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

Feb 22nd, 2022

Topics

Dr. Minxi He at KEK Theory Center got the Outstanding Presentation Award

Feb 14th, 2022

Topics

NCBJ in Poland, KEK and UTokyo Sign MoU to Promote Hyper-Kamiokande Project

Aug 11th, 2021

Topics

A new logo for the Institute of Particle and Nuclear Studies.

Jun 4th, 2021

Topics

【J-PARC Topics】Dr. Chris J. Densham, innovator of neutrino production targets, wins the Institute of Physics Prize for Outstanding Professional Contributions

Jun 2nd, 2021

Topics

【HK Information】Groundbreaking ceremony for Hyper-Kamiokande held in Hida, Japan Due to start operation in 2027

Feb 26th, 2021

Topics

【J-PARC Information】The Announcement of the Next Director of J-PARC Center

May 25th, 2020

Topics

UTokyo and KEK sign MoU to promote Hyper-Kamiokande project

Apr 7th, 2020

Topics

【WEB RELEASE】Belle II explores new “portal” into dark matter – First results from the Belle II Experiment

Apr 6th, 2020

Topics

KEK-TRIUMF Exchange Program for Early Career Researchers successfully concluded

Mar 8th, 2020

Topics

About handling KEK users for novel coronavirus　- Message for KEK non-Japanese users –

Topics

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

Nov 6th, 2020

Press Release

Why Does Titanium Alloy Beam Window Become Brittle After Proton Beam Exposure? ~ Research and Development on the Accelerator Target and Beam Window Materials by RaDIATE International Collaboration ~

Jun 26th, 2020

Press Release

SuperKEKB collider achieves the world’s highest luminosity

Apr 16th, 2020

Press Release

T2K Results Restrict Possible Values of Neutrino CP Phase – Published in Nature, the results are a major step forward in the study of difference between matter and antimatter –

Feb 4th, 2020

Press Release

Researchers find way to show how the tiniest particles in our Universe saved us from complete annihilation

Mar 25th, 2019

Press Release

Kick-off of the Belle II Phase 3 Physics Run

Mar 25th, 2019

Press Release

SuperKEKB Phase 3 (Belle II Physics Run) Starts

Mar 4th, 2019

Press Release

KOTO Experiment at J-PARC Hadron Experimental Facility Broke World’s Best Sensitivity on Rare Neutral Kaon Decay by an Order of Magnitude – first step forward elucidation of “matter-antimatter asymmetry” –

Press Release

Event

Dr. Minxi He at KEK Theory Center got the Outstanding Presentation Award

NCBJ in Poland, KEK and UTokyo Sign MoU to Promote Hyper-Kamiokande Project

A new logo for the Institute of Particle and Nuclear Studies.

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

【J-PARC Topics】Dr. Chris J. Densham, innovator of neutrino production targets, wins the Institute of Physics Prize for Outstanding Professional Contributions

Research from the microscopic world to the universe multilaterally.

ABOUT

RESEARCH

EDUCATION

NEWS

Dr. Minxi He at KEK Theory Center got the Outstanding Presentation Award

NCBJ in Poland, KEK and UTokyo Sign MoU to Promote Hyper-Kamiokande Project

A new logo for the Institute of Particle and Nuclear Studies.

【J-PARC Topics】Dr. Chris J. Densham, innovator of neutrino production targets, wins the Institute of Physics Prize for Outstanding Professional Contributions

【HK Information】Groundbreaking ceremony for Hyper-Kamiokande held in Hida, Japan Due to start operation in 2027

【J-PARC Information】The Announcement of the Next Director of J-PARC Center

UTokyo and KEK sign MoU to promote Hyper-Kamiokande project

【WEB RELEASE】Belle II explores new “portal” into dark matter – First results from the Belle II Experiment

KEK-TRIUMF Exchange Program for Early Career Researchers successfully concluded

About handling KEK users for novel coronavirus　- Message for KEK non-Japanese users –

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

Why Does Titanium Alloy Beam Window Become Brittle After Proton Beam Exposure? ~ Research and Development on the Accelerator Target and Beam Window Materials by RaDIATE International Collaboration ~

SuperKEKB collider achieves the world’s highest luminosity

T2K Results Restrict Possible Values of Neutrino CP Phase – Published in Nature, the results are a major step forward in the study of difference between matter and antimatter –

Researchers find way to show how the tiniest particles in our Universe saved us from complete annihilation

Kick-off of the Belle II Phase 3 Physics Run

SuperKEKB Phase 3 (Belle II Physics Run) Starts

KOTO Experiment at J-PARC Hadron Experimental Facility Broke World’s Best Sensitivity on Rare Neutral Kaon Decay by an Order of Magnitude – first step forward elucidation of “matter-antimatter asymmetry” –

GALLERY

SEMINAR

DONATION

Dr. Minxi He at KEK Theory Center got the Outstanding Presentation Award

NCBJ in Poland, KEK and UTokyo Sign MoU to Promote Hyper-Kamiokande Project

A new logo for the Institute of Particle and Nuclear Studies.

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

【J-PARC Topics】Dr. Chris J. Densham, innovator of neutrino production targets, wins the Institute of Physics Prize for Outstanding Professional Contributions

Research from the microscopic world to the universe multilaterally.

ABOUT

RESEARCH

EDUCATION

NEWS

Dr. Minxi He at KEK Theory Center got the Outstanding Presentation Award

NCBJ in Poland, KEK and UTokyo Sign MoU to Promote Hyper-Kamiokande Project

A new logo for the Institute of Particle and Nuclear Studies.

【J-PARC Topics】Dr. Chris J. Densham, innovator of neutrino production targets, wins the Institute of Physics Prize for Outstanding Professional Contributions

【HK Information】Groundbreaking ceremony for Hyper-Kamiokande held in Hida, Japan Due to start operation in 2027

【J-PARC Information】The Announcement of the Next Director of J-PARC Center

UTokyo and KEK sign MoU to promote Hyper-Kamiokande project

【WEB RELEASE】Belle II explores new “portal” into dark matter – First results from the Belle II Experiment

KEK-TRIUMF Exchange Program for Early Career Researchers successfully concluded

About handling KEK users for novel coronavirus - Message for KEK non-Japanese users –

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

Why Does Titanium Alloy Beam Window Become Brittle After Proton Beam Exposure? ~ Research and Development on the Accelerator Target and Beam Window Materials by RaDIATE International Collaboration ~

SuperKEKB collider achieves the world’s highest luminosity

T2K Results Restrict Possible Values of Neutrino CP Phase – Published in Nature, the results are a major step forward in the study of difference between matter and antimatter –

Researchers find way to show how the tiniest particles in our Universe saved us from complete annihilation

Kick-off of the Belle II Phase 3 Physics Run

SuperKEKB Phase 3 (Belle II Physics Run) Starts

KOTO Experiment at J-PARC Hadron Experimental Facility Broke World’s Best Sensitivity on Rare Neutral Kaon Decay by an Order of Magnitude – first step forward elucidation of “matter-antimatter asymmetry” –

GALLERY

SEMINAR

DONATION

About handling KEK users for novel coronavirus　- Message for KEK non-Japanese users –