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PhyStat-v Workshop on Statistical Issues in Experimental Neutrino Physics

30 May 2016 to 1 June 2016
Asia/Tokyo timezone

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Contribution List

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  1. 2. Introduction to Statistics for PhyStat-𝜈
    Louis Lyons (Imperial College London)
    30/05/2016, 09:00
  2. 1. Welcome to PhyStat-nu and Logistics
    Prof. Mark Hartz (Kavli IPMU (WPI), The University of Tokyo/TRIUMF)
    30/05/2016, 11:00
  3. 4. Introduction to the Workshop
    Dr Yoshi Uchida (Imperial College London)
    30/05/2016, 11:15
    Introduction of the format of the workshop and the invited experts and scientific organisers.
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  4. 3. The Current Status of Neutrino Physics
    Sergeuy Petcov
    30/05/2016, 11:25
  5. 5. Long-Baseline Accelerator Oscillation Experiments
    Dr Asher Kaboth (RHUL)
    30/05/2016, 13:30
  6. 6. Short- and Medium-Baseline Reactor Oscillation Experiments
    Sunny Seo (Seoul National University)
    30/05/2016, 14:10
  7. 7. Direct Neutrino Mass Measurements Using Weak Decays
    Dr Marco Kleesiek (KIT)
    30/05/2016, 15:20
  8. 35. Solar Neutrinos
    Dr Michael Smy (University of California, Irvine)
    30/05/2016, 16:00
  9. 43. Estimation of neutrino oscillation parameters with Markov Chain Monte Carlo
    Ms Leïla HAEGEL (Université de Genève)
    30/05/2016, 16:40
    PhyStat-nu
    Poster
    Short Poster Talks
    The T2K experiment is a long-baseline accelerator neutrino experiment with the ability to measure Δm32, θ23, θ13 and δCP from (anti-)νμ disappearance as well as (anti-)νe appearance. In this poster we show a Bayesian framework using the Metropolis-Hastings algorithm to estimate the oscillation parameters. The advantage of Markov Chain Monte Carlo is its ability to scan a multidimensional...
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  10. 24. Statistical techniques used for neutrino oscillation analyses with the VALOR framework
    Davide Sgalaberna (University of Geneva)
    30/05/2016, 16:46
    VALOR is a well established neutrino fitting group that is leading several neutrino oscillation analyses in T2K, producing world leading results. The analysis framework has been validated and optimised for both a hybrid Bayesian-Frequentist approach to fitting parameters, where the systematic parameters are marginalised, as well as a frequentist analysis, that consists of the likelihood ratio...
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  11. 28. Anti-𝜈e Appearance at T2K using VALOR
    Mr raj shah (STFC, UK)
    30/05/2016, 16:52
    VALOR is a well established neutrino fitting group that is leading several neutrino oscillation analyses in T2K, producing world leading results. The analysis framework has been validated and optimised for both a hybrid Bayesian-Frequentist approach to fitting parameters, where the systematic parameters are marginalised, as well as a frequentist analysis, that consists of the likelihood ratio...
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  12. 30. Tuning generators to the global neutrino cross-section dataset.
    Mr John Stowell (University of Sheffield)
    30/05/2016, 16:58
    The T2K Neutrino Oscillation Experiment uses a prior estimation of a scattering cross-section model when generating nominal Monte-Carlo (MC) neutrino interaction events. A selection of the available models in the NEUT MC generator are fit to a range of historical neutrino interaction cross-section measurements made external to T2K. A nominal model is then chosen which is capable of finding the...
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  13. 42. Empirical Parametrisations of Neutrino Oscillations
    Dr Phillip Litchfield (Imperial College London), Dr Phillip Litchfield (Imperial College London)
    30/05/2016, 17:04
    The discovery of neutrino oscillations driven by the U[e3] element of the PMNS mixing matrix has prompted a step change in the way neutrino oscillation experiments are analysed, commonly described by the shorthand of "switching from a 2-neutrino to 3-neutrino picture". The difference is less clear cut than this. On the one hand, some older measurements used parametrisations that implicitly...
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  14. 33. Neutrino Oscillation on Epicycles
    Benda Xu (RCNS, Tohoku Univ., Japan)
    30/05/2016, 17:10
    Global fit of neutrino oscillations is shown to be equivalent to Fourier transformation in a complex plane. Adding new sterile neutrinos or new oscillation modes is equivalent to adding Fourier components. Therefore new sterile neutrinos should be introduced with physics motivations beyond phenomenology.
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  15. 40. Study of the Neutrino Oscillation at Very Short Baseline
    Mr Youngju Ko (Chung-Ang University)
    30/05/2016, 17:16
    Verification of neutrino oscillations at a very short baseline of a nuclear reactor is one way to check the possible existence of the sterile neutrinos. Challenging features of this short baseline experiment come from: the high muon rates at shallow depth of overburden, the escaping gamma energy due to the small size of the detector in a limited space, and the inaccurate predictions of the...
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  16. 44. Optimization of detector design of NuPRISM, a new water-Cherenkov neutrino near-detector
    Tomoyo Yoshida (Tokyo Institute of Technology)
    30/05/2016, 17:22
    PhyStat-nu
    Poster
    Short Poster Talks
    NuPRISM is a proposed novel water Cherenkov detector in the J-PARC neutrino beam line that will make neutrino cross section measurements critical to both T2K and T2HK as well as searches for short baseline neutrino oscillations. By observing neutrino interactions over off-axis angles ranging from 1 to 4 degrees with NuPRISM detector, systematic uncertainties for T2K and T2HK oscillation...
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  17. 38. Boosted Decision Tree Approach to Track Finding in the COMET Experiment
    Mr Ewen Gillies (Imperial College London)
    30/05/2016, 17:28
    The Coherent Muon to Electron Transition (COMET) experiment is designed to search for muon to electron conversion, a process which has very good sensitivity to Beyond the Standard Model physics. The first phase of the experiment is currently under construction at J-PARC. This phase is designed to probe muon to electron conversion 100 times better than the current limit. The experiment will...
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  18. 45. Welcome from the Director
    Hitoshi Murayama (Kavli IPMU)
    30/05/2016, 17:40
  19. 9. Neutrino Nucleus Cross Section Experiments
    Dr Morgan Wascko (Imperial College London)
    31/05/2016, 09:00
  20. 34. Atmospheric Neutrinos
    Joao Pedro de Andre (Michigan State University)
    31/05/2016, 09:40
  21. 8. Double Beta Decay
    Dr Itaru Shimizu (Tohoku University)
    31/05/2016, 10:50
  22. 10. Combination of Current and Historical Cross Section Data
    Dr Callum Wilkinson (Bern)
    31/05/2016, 11:30
  23. 11. Statistical Issues in Neutrino Event Reconstruction
    Dr Richard Calland (IPMU)
    31/05/2016, 12:05
  24. 39. Searching for PeV neutrinos with IceCube
    Dr Lu Lu (Chiba University)
    31/05/2016, 14:00
    The IceCube Neutrino Observatory at the geographic South Pole has been taking high-quality data in the deep-ice since 2010. Extremely high energy neutrinos that carry energies above 1 PeV have been observed. The most constraining limits on the flux of ultra-high energy neutrinos, which could come from cosmogenic origins have been obtained based on a binned Poisson-likelihood-ratio method. In...
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  25. 12. Event Classification
    Shiro Ikeda (Institute of Statistical Mathematics)
    31/05/2016, 14:35
  26. 21. Computational Aspects of Statistical Methods
    Michael Betancourt (University of Warwick)
    31/05/2016, 15:10
  27. 13. Cosmological Constraints on Neutrino Properties
    Francisco Villaescusa-Navarro (INAF-Trieste)
    31/05/2016, 16:15
  28. 15. Three-Neutrino Mixing Fits
    Bergstrom Johannes (Universitat de Barcelona)
    31/05/2016, 16:50
  29. 19. Frequentist & Bayesian Bounds and Data Presentation
    Steve Biller (University of Oxford)
    31/05/2016, 17:25
  30. 14. Status of Global Sterile Neutrino Fits
    Gabriel Collin (Massachusetts Institute of Technology)
    01/06/2016, 09:00
  31. 41. Neutrino Mass Hierarchy at JUNO and Related Statistical Issues
    Yufeng Li (Institute of High Energy Physics)
    01/06/2016, 09:35
  32. 27. Sensitivity to the Neutrino Mass Hierarchy
    Emilio Ciuffoli (IMP, CAS)
    01/06/2016, 10:40
    Precisely one neutrino mass hierarchy is realized in nature. How can this crucial fact be incorporated into a statistical analysis of the mass hierarchy? It implies that the problem is not hypothesis testing, but rather model selection. The corresponding tools are standard, but different. We will discuss some statistical issues that will be relevant in this kind of experiment, present a...
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  33. 29. The KM3NeT/ORCA detector
    Dr Ronald Bruijn (University of Amsterdam/Nikhef)
    01/06/2016, 11:15
    The ORCA detector is the low-energy branch of the new generation neutrino telescope KM3NeT which is currently being constructed in the Mediterranean Sea. Interactions of neutrinos that are created in cosmic ray interactions travel and through the Earth can be observed in the detector. By measuring the matter-induced oscillation effects on this flux, KM3NeT/ORCA aims at settling the question...
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  34. 22. Generative Modelling as a Basis for Statistics
    Michael Betancourt (University of Warwick)
    01/06/2016, 11:50
  35. 26. Multiple Hypothesis Testing and Testing One Hypothesis Multiple Times: a unified (re)view
    Ms Sara Algeri (Imperial College London)
    01/06/2016, 12:30
    In statistics, the problem of testing one hypothesis multiple times can be formulated in terms of hypothesis testing when a nuisance parameter is present only under the alternative, also known as “look-elsewhere effect”. Each possible value of the nuisance parameter specifies a different alternative hypothesis and a unique global p-value is provided to summarize the statistical evidence in...
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  36. 36. Panel Discussion
    Dean Karlen (University of Victoria), Dr Elizabeth Worcester (BNL), Michael Betancourt (University of Warwick), Ms Sara Algeri (Imperial College London), Dr Yoshi Uchida (Imperial College London)
    01/06/2016, 14:15
  37. 17. Statistician's Summary
    David Van Dyk (Imperial College London)
    01/06/2016, 16:00
  38. 16. Physicist's Summary
    Robert Cousins (UCLA)
    01/06/2016, 16:45
  39. 18. Closing Statements
    01/06/2016, 17:30
  40. 23. Bayesian Non-Parametric Event Reconstruction in Super-Kamiokande
    Dr Richard Calland (IPMU)
    Talk
    The Super-Kamiokande collaboration is developing a new water cherenkov reconstruction package that uses a joint charge-time likelihood to reconstruct events. In the case of multiple rings, an optimization method scales poorly. This talk will detail the construction of the joint likelihood, and the application of a Bayesian technique (reversible jump MCMC) to sample the Posterior probability of...
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  41. 37. Direct neutrino mass measurements using weak decays
    Dr Marco Kleesiek (KIT)
    Talk
    Observations of neutrino oscillations have unambiguously proven that neutrinos have non-zero masses. Precision measurements of beta-decay kinematics represent the most promising model-independent approach to probing the extremely small absolute neutrino mass scale in a laboratory experiment. Direct neutrino mass experiments have a long history dating back to the late 40s, and the...
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  42. 32. Sensitivity to the Neutrino Mass Hierarchy
    Prof. Emilio Ciuffoli (IMP, CAS)
    Talk
    Precisely one neutrino mass hierarchy is realized in nature. How can this crucial fact be incorporated into a statistical analysis of the mass hierarchy? It implies that the problem is not hypothesis testing, but rather model selection. The corresponding tools are standard, but different. We will discuss some statistical issues that will be relevant in this kind of experiment, present a...
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  43. 20. Short Talks from Poster Presenters
  44. 0. Status of global sterile neutrino fits
    Mr Gabriel Collin (Massachusetts Institute of Technology)
    Tension among short baseline neutrino experiments has pointed toward the possible need for one or more additional mass splittings in the existing neutrino oscillation framework. This would require the addition of at least one sterile (non-interacting) neutrino to the current model. I will introduce models with one or more sterile neutrinos. The parameters of these models can be constrained...
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