Weakly Interacting Massive Particle (WIMP) is an attractive candidate for particle dark matter. Typical WIMP models predict the scattering process of dark matter off nuclei, and they can be probed by direct detection experiments such as the XENONnT. There are many direct detection experiments for more than a few decades, and there is no significant scattering signal. This implies that the...
The XENONnT is a direct dark matter search experiment using a time projection chamber with 8.5 tons of liquid xenon. The experiment has been conducted at located at Laboratori Nazionali del Gran Sasso (LNGS), Italy, and taking the science data since 2021. In this talk, a summary of recent status/results of the XENONnT experiment, and its future project, the XLZD experiment, will be presented.
The NIT (Nano Imaging Tracker), developed and studied at Nagoya University since 2010, is a promising tool for searching for dark matter signals, which are expected to be observable only with several tens keV of recoiled atoms by it.
We have set up a manufacturing plant of NIT at the National Laboratory of Gran Sasso in Italy and have conducted joint research as a NEWSdm experiment. In...
Since weakly interacting massive particles (WIMPs) are predicted to exist at the electroweak scale, various experiments—including collider searches, satellite observations, and underground detectors—aim to explore the mass range from GeV to TeV in a complementary approach.
In particular, TeV-scale WIMPs can be effectively probed by Imaging Atmospheric Cherenkov Telescopes (IACTs), which...
Dark matter production in high energy accelerators comprises one of the three main pillars of the dark matter detection strategies together with the scattering and the annihilation.
This talk overviews the latest searches in the collider experiments and provides personal vision on what to do next.
The Milky Way and its satellite galaxies provide invaluable laboratories for exploring the nature of dark matter.
Their structural and dynamical properties offer unique opportunities to place constraints on dark matter spatial and velocity distributions on small scales.
These systems are also prime targets for direct and indirect dark matter searches.
Unveiling their dark matter...
The talk reviews some of the latest results and prospects of energy-frontier physics at the LHC.
The Higgs sector is a unique part of the Standard Model in particle
physics. Even after the discovery of the Higgs boson in 2012 at the
Large Hadron Collider (LHC), the complete picture of the Higgs sector is
still uncovered. The ATLAS experiment is one of the two experiments that discovered the Higgs boson and can directly see it in proton-proton
collisions. It has measured the nature of...
The muon’s magnetic anomaly (g-2) and electric dipole moment (EDM) serve as powerful windows into physics beyond the Standard Model. Precise measurements of these fundamental properties can reveal potential contributions from undiscovered particles and interactions. In this talk, I will present the current status the Fermilab Muon g-2 experiment and provide an update on the PSI muEDM experiment.
The J-PARC muon g-2/EDM experiment aims to measure the muon magnetic moment anomaly (a_μ = (g-2)/2) and to search for the muon electric dipole moment, with sensitivity comparable to the highest in the world. This will be achieved using a small-emittance muon beam, created by cooling muons and accelerating them with a multi-stage linac. The experimental approach significantly differs from the...
The currently operating T2K long baseline neutrino experiment is probing the phenomenon of neutrino oscillations, providing world leading constraints on neutrino mixing parameters while searching for CP violation in neutrinos. The next generation experiment, Hyper-Kamiokande (Hyper-K), is currently under construction and will succeed T2K and Super-Kamiokande with a higher beam intensity and...
We are advancing the NINJA experiment at J-PARC using nuclear emulsion to study low-energy neutrinos in the Sub-Multi GeV range. Currently, we are conducting a physics run aimed at the precise measurement of neutrino-water interactions, which is crucial for reducing systematic uncertainties in long-baseline neutrino oscillation experiments that test CP symmetry violation in the lepton sector....
Tau neutrinos is one of least studied particles. Measurement of the interaction crossection with a nucleon were reported by DONuT experiment but larger statistical and systematic errors. SHiP experiment is a hybrid experimnt constructing and run in 2030s. The experiment have two main subjevts, one is hidden particle search in a large decay volume and the other is tau neutrino detector with...
Super-Kamiokande (SK) has been operational since 1996, revealing neutrino oscillations and precisely measuring oscillation parameters. With the extensive atmospheric neutrino data collected, we have recently been exploring the neutrino mass hierarchy. In 2020, gadolinium was added to the SK tank, and since then, we have been collecting data with neutron tagging information. One of the most...
Flavour physics represents one of the most fascinating puzzles of
particle physics. I will discuss some recent developments in this
field, both from a theoretical perspective and from a more
phenomenological point of view. I will focus in particular on the idea
of flavour non-universal gauge interactions as a way to address the
origin of the flavour hierarchies, while enabling new physics...
The Belle II experiment at the SuperKEKB collider is building on the achievements of its predecessor, Belle, to explore new frontiers in B physics. With its vastly increased dataset, Belle II enables detailed studies of rare B meson decays and CP violation, offering unique sensitivity to phenomena beyond the Standard Model. These efforts are complemented by results from the LHC, which provide...
Talk highlighting recent tau physics results and future prospects for the Belle II experiment.
The current status of ongoing and planned experiments using low energy (roughly eV and below) neutrons to search for beyond standard model (BSM) physics will be presented. These experiments take place at many different facilities and cover a wide range of physics, including measurements of the static electric dipole moment of the neutron, sensitive searches for time-reversal violation in...
The "neutron lifetime puzzle" arises from the discrepancy between neutron lifetime measurements obtained using the beam method, which measures decay products, and the bottle method, which measures the disappearance of neutrons. To resolve this puzzle, we conducted an experiment using a pulsed cold neutron beam at J-PARC.
In this experiment, the neutron lifetime is determined from the ratio...
Recent accelerator experiments have reported unexpected states known as exotic hadrons, whose properties cannot be explained by the conventional picture, mesons and baryons. In the heavy quark sector, $XYZ$, $T_{cc}$, $P_c$ etc. have been reported since the discovery of $X(3872)$. There have been many exotic hadrons located near the hadron threshold, and thus loosely hadron bound states called...
Ultra-high energy cosmic rays are the highest energy particles arriving at the Earth and measured using an extensive air shower induced by them. In 2025, the Pierre Auger Observatory reported an excess of the number of muons in an extensive air shower than that expected in simulations. This indicates a puzzle, a muon puzzle, suggesting the interactions in an extensive air shower are not...
I will present a brief overview of the current status of cosmology, and highlight what we can expect from the Euclid Dark Energy Mission which launched mid-2023.
The Subaru Prime Focus Spectrograph (PFS) cosmology program will deliver redshifts for four million [OII] emission-line galaxies over 1200 deg² across 𝑧 = 0.6 to 𝑧 = 2.4, based on approximately 100 nights of observations. The program has two primary goals: (1) to rule out the inverted neutrino mass hierarchy by measuring Σ𝑚𝜈 < 0.1 eV at 95% CL, or to determine the total neutrino mass if Σ𝑚𝜈 >...
The stochastic gravitational wave background (SGWB) provides a unique window into the early universe, offering insights into high-energy physics beyond the reach of conventional cosmological observations. Unlike the cosmic microwave background, which probes the universe after recombination, gravitational waves can propagate freely from the earliest moments after the Big Bang, carrying imprints...
Cold dark matter (CDM) is microscopically modelled as a self-gravitating collisionless fluid obeying the Vlasov-Poisson equations. The cold nature suggests that the CDM phase-space structure is described as a three-dimensional super-sheet evolving in six-dimensional phase space. At the initial stage, the phase-space sheet represents a single-stream flow, but as a consequence of the non-linear...
Holography suggests that gravitational theory can be described by a quantum field theory in one lower dimension. This idea provides an invaluable framework to explore the nature of quantum gravity. In this talk, I will review the basic concepts of holography and highlight recent progress in understanding quantum gravity on anti-de Sitter spacetimes, including the roles of quantum entanglement...
The use of machine learning (ML) in high energy physics has exploded in the past decade. While it has provide impressive improvements across a broad range of use cases, it has typically been limited to uses with data already collected by experiments. I will discuss the challenges involved with the use of ML on FPGAs in trigger and data acquisition systems in general as well as specific...
Machine learning and physics have long been deeply intertwined, and there have been eras when their relationship came to the forefront. Even in today’s revolutionary AI development, physics has played a significant role—for example, in diffusion models. From a physics standpoint as well, an integrative perspective across various specialized domains is provided by innovative new mathematical...
Gamma-ray astronomy plays a fundamental role in the understanding of very high energy tricky and outstanding sources in our own Galaxy and their role in particle acceleration.
In this context, despite the enormous efforts done in very recent years, both theoretically and experimentally, Cosmic Ray (CR) origin remain without clear answers. Two are the hints of CR acceleration that are sought...
The observation of cosmic gamma rays is crucial for understanding high-energy astrophysical phenomena and the mechanism of cosmic-ray acceleration. We have been running the GRAINE project, a cosmic gamma-ray observation project in an energy range of 10MeV – 100GeV, using balloon-borne telescope equipped with nuclear emulsion, characterized with a high-angular resolution and polarization...
The XRISM satellite, launched in 2023, provides an X-ray spectroscopy with > 1000 resolving power around 6 keV Fe-K lines. The mission is providing numerous new insights with the high resolution spectra. On 2027, the MeV all-sky mission COSI will be launched. The mission will provide >~ 100 resolving power at 511-2 MeV. We will give the latest review of the early science results and project...
The 21 cm line emitted by neutral hydrogen (HI) atoms is a valuable observable for investigating the high redshift universe. In particular, before cosmic reionization, the universe was filled with neutral hydrogen gas. Due to cosmic expansion, the redshifted 21 cm line before the reionization is observed at frequencies below 200 MHz. Therefore, low-frequency radio observations can map HI...
The LIGO-Virgo-KAGRA collaboration is currently in its fourth observing run, having detected approximately 200 gravitational wave (GW) events. This presentation will provide an overview of GW observations since the first detection in 2015, discuss future prospects, and highlight our research on GW detector science at Nagoya University.
