6th New Physics Opportunities at Neutrino Facilities Workshop (NPN2026)
The Hirosawa City Center (Mito Bunka Center)
This workshop is the sixth in the series New Physics Opportunities at Neutrino Facilities (NPN), which aims to bring together both theorists and experimentalists to actively discuss new physics opportunities at current and future neutrino facilities.
The primary focus of the NPN 2026 workshop will be on the present status and future directions of accelerator-based neutrino experiments. The workshop aims to provide a platform for detailed discussions on future experimental strategies, facility developments, and the synergies between different accelerator-based neutrino programs, with an emphasis on how they can collectively advance neutrino physics and searches for physics beyond the Standard Model.
Within this context, we aim to explore the physics landscape beyond the measurement of leptonic CP violation.
The NPN 2026 workshop will be held on May 26–28, 2026 in Mito, Ibaraki, Japan.
Acknowledgements:
This conference is supported by Kavli IPMU and Kakenhi International Leading Research (Grant #24K23938) funding.
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Registration
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S01: Plenary Session
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09:45
Searches for New Physics at Neutrino Experiments 40mSpeaker: Matheus Hostert (University of Iowa)
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10:25
Recent Neutrino Oscillation Results from JUNO 25mSpeaker: Benda Xu (Tsinghua University)
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Break 30m
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S02: Plenary Session
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11:20
Physics prospect and construction status of Hyper-Kamiokande 25mSpeaker: Hikaru Tanigawa (Keio University)
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11:45
Fermilab Long Baseline Experiments 35mSpeaker: Kendall Mahn (Michigan State University)
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Lunch Break 1h 40m
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S03: Plenary Session
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Physics with Intermediate Water Cherenkov Detector 25mSpeaker: Ryo Matsumoto (Institute of Science Tokyo)
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15:15
Search for millicharged particles at J-PARC (SUBMET) 25mSpeaker: Jae Hyeok Yoo (Korea University)
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15:40
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Break 30m
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S04: Plenary Session
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Relationship between 0nbb and LBL measurements 25mSpeaker: Masahiro Ibe (Institute for Cosmic Ray Research, University of Tokyo)
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New physics opportunity with HK and J-PARC neutrino beam 25mSpeaker: Volodymyr Takhistov (QUP, KEK)
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17:00
CPV precision measurement using the European Spallation Source neutrino Super Beam 25mSpeaker: Marcos Dracos (IPHC-IN2P3/CNRS)
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Discussion about white paper 25m
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S05: Plenary Session
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Current status and future idea of J-PARC accelerator 25mSpeaker: Takaaki Yasui (KEK)
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Coherent neutrino scattering for BSM prospects 25mSpeaker: Roger Wendell (Kyoto University)
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Break 30m
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C01: Contributed talk session
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Modified TM2 for Reproducing All Best-Fit Values of Neutrino Mixing Angles 18mSpeaker: Michael Fodroci (Tokai University)
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11:03
Testing the seesaw mechanism and leptogenesis at future accelerator-based experiments 18mSpeaker: Yannis Georis (Kavli IPMU)
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11:21
Bayesian Inference of Reheating Temperature in Thermal Leptogenesis 18mSpeaker: Shotaro Ieyasu (ICRR, The University of Tokyo)
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11:39
Probing Earth's Chemical Composition with Neutrino Oscillation Tomography 18mSpeaker: Shouvik Mondal (University of Utah)
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Lunch 1h 30m
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C02: Contributed talk session
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Development of a Target Protection System Based on Online Beam Diagnostics for MW Operation of the J-PARC Neutrino Beamline 18mSpeaker: Ayana Asai (Okayama University)
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nuSCOPE: a monitored and tagged neutrino beam facility at CERN for high-precision measurements 18mSpeaker: Adrien Blanchet (LPNHE / IN2P3)
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14:06
Operational Status and Timing Performance of the WAGASCI–BabyMIND Detector in the T2K Experiment 18mSpeaker: Daigo Hirata (Yokohama National University)
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Demonstration of Two Dimensional Muon Beam Profile Measurements by Electron Multiplier Tubes in the T2K Experiment 18mSpeaker: Sota Kobayashi (Tohoku University)
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Oxygen ion beam experiment for precise prediction of neutrino-oxygen quasielastic interactions 18mSpeaker: Yusuke Mizuno (The University of Tokyo)
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Break 25m
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C03: Contributed talk session
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Efficient modeling of flux correlations between multiple detection points in an accelerator neutrino beam towards model-independent measurements of neutrino-nucleus cross-section 18mSpeaker: Takehiro Ishida (Tohoku University)
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Exact Two-Zero Minor Texture Analyses in Neutrino Physics Are Incomplete: Impact on the Neutrino Mass Sum 18mSpeaker: Jun Miyamoto (Icrr, University of Tokyo)
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16:01
Unitarity test of lepton mixing via energy dependence of neutrino oscillation 18mSpeaker: Sho Sugama (Yokohama National University)
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Interaction of Dirac and Majorana fermions with delta-shaped defects 18mSpeaker: Anton Tarantin (Peter the Great St. Petersburg Polytechnic University)
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Break 25m
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C04: Contributed talk session
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Analysis Status of the 2025-2026 NINJA Physics Run 18mSpeaker: Naoki Otani (Kyoto University)
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17:20
Performance Evaluation for Hyper-Kamiokande digitizer 18mSpeaker: Minoru SEKIYAMA (UTokyo)
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17:38
Measurement of solar neutrino interaction rate below 3.49 MeV in Super-Kamiokande-IV 18mSpeaker: Alejandro Yankelevich (University of Toyama)
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19:00
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21:00
Banquet
A banquet is planned for the evening of May 27 (after the sessions). If you would like to participate, an additional fee will apply. The cost is 10,000 JPY. Please check if you would like to participate.
Place: Koubun Cafe (https://koubuncafe.com/)
Time: May 27 19:00 - 21:00
Menu:
Roasted Hitachi Beef Tenderloin with Red Wine Sauce and Fond de Veau
Authentic Snow Crab Cream Croquettes
Skillet-Grilled Coarsely Ground Sausage with Basil
Caesar Salad with Creamy Okukuji Eggs
Red Sea Bream Carpaccio with Special Soy Vinaigrette
Chef’s Special Seasonal Pasta (2 Varieties)
Shrimp Shumai in a Large Steamer Basket
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S06: Plenary and closing session
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Neutrino physics at future muon collider facilities 25mSpeaker: Ryuichiro Kitano (YITP, Kyoto U.)
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09:25
Muon Accelerator Development and Future Physics Opportunities (TBD) 25mSpeaker: Shusei Kamioka (KEK)
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09:50
New physics with LHC's forward beam: FASER(ν) and FPF 25mSpeaker: Akitaka Ariga (Chiba University (JP) and University of Bern (CH))
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NPN2027 (remote) 10m
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close 10m
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Discussion at J-PARC facility
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