Skip to content
DraconiticResearch
Search Sources API
206,690 studies31 sourcesUpdated 15 min ago
PreprintarXiv licencearXiv

The Koto II experiment

  • Silvia Martellotti
Open at sourcePDFDOICite

Abstract

KL → π0νν̅ is a golden mode for flavour physics: it is highly suppressed in the Standard Model, with a predicted branching ratio of 3 × 10−11 and a theoretical uncertainty of just 2\%, and is therefore extremely sensitive to new physics. The KOTO experiment at J-PARC is searching for this decay. Using the data taken in 2021, it has set the most stringent upper limit to date of 2.2 × 10−9 on the branching ratio at 90\% C.L. We present KOTO II, a next-generation experiment at J-PARC proposed in 2024, which aims to measure the KL → π0νν̅ branching ratio with a sensitivity below 10−12 in the 2030s.

Related

  1. Gain-Switched Sub-Nanosecond Mid-Infrared Cr:ZnSe Lasers: Experiment, Modeling, and Energy Scaling
    Rem Danilin, Daniil Danilin, Saugat Ghimire +4
    Optics ExpressPeer-reviewedLicence not statedOptics & photonicsCrossref
  2. Deblocking a confined experiment: Comprehensive scaled model tests of a Vertical-Axis Cross-Flow Tidal Turbine
    Timo Gerdes Bennecke, Karla Ruiz-Hussmann, Pierre-Luc Delafin +3
    HALPreprintPublisher termsFull textFluid dynamicsHAL
  3. An iterative method bridging DFT, disorder averaging, and experiment in intercalated materials: application to Au-intercalated graphene
    Poonam Kumari, Alberto Zobelli, Igor de Melo Froldi +3
    HALPreprintLicence not statedGeneral physicsHAL
  4. High-energy nanosecond pulse extraction in a 40 µm core REPUSIL erbium-doped PM fiber: modeling and experiment
    S. Vidal, V. Freysz, M. Zambelli +5
    Applied opticsPeer-reviewedPublisher termsFull textGeneral physicsHAL
  5. GNN-based track reconstruction for MUonE experiment
    Damian Mizera, Mateusz Goncerz, Izabela Juszczak +3
    arXivPreprintCC BY 4.0Full textHigh-energy & particle physicsarXiv

Cite

BibTeXRIS
BibTeX
@misc{martellotti2026koto,
  title = {{The Koto II experiment}},
  author = {Silvia Martellotti},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.08514},
  eprint = {2611.08514},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.08514},
}
RIS
TY  - UNPB
TI  - The Koto II experiment
AU  - Silvia Martellotti
PY  - 2026
DA  - 2026/11/01
PB  - arXiv
DO  - 10.48550/arxiv.2611.08514
UR  - https://arxiv.org/abs/2611.08514
AB  - K_L → π^0νν̅ is a golden mode for flavour physics: it is highly suppressed in the Standard Model, with a predicted branching ratio of 3 × 10^−11 and a theoretical uncertainty of just 2\%, and is therefore extremely sensitive to new physics. The KOTO experiment at J-PARC is searching for this decay. Using the data taken in 2021, it has set the most stringent upper limit to date of 2.2 × 10^−9 on the branching ratio at 90\% C.L. We present KOTO II, a next-generation experiment at J-PARC proposed in 2024, which aims to measure the K_L → π^0νν̅ branching ratio with a sensitivity below 10^−12 in the 2030s.
ER  -