1st Workshop on Physics
with a high intensity proton source, November 16-17 (Friday-Saturday), 2007
organized by Fermilab UEC and Fermilab

Questions raised by the community and answers

Neutrino Physics
  • Would needs of a multi-megawatt intense proton source (like Project X) be dependent on sin213 value?
    1. 0.05 < sin213 < 0.1
      • We will observe sin213 by ~2012 by MINOS + Double Chooz + T2K.
      • Other measurements (CP violation, etc.) to be made, so we will need an intense proton source.
    2. 0.03 < sin213 < 0.05
      • We will observe sin213 by ~2015 by Double Chooz + Daya Bay + T2K + NOvA.
      • Other measurements (CP violation, etc.) to be made, so we will need an intense proton source.
    3. 0.001 < sin213 < 0.03
      • An intense proton source is needed to measure sin213.
      • Whether or not we need a very long baseline program and a huge detector will depend on the value of sin213.
    Detectors (size and distance) may be influenced by the value of sin213, but an intense proton source like Project X will be needed regardless of the value.

  • Why isn't neutrino mixing just more Standard Model physics? It's just like quark mixing? What's new about CP phases in the neutrino sector, beyond that seen in the quarks?

  • Why is neutrino mass 'beyond the Standard Model', or more importantly a sign of new physics, not just a trivial modification of the V-A Standard Model. What's new about neutrino mass?

  • What are differences between the Fermilab option and the Japanese option?

Precision Physics
  • General
    • The physics case needs to take into account complementarity with LHC, especially for precision physics. How will the sensitivity of rare K decays and lepton violation in muon decays be important, given that the virtual effects of new particles may be directly studied by LHC? The case for helping LHC to unravel the details of what is observed at LHC may strengthen the case.
  • Muons
    • More is better, but what is the beam power threshold or What is the threshold sensitivity?
    • Some model calculations as compared to what we can do would be good.
    • What is the number of possible thesis topics for a mu-to-e conversion experiment?
  • Kaons
    1. What is the status of non-Fermilab experiments?
    2. More is better, but what is the beam power threshold or What is the threshold sensitivity?
    3. Studies are needed to better understand the roles of the two K --> pi nu nu modes in probing non-standard model physics. In particular, it would be helpful to quantify their relative sensitivities and the extent to which they are complementary to one another. Moreover, comparisons to analogous studies using rare B decays are also needed.
    4. On the experimental side, the projected sensitivities go well beyond what has been achieved thus far and a considerable amount of work is needed to establish that the detectors can accommodate the rates, and that backgrounds can be reduced to levels commensurate with the anticipated statistical sensitivities.
    5. What can we expect in various cases as opposed to how well we will mesure?
    6. What are theory errors?
    7. For a model comparison, what happens if we assume supersymmetry but with minimal flavor violation, which seems to be gaining popularity given the lack of new physics showing up at the B factories?
         Preliminary answers - in progress

  • Charms
    • What is the threshold sensitivity?
    • The charm quark provides a sensitive probe of physics beyond the standard model. Project X allows a Tevatron charm fixed target program. A study is needed of the relative sensitivity of this program compared to other programs.