La physique des particules explore les briques élémentaires de la matière et leurs interactions, qui déterminent la structure et les propriétés de la matière dans l'univers. Le portail web rend ces recherches fascinantes compréhensibles pour un public intéressé.en plus

Image : ESO, R. Fosburyen plus
Collision proton-proton (LHC, CERN)

La physique moderne repose sur un élégant « Modèle Standard de la physique des particules », une théorie quantique des champs basée sur trois symétries et une brisure de symétrie. Cette théorie décrit et explique magnifiquement tous les résultats expérimentaux obtenus jusqu'à présent. Avec la découverte de la particule de Higgs en 2012 au "Large Hadron Collider" du CERN, la dernière pièce manquante du Modèle Standard a été confirmée expérimentalement. Les expériences au CERN et dans d'autres laboratoires internationaux continuent maintenant à sonder la validité et les limites du Modèle Standard dans des domaines toujours plus vaste. Cependant, pour une compréhension globale des lois de la nature une théorie au-delà du Modèle Standard est nécessaire, qui devrait inclure la gravitation et expliquer la présence de la matière noire et de l'énergie sombre dans l'univers.

Événements, Annonces, Publications

The FASER detector at CERN, in a tunnel 80 metres below the Earth's surface. The detector is aligned in such a way that it detects those particles that are created in proton-proton collisions in the ATLAS experiment and fly straight on from there without deflection.
FASER - the 'ForwArd Search ExpeRiment' at the CERN particle accelerator

When people talk about CERN, they inevitably think of the large-scale experiments at the Large Hadron Collider (LHC). But the European Laboratory for Particle Physics has even more to offer:

Image : Claire Antel / FASER
Comparison between RK measurements. The measurements by the BaBar and Belle collaborations combine B+→K+ℓ+ℓ− and B0→KS0ℓ+ℓ− decays, where ℓ is a lepton. The previous LHCb measurements and the new result [4], which supersedes them, are also shown.
Exciting news from CERN experiment with Swiss participation

Almost ten years ago, the European Laboratory for Particle Physics (CERN) made headlines with the discovery of the Higgs particle. These days, the LHCb experiment at CERN has published results

Image : LHCb, CERN
Martin Pohl: Particles, Fields, Space-Time. From Thomson’s Electron to Higgs’ Boson. CRC Press 2021.
Martin Pohl packs a century of particle physics between two book covers.

Until his retirement in 2017, Martin Pohl was a physics professor at the University of Geneva and worked on particle physics research projects for almost half a century. Drawing on

Image : Martin Pohl
Photon Science Roadmap for Research Infrastructures 2025–2028 by the Swiss Photon Community
Photon Science Roadmap

This community roadmap summarizes a survey of the Swiss large-scale infrastructure requirements in the broad field of photon science for the years 2025–2028, drawing from the current situation both in

Neutron Science Roadmap for Research Infrastructures 2025–2028 by the Swiss Neutron Science Community
Neutron Science Roadmap

This community roadmap presents a broad overview of the current status of neutron science in Switzerland and derives a set of recommendations for future developments. It is the result of

This device was used at the Paul Scherrer Institute to produce pionic helium atoms for research purposes
Particle physicists create artificial atoms for research purposes

In the laboratories of modern physics the elementary components of matter are studied. To do this, scientists sometimes build artificial atoms to help them understand the laws of matter. A

SGK_annualMeeting_2021
Annual Assembly 2021

This is some text copied from the meeting website put up by fribourg he 2021 annual meeting of the SGK/SSCr and general assembly will take place at the department of

Claudia Merlassino, CHIPP Prize 2020
Claudia Merlassino wins the CHIPP Prize 2020

Claudia Merlassino was born in Genoa, studied physics in Milan and completed her doctorate at the University of Bern in October 2019, since then she has been doing research at

Prof. Rainer Wallny (ETHZ)
CHIPP President Prof. Rainer Wallny on the updated "European Strategy for Particle Physics

On June 19th CERN Council adopted the update of the "European Strategy for Particle Physics 2020". This document updates an earlier strategy paper that was adopted by the Council in

Beamline for schools
Geneva school wins “Beamline for Schools” 2020 competition

The delta+ is a type of baryon, the family of sub-atomic particles to which the more well-known proton and neutron belong. A team of physics enthusiasts at the International School

Claudia Merlassino, CHIPP Prize 2020
Claudia Merlassino wins the CHIPP Prize 2020

Claudia Merlassino was born in Genoa, studied physics in Milan and completed her doctorate at the University of Bern in October 2019, since then she has been doing research at

PET image of brains without (top) and with (bottom) amyloid deposits. The deposits can be recognized by the red colouring, even with reduced spatial resolution (centre and right).
The start-up Positrigo uses findings from particle physics for the early diagnosis of Alzheimer's disease

Positron emission tomography (PET) helps medical doctors to detect cancer and many other diseases. A team of researchers led by ETH Professor Günther Dissertori is working on a new generation

CHART logo
Swiss research initiative CHART works on particle accelerators of the future

FCC - these three letters stand for the vision of a new ring accelerator that could be built at the European particle physics laboratory CERN in Geneva. With this long-term

Physicist Dr. Marina Battaglia is a senior researcher at the FHNW Institute for Data Science and works on the STIX project.
University of Applied Sciences Northwestern Switzerland researches astroparticles of the Sun

Scientists at the University of Applied Sciences and Arts Northwestern Switzerland (FHNW) have spent around ten years building the Spectrometer / Telescope for Imaging X-rays (STIX). Since 10 February, the

Artistic representation of a proton decay. Illustration: Hyper-Kamiokande Collaboration
Visiting the Japanese Super-Kamiokande detector (part 2)

In deep underground tunnels of former mines near the Japanese Alps, teams of scientists with Swiss participation are researching various types of elementary particles. Over the next few years, powerful

A 1.7 km long tunnel leads to the neutrino detector Super-Kamiokande. Photo: B. Vogel
Visiting the Japanese Super-Kamiokande detector (part 1)

Hardly any elementary particle occurs more frequently in the universe than the elusive neutrino. The investigation of the almost massless tiny particle is a focus of current elementary particle physics.

Fernerkundung, geophysikalische Prospektion und Ausgrabungen am Sirkeli Höyük
Fernerkundung, geophysikalische Prospektion und Ausgrabungen am Sirkeli Höyük (TR)

Graben oder nicht graben? Das ist oft die Frage! Die Entscheidung müssen Archäologen aber nicht dem Zufall überlassen. Geophysikalische Prospektionen und die Fernerkundung erlauben sehr weit gehende Einsichten in den

Matteo Fadel: Prix Schläfli 2019 Physik
Matteo Fadel – Des enchevêtrements paradoxaux

Un labyrinthe de miroirs, un pot brillant, d’innombrables câbles et écrans numériques. Si vous rendez visite à Matteo Fadel sur son lieu de travail à l’Université de Bâle, il vous

Pokale Prix Schläfli
La SCNAT récompense les quatre meilleures thèses de doctorat en sciences naturelles

Le contrôle de la quantité de phosphate dans les cellules, les processus impliqués dans les catalyseurs, l'utilisation des sols à Madagascar, ou encore un paradoxe de la physique quantique –

XENON1T installation in the underground hall of Laboratori Nazionali del Gran Sasso. The three storey building houses various auxiliary systems. The cryostat containing the LXeTPC is located inside the large water tank next to the building.
The XENON1T experiment in the Italian Gran Sasso Laboratory has measured the most protracted radioactive decay ever

Radioactive waste from nuclear power plants can take a long time to decay. For plutonium-239 the half-life - that is the time until half of the atoms of a sample

At the Physics Institute at the University of Bern, Armin Fehr and his colleagues have built the future 'Inner Tracker' of the ATLAS detector on a 1 to 1 scale. In the tube on the left, the proton-proton collisions take place. The dark red box shows one of the regions where the Optoboards will be located.
Every second fifty terabits of data

From 2026, the performance of the large-scale experiments at the European particle physics laboratory, CERN, in Geneva will be significantly increased. The preliminary work for the upgrade of the large

In November 2018, a jury included the Geneva-based company Securaxis in the funding program of the "Business Incubation Centre of CERN Technologies" in PARK INNOVAARE in Villigen (AG). Photo (from left to right): Glenn Meleder (CEO Securaxis), Benno Rechsteiner (CEO PARK INNOVAARE), and Aurélie Pezous (Knowledge Transfer Officer at CERN).
The Innovation Park “PARK INNOVAARE” in Villigen (AG) supports start-up companies in the field of accelerator technology.

CERN in Geneva is the leading particle physics laboratory worldwide. Large particle accelerators based on the most innovative technologies are used there for fundamental research. One year ago, the innovation

Jürg Pfister, Secrétaire général de la SCNAT
De quels grands équipements la recherche suisse a-t-elle besoin?

La Confédération a chargé les Académies suisses des sciences d'établir des feuilles de route pour les infrastructures de recherche dans les différents domaines scientifiques. Ces feuilles de route servent à

Anna Soter and her experiment at PSI. Photo: private
Anna Soter Wants to use Exotic Atoms for a Subtle Experiment

Gravity accompanies us in our everyday lives—from early morning, when we get out of bed, to late evening, when we drop tiredly onto the mattress. Although no other force of

Logo of the IYPT 2019 - International Year of Periodic Table of the Chemical Elements
IYPT 2019 - Année internationale du tableau périodique des éléments chimiques

Le tableau périodique des éléments chimiques est l'une des réalisations les plus importantes de la science, qui rend compte non seulement de l'essence de la chimie, mais aussi de la

L'observatoire du Sphinx, Station de recherche de haute montagne du Jungfraujoch
Top of Europe: les honneurs pour un site de recherche d'exception perché à 3450 mètres d'altitude

À une époque où beaucoup de pays d'Europe se refermaient sur eux-mêmes, la Suisse ouvrait une station de recherche à vocation internationale au Jungfraujoch. Plusieurs prix Nobel y ont travaillé.

Vue aérienne de la vallée de Frick dans le canton d'Argovie
La SCNAT crée le plus grand réseau de connaissances sur le paysage

Etalement urbain, déclin de la diversité des paysages et de la biodiversité, paysages de montagne marqués par le changement climatique: afin de mieux protéger les paysages suisses avec l’implication de

Günther Dissertori is Professor for Particle Physics at the Swiss Federal Institute of Technology in Zurich.
The FCC provides science for almost a century

In spring 2020 the European particle physics community will decide on a new European Strategy highlighting the strategic long-term goals in this important field of fundamental research. In December 2018

APPEC Contribution to the European Particle Physics Strategy
APPEC Contribution to the European Particle Physics Strategy

APPEC strongly supports and encourages the prospects of an even stronger synergy between Astroparticle Physics and Cosmology with Particle Physics. Areas of synergy between the above domains are identified: dark

Dr. James Sinclair observes on four computer screens at the University of Bern, whether the 7000 km away MicroBooNE experiment on Fermilab runs smoothly.
James Sinclair designs a novel neutrino detector at the University of Bern

Neutrinos are electrically neutral and very light elementary particles, which interact only weakly with other matter and are therefore difficult to observe. From 2025, a new neutrino experiment in the

Laetitia Laub with a voluminous introduction to quantum field theory. "This is the bible ot the beginners," says Laub with an ironic undertone. Photo: B. Vogel
Further reducing the error

Laetitia Laub was born and raised near Lausanne. She studied mathematics and physics at the Federal Institute of Technology in Lausanne (EPFL). Since August 2017, the 24-year-old junior scientist is

Prix Nobel de Physique 2018
Le Prix Nobel de Physique 2018 attribué à la physique des lasers

Le Prix Nobel de physique 2018 est revenu pour moitié à Arthur Ashkin (USA), ainsi qu'à Gérard Mourou (France) et Donna Strickland (Canada). Ils sont récompensés pour leurs travaux sur

The new SPS honorary member Prof. Maurice Bourquin discussing thorium technology on the occasion of the Annual Meeting of the Swiss Physical Society (SPS) and the Swiss Institute of Particle Physics (CHIPP) on August 28th at EPF Lausanne.
The risk of thorium-based nuclear power would be acceptable

At the end of August, climate change and the future energy supply of Switzerland were among the topics of several keynote speeches at the Annual Meeting of the Swiss Physical

Wins the CHIPP Prize 2018: Dr. Claudia Tambasco.
Claudia Tambasco honoured with CHIPP Prize 2018

In order for physicists at CERN to carry out their experiments for the understanding of matter, the large particle accelerator LHC must be operated with the utmost precision. Ensuring this

An ATLAS candidate event for the Higgs boson (H) decaying to two bottom quarks (b), in association with a W boson decaying to a muon (µ) and a neutrino (v). Image: ATLAS/CERN.
Long-sought decay of Higgs boson observed

Geneva, 28 August. Six years after its discovery, the Higgs boson has at last been observed decaying to fundamental particles known as bottom quarks. The finding, presented today at CERN