R. P. Litchfield

activity

20052026

most citedIndication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam

1.4k citations · 8.9k across the 115 of their papers we have counts for

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hep-ex2026

First observation of electron antineutrinos from nuclear reactors at Super-Kamiokande

K. Abe, Y. Asaoka, M. Harada +244

In 2020, Super-Kamiokande entered the SK-Gd phase, improving its sensitivity to low-energy electron antineutrinos through the detection of neutrons captured on gadolinium dissolved…

hep-ex2026

First measurement of the low-momentum negative-muon beam for the muon-to-electron conversion experiment at J-PARC

The COMET Collaboration, K. Oishi, R. Abramishvili +183

The COMET Phase- $α$ experiment, the initial beam-operation stage of the COMET muon-to-electron conversion programme at J-PARC, took place in 2023 and marked the first beam operatio…

hep-ex2026

Search for the $^{16} O (ppp) \to^{13} C π^{+} π^{+} e^{+}$ Decay Mode in Super-Kamiokande Using Machine Learning Techniques

Kamiokande Collaboration, J. Feng, K. Abe +296

We report a new partial lifetime limit of $4.2 \times 1 0^{32}$ years for the trinucleon decay mode $^{16} O (ppp) \to^{13} C π^{+} π^{+} e^{+}$ , obtained from a searc…

hep-ex2026

Search for proton decay into a single charged antilepton and a massless invisible particle using the full pure water data set of Super-Kamiokande

Kamiokande Collaboration, Y. M. Liu, K. Terada +244

A search for proton decay via $p \to l^{+} + X$ , where $l^{+}$ is a positively charged lepton and $X$ is an invisible, massless, neutral particle, was performed using a 401~kt…

hep-ex2026

First double-differential measurement of pionless charged-current muon neutrino interactions using kinematic imbalance observables on carbon and oxygen with the T2K experiment

K. Abe, S. Abe, H. Adhikary +402

We report the first measurement of muon-neutrino charged-current cross section as a function of kinematic imbalance (KI) observables on oxygen with no pions and at least one proton…

hep-ex2026

Signal selection and model-independent extraction of pionless charged-current muon neutrino cross section using double-differential kinematic imbalance observables on carbon and oxygen with the T2K experiment

K. Abe, S. Abe, H. Adhikary +402

We present the first joint measurement of muon neutrino CC $0 π N p$ interactions on carbon and oxygen targets, in two double-differential kinematic imbalance (KI) observable spaces, $…

hep-ex2026

Constraining Neutrino Interaction Uncertainties for Neutrino Oscillation Measurements at the T2K Experiment

K. Abe, S. Abe, H. Adhikary +438

In the context of neutrino oscillation measurements from the T2K experiment, the off-axis near detector ND280 plays a crucial role in constraining the incoming neutrino flux and ne…

hep-ex2026

TeV-scale neutrino cross-section measurement using upward through-going muons in Super-Kamiokande

N. Bhuiyan, K. Abe, Y. Asaoka +248

Neutrinos provide a unique probe of both particle physics and the high-energy universe, traversing astronomical distances with minimal interaction. Their charged-current scattering…

hep-ex2026

Search for proton decay via $p \to e^{+} π^{0} π^{0}$ and $p \to μ^{+} π^{0} π^{0}$ in 0.401 megaton-years exposure of Super-Kamiokande I-V

Kamiokande Collaboration, K. Abe, S. Abe +310

We searched for proton decay via $p \to e^{+} π^{0} π^{0}$ and $p \to μ^{+} π^{0} π^{0}$ in 0.401 megaton-years of data collected in all pure water detector phases of Super-Kamiokande…

hep-ex2025★ 23 cited

Joint neutrino oscillation analysis from the T2K and NOvA experiments

NOvA, T2K Collaborations, : +597

The landmark discovery that neutrinos have mass and can change type (or "flavor") as they propagate -- a process called neutrino oscillation -- has opened up a rich array of theore…

hep-ex2025

Search for nucleon decay via $p \to ν π^{+}$ and $n \to ν π^{0}$ in 0.484 Mton-year of Super-Kamiokande data

Kamiokande Collaboration, S. Jung, K. Abe +243

We present the results of searches for nucleon decays via $p \to ν π^{+}$ and $n \to ν π^{0}$ using a 0.484 Mt $\cdot$ yr exposure of Super-Kamiokande I-V data covering the…

hep-ex2025

Measurement of muon neutrino induced charged current interactions without charged pions in the final state using a new T2K off-axis near detector WAGASCI-BabyMIND

K. Abe, S. Abe, R. Akutsu +398

We report a flux-integrated cross section measurement of muon neutrino interactions on water and hydrocarbon via charged current reactions without charged pions in the final state…

hep-ex2025

Testing T2K's Bayesian constraints with priors in alternate parameterisations

The T2K Collaboration, K. Abe, S. Abe +400

Bayesian analysis results require a choice of prior distribution. In long-baseline neutrino oscillation physics, the usual parameterisation of the mixing matrix induces a prior tha…

hep-ex2025★ 1 cited

Results from the T2K experiment on neutrino mixing including a new far detector $μ$ -like sample

The T2K Collaboration, K. Abe, S. Abe +404

We have made improved measurements of three-flavor neutrino mixing with 19.7(16.3) $\times 1 0^{20}$ protons on target in (anti-)neutrino-enhanced beam modes. A new sample of muon-ne…

hep-ex2025

First measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasi-elastic-like interactions using an accelerator neutrino beam

T2K Collaboration, K. Abe, S. Abe +334

We report the first measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasi-elastic-like interactions at the gadolinium-loaded Super-Kamiokande detecto…

hep-ex2025

First Measurement of the Electron Neutrino Charged-Current Pion Production Cross Section on Carbon with the T2K Near Detector

K. Abe, S. Abe, R. Akutsu +392

The T2K Collaboration presents the first measurement of electron neutrino-induced charged-current pion production on carbon in a restricted kinematical phase space. This is perform…

hep-ex2025

First differential measurement of the single $π^{+}$ production cross section in neutrino neutral-current scattering

K. Abe, S. Abe, R. Akutsu +378

Since its first observation in the 1970s, neutrino-induced neutral-current single positive pion production (NC1 $π^{+}$ ) has remained an elusive and poorly understood interaction chan…

hep-ex2025★ 2 cited

Signal selection and model-independent extraction of the neutrino neutral-current single $π^{+}$ cross section with the T2K experiment

K. Abe, S. Abe, R. Akutsu +378

This article presents a study of single $π^{+}$ production in neutrino neutral-current interactions (NC1 $π^{+}$ ) using the FGD1 hydrocarbon target of the ND280 detector of the T2K expe…

hep-ex2024

Latest activities and results from T2K

R. P. Litchfield, for the T2K Collaboration

The T2K neutrino oscillation experiment has gone through a period of renewal over the last couple of years, with several upgrades designed to improve sensitivity to leptonic CP vio…

hep-ex2024

First joint oscillation analysis of Super-Kamiokande atmospheric and T2K accelerator neutrino data

Super-Kamiokande, T2K collaborations, : +545

The Super-Kamiokande and T2K collaborations present a joint measurement of neutrino oscillation parameters from their atmospheric and beam neutrino data. It uses a common interacti…

hep-ex2023★ 46 cited

Solar neutrino measurements using the full data period of Super-Kamiokande-IV

Kamiokande Collaboration, K. Abe, C. Bronner +322

An analysis of solar neutrino data from the fourth phase of Super-Kamiokande~(SK-IV) from October 2008 to May 2018 is performed and the results are presented. The observation time…

hep-ex2023★ 6 cited

Measurements of the $ν_{μ}$ and $ν ˉ_{μ}$ -induced Coherent Charged Pion Production Cross Sections on $^{12} C$ by the T2K experiment

K. Abe, N. Akhlaq, R. Akutsu +380

We report an updated measurement of the $ν_{μ}$ -induced, and the first measurement of the $ν ˉ_{μ}$ -induced coherent charged pion production cross section on $^{12} C$ nuclei in the T…

hep-ex2023

Updated T2K measurements of muon neutrino and antineutrino disappearance using 3.6 $\times$ 10 $^{21}$ protons on target

K. Abe, N. Akhlaq, R. Akutsu +406

Muon neutrino and antineutrino disappearance probabilities are identical in the standard three-flavor neutrino oscillation framework, but CPT violation and non-standard interaction…

hep-ex2023★ 17 cited

First measurement of muon neutrino charged-current interactions on hydrocarbon without pions in the final state using multiple detectors with correlated energy spectra at T2K

K. Abe, N. Akhlaq, R. Akutsu +401

This paper reports the first measurement of muon neutrino charged-current interactions without pions in the final state using multiple detectors with correlated energy spectra at T…

First observation of electron antineutrinos from nuclear reactors at Super-Kamiokande

First measurement of the low-momentum negative-muon beam for the muon-to-electron conversion experiment at J-PARC

Search for the 16O(ppp)→13Cπ+π+e+ Decay Mode in Super-Kamiokande Using Machine Learning Techniques

Search for proton decay into a single charged antilepton and a massless invisible particle using the full pure water data set of Super-Kamiokande

First double-differential measurement of pionless charged-current muon neutrino interactions using kinematic imbalance observables on carbon and oxygen with the T2K experiment

Signal selection and model-independent extraction of pionless charged-current muon neutrino cross section using double-differential kinematic imbalance observables on carbon and oxygen with the T2K experiment

Constraining Neutrino Interaction Uncertainties for Neutrino Oscillation Measurements at the T2K Experiment

TeV-scale neutrino cross-section measurement using upward through-going muons in Super-Kamiokande

Search for proton decay via p→e+π0π0 and p→μ+π0π0 in 0.401 megaton-years exposure of Super-Kamiokande I-V

Joint neutrino oscillation analysis from the T2K and NOvA experiments

Search for nucleon decay via p→νπ+ and n→νπ0 in 0.484 Mton-year of Super-Kamiokande data

Measurement of muon neutrino induced charged current interactions without charged pions in the final state using a new T2K off-axis near detector WAGASCI-BabyMIND

Testing T2K's Bayesian constraints with priors in alternate parameterisations

Results from the T2K experiment on neutrino mixing including a new far detector μ-like sample

First measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasi-elastic-like interactions using an accelerator neutrino beam

First Measurement of the Electron Neutrino Charged-Current Pion Production Cross Section on Carbon with the T2K Near Detector

First differential measurement of the single π+ production cross section in neutrino neutral-current scattering

Signal selection and model-independent extraction of the neutrino neutral-current single π+ cross section with the T2K experiment

Latest activities and results from T2K

First joint oscillation analysis of Super-Kamiokande atmospheric and T2K accelerator neutrino data

Solar neutrino measurements using the full data period of Super-Kamiokande-IV

Measurements of the νμ​ and νˉμ​-induced Coherent Charged Pion Production Cross Sections on 12C by the T2K experiment

Updated T2K measurements of muon neutrino and antineutrino disappearance using 3.6 × 1021 protons on target

First measurement of muon neutrino charged-current interactions on hydrocarbon without pions in the final state using multiple detectors with correlated energy spectra at T2K

Search for the $^{16} O (ppp) \to^{13} C π^{+} π^{+} e^{+}$ Decay Mode in Super-Kamiokande Using Machine Learning Techniques

Search for proton decay via $p \to e^{+} π^{0} π^{0}$ and $p \to μ^{+} π^{0} π^{0}$ in 0.401 megaton-years exposure of Super-Kamiokande I-V

Search for nucleon decay via $p \to ν π^{+}$ and $n \to ν π^{0}$ in 0.484 Mton-year of Super-Kamiokande data

Results from the T2K experiment on neutrino mixing including a new far detector $μ$ -like sample

First differential measurement of the single $π^{+}$ production cross section in neutrino neutral-current scattering

Signal selection and model-independent extraction of the neutrino neutral-current single $π^{+}$ cross section with the T2K experiment

Measurements of the $ν_{μ}$ and $ν ˉ_{μ}$ -induced Coherent Charged Pion Production Cross Sections on $^{12} C$ by the T2K experiment

Updated T2K measurements of muon neutrino and antineutrino disappearance using 3.6 $\times$ 10 $^{21}$ protons on target