?

  6. A theorist‘s dream?Beam to South Pole (PINGU) • L ~ 11800 km from FNAL, CERN, JHF etc to South Pole • Flux x param. resonance x Megaton detector = Mass hierarchy with short pipe beam Core W. Winter, arXiv:1305.5539, PRD

  7. q13: impact on theory of flavor? q13 ? very small very large Structure:A4 TBM, S4, … Anarchy:Randomdraw of matrix? vs. Tri-bimaximal mixings:Dead or alive?What are the minimalrequirements for a successful state-of-the-artflavor model? Fixes: Some structure + randomness:Froggatt-Nielsen? Corrections?CL sector?RGR running? Quark-leptoncomplementarity:q13 ~ qC? Different flavor symmetry?

  8. CP phase • Measurement requires (most probably) new long-baseline experiment • How much precision does one actually need? • Consequences of d measurement for … • Leptogenesis? • Flavor models? • Lepton flavor violation, other observables? • Sum rules: charged lepton vs neutrino mixing matrix? • There seems to be increasing awareness in theory/model community (q13 known reduces the d.o.f. …) to describe origin: “Geometric“? Random O(1) complex Yukawa? From SSB? … • However: my impression in many models: phases just “mess up things“! • Transition of awareness needed?

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