Institute of Particle and Nuclear Studies

Research from the microscopic world to the universe multilaterally.

Everything is divided into molecules, atoms, nuclei, and elementary particles.
Elementary particles are the smallest matter in the universe.
Understanding the nature of microscopic things such as elementary particles and nuclei is the important key to unravel how the universe was born.
We are High Energy Accelerator Research Organization Institute of Particle and Nuclear Studies (KEK IPNS).
We carry out comprehensive studies on particles, nuclei, and the universe using both theoretical and experimental approaches.

ABOUT

Institute of Particle and Nuclear Studies (IPNS), KEK is a national institute of particle and nuclear physics in Japan.

RESEARCH

IPNS works on cutting-edge research of particle physics, nuclear physics, and cosmology from both experimental and theoretical approaches.

EDUCATION

KEK contributes to training researchers and technical experts in various fields related to accelerator science. KEK supports students who are full of curiosity.

NEWS

Topics
Press Release
Event

Nov 1st, 2024

Topics

The Report on Belle II Physics Week 2024

Oct 21st, 2024

Topics

[Welcome to the IPNS] Interview with Dr. Mukai Momo of Wako Nuclear Science Center

Oct 11th, 2024

Topics

Forefront of muon g-2 theory – A Report from the 7th Muon g-2 Theory Initiative Workshop

Oct 5th, 2024

Topics

[Welcome to the IPNS] Interview with Dr. LAU Tak Shun of the Belle Group

Jul 31st, 2024

Topics

Report on International Workshop MNT2024

Jul 10th, 2024

Topics

Three IPNS Members Receive Outstanding Achievement Award for HL-LHC Upgrade

Jun 18th, 2024

Topics

[Welcome to the IPNS] Interview with Mr. Tatsunori Itaba of the Hadron Group

Jun 18th, 2024

Topics

[Welcome to the IPNS] Interview with Ms. Chihiro Yoshida of the ITDC-Mechanical Engineering Group

May 30th, 2024

Topics

[Welcome to the IPNS] Interview with Dr. Yuji Enari of the Instrumentation Technology Development Center

May 20th, 2024

Topics

[Welcome to the IPNS] Interview with Dr. Takumi Yamaga of the Hadron Group

Topics

Oct 2nd, 2024

Press Release

Production of a braille book “Origins of the Universe and Matter: Understanding the Invisible World”

Aug 5th, 2024

Press Release

First Measurement of Electron- and Muon-Neutrino Interaction Rates at the Highest Energy Ever Detected from an Artificial Source

Jun 19th, 2024

Press Release

Unraveling Primordial Gravitational Waves -A Swift Formalism to See the Dawn of the Universe

May 23rd, 2024

Press Release

World’s first cooling and acceleration of muon – The first muon accelerator finally coming to a reality. –

Jan 18th, 2024

Press Release

T2K experiment enters a new phase with significantly improved sensitivity for its world leading neutrino oscillation research

Jan 26th, 2023

Press Release

Pole position of Λ(1405) measured in d(K^-,n)πΣ reactions

Jun 9th, 2022

Press Release

Graphite Disk Keeps Rotating to Produce Muons　- The Challenge under International Collaboration between Japan and Switzerland –

Jul 26th, 2021

Press Release

Internal structure of the Xi nucleus finally observed New insights into the formation of nuclei and the structure of neutron stars

Mar 2nd, 2021

Press Release

The first determination of the Xi hypernuclear mass – New insights toward understanding of the origin of nuclei and structure of neutron stars –

Nov 24th, 2020

Press Release

A hint of new physics in polarized radiation from the early Universe

Press Release

Jul 29th, 2024

Event

[for researchers] The 7th Plenary Workshop of the Muon g-2 Theory Initiative

Oct 18th, 2023

Event

[IPNS Workshop] Muon acceleration and future colliders with muon

Oct 16th, 2023

Event

[IPNS Workshop] DE & I (diversity, equity and inclusion) at KEK

Jan 26th, 2023

Event

Accomplishments and mysteries in quark flavor physics ~ 50th Anniversary of Kobayashi-Maskawa Theory

Event

The Report on Belle II Physics Week 2024

[Welcome to the IPNS] Interview with Dr. Mukai Momo of Wako Nuclear Science Center

Forefront of muon g-2 theory – A Report from the 7th Muon g-2 Theory Initiative Workshop

[Welcome to the IPNS] Interview with Dr. LAU Tak Shun of the Belle Group

Production of a braille book “Origins of the Universe and Matter: Understanding the Invisible World”

Research from the microscopic world to the universe multilaterally.

ABOUT

RESEARCH

EDUCATION

NEWS

The Report on Belle II Physics Week 2024

[Welcome to the IPNS] Interview with Dr. Mukai Momo of Wako Nuclear Science Center

Forefront of muon g-2 theory – A Report from the 7th Muon g-2 Theory Initiative Workshop

[Welcome to the IPNS] Interview with Dr. LAU Tak Shun of the Belle Group

Report on International Workshop MNT2024

Three IPNS Members Receive Outstanding Achievement Award for HL-LHC Upgrade

[Welcome to the IPNS] Interview with Mr. Tatsunori Itaba of the Hadron Group

[Welcome to the IPNS] Interview with Ms. Chihiro Yoshida of the ITDC-Mechanical Engineering Group

[Welcome to the IPNS] Interview with Dr. Yuji Enari of the Instrumentation Technology Development Center

[Welcome to the IPNS] Interview with Dr. Takumi Yamaga of the Hadron Group

Production of a braille book “Origins of the Universe and Matter: Understanding the Invisible World”

First Measurement of Electron- and Muon-Neutrino Interaction Rates at the Highest Energy Ever Detected from an Artificial Source

Unraveling Primordial Gravitational Waves -A Swift Formalism to See the Dawn of the Universe

World’s first cooling and acceleration of muon – The first muon accelerator finally coming to a reality. –

T2K experiment enters a new phase with significantly improved sensitivity for its world leading neutrino oscillation research

Pole position of Λ(1405) measured in d(K^-,n)πΣ reactions

Graphite Disk Keeps Rotating to Produce Muons　- The Challenge under International Collaboration between Japan and Switzerland –

Internal structure of the Xi nucleus finally observed New insights into the formation of nuclei and the structure of neutron stars

The first determination of the Xi hypernuclear mass – New insights toward understanding of the origin of nuclei and structure of neutron stars –

A hint of new physics in polarized radiation from the early Universe

[for researchers] The 7th Plenary Workshop of the Muon g-2 Theory Initiative

[IPNS Workshop] Muon acceleration and future colliders with muon

[IPNS Workshop] DE & I (diversity, equity and inclusion) at KEK

Accomplishments and mysteries in quark flavor physics ~ 50th Anniversary of Kobayashi-Maskawa Theory

Portal pages

SEMINAR

JOB OPPORTUNITIES

The Report on Belle II Physics Week 2024

[Welcome to the IPNS] Interview with Dr. Mukai Momo of Wako Nuclear Science Center

Forefront of muon g-2 theory – A Report from the 7th Muon g-2 Theory Initiative Workshop

[Welcome to the IPNS] Interview with Dr. LAU Tak Shun of the Belle Group

Production of a braille book “Origins of the Universe and Matter: Understanding the Invisible World”

Research from the microscopic world to the universe multilaterally.

ABOUT

RESEARCH

EDUCATION

NEWS

The Report on Belle II Physics Week 2024

[Welcome to the IPNS] Interview with Dr. Mukai Momo of Wako Nuclear Science Center

Forefront of muon g-2 theory – A Report from the 7th Muon g-2 Theory Initiative Workshop

[Welcome to the IPNS] Interview with Dr. LAU Tak Shun of the Belle Group

Report on International Workshop MNT2024

Three IPNS Members Receive Outstanding Achievement Award for HL-LHC Upgrade

[Welcome to the IPNS] Interview with Mr. Tatsunori Itaba of the Hadron Group

[Welcome to the IPNS] Interview with Ms. Chihiro Yoshida of the ITDC-Mechanical Engineering Group

[Welcome to the IPNS] Interview with Dr. Yuji Enari of the Instrumentation Technology Development Center

[Welcome to the IPNS] Interview with Dr. Takumi Yamaga of the Hadron Group

Production of a braille book “Origins of the Universe and Matter: Understanding the Invisible World”

First Measurement of Electron- and Muon-Neutrino Interaction Rates at the Highest Energy Ever Detected from an Artificial Source

Unraveling Primordial Gravitational Waves -A Swift Formalism to See the Dawn of the Universe

World’s first cooling and acceleration of muon – The first muon accelerator finally coming to a reality. –

T2K experiment enters a new phase with significantly improved sensitivity for its world leading neutrino oscillation research

Pole position of Λ(1405) measured in d(K^-,n)πΣ reactions

Graphite Disk Keeps Rotating to Produce Muons - The Challenge under International Collaboration between Japan and Switzerland –

Internal structure of the Xi nucleus finally observed New insights into the formation of nuclei and the structure of neutron stars

The first determination of the Xi hypernuclear mass – New insights toward understanding of the origin of nuclei and structure of neutron stars –

A hint of new physics in polarized radiation from the early Universe

[for researchers] The 7th Plenary Workshop of the Muon g-2 Theory Initiative

[IPNS Workshop] Muon acceleration and future colliders with muon

[IPNS Workshop] DE & I (diversity, equity and inclusion) at KEK

Accomplishments and mysteries in quark flavor physics ~ 50th Anniversary of Kobayashi-Maskawa Theory

Portal pages

SEMINAR

JOB OPPORTUNITIES

Graphite Disk Keeps Rotating to Produce Muons　- The Challenge under International Collaboration between Japan and Switzerland –