Particle physics probes the basic building blocks of matter and their interactions, which determine the structure and properties of the extreme diversity of matter in the universe. The web portal makes the fascinating research understandable to an interested public.more

Image: ESO, R. Fosburymore
Proton-Proton Collision (LHC, CERN)

Modern physics relies on an elegant «Standard Model of particle physics», a quantum field theory based on three symmetries and a symmetry breaking. This theory describes and explains magnificently all experimental results obtained so far. With the discovery of the Higgs particle in 2012 at the Large Hadron Collider at CERN, the last missing piece of the Standard Model has been experimentally confirmed. Experiments at CERN and at other international laboratories now continue to test the validity and limits of the Standard Model in ever widening scope. However, for a comprehensive understanding of the laws of nature a theory beyond the Standard Model is needed, which should include gravitation and explain the presence of dark matter and dark energy in the universe.

Events, News, Publications

Prof. Martin Hoferichter has held a professorship at the University of Bern since 2020, funded by the Eccellenza programme of the Swiss National Science Foundation.
Various results shake up the Standard Model

At the beginning of April, the US research laboratory Fermilab published a new result for the magnetic dipole moment of the muon. The result caused a broad media response because

Image: M. Hoferichter
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:

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

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

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

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

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

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

Pokale Prix Schläfli
SCNAT honours the four best dissertations in sciences

Controlling the amount of phosphate in cells, the processes involved in catalysts, land use in Madagascar and a paradox of quantum physics – these are the topics for which the

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, Secretary general of SCNAT
What large-scale research facilities does Switzerland need?

The Swiss Academies of Arts and Sciences have been requested by the Confederation to prepare roadmaps for research infrastructures for the various scientific fields. These roadmaps will provide a basis

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 - International Year of the Periodic Table of the Chemical Elements

The Periodic Table of Chemical Elements is one of the most significant achievements in science, capturing the essence not only of chemistry, but also of physics and biology. 1869 is

Sphinx-Observatorium der Hochalpinen Forschungsstation Jungfraujoch
Top of Europe: ausgezeichnete Forschung auf 3450 Metern über Meer

In Zeiten, in denen sich viele Länder Europas abschotteten, eröffnete die Schweiz die international ausgerichtete Forschungsstation Jungfraujoch. Mehrere Nobelpreisträger haben dort geforscht. Die Station erhält 2019 gleich zwei Auszeichnungen als

Luftaufnahme des Fricktals im Kanton Aargau
SCNAT creates the largest knowledge network on the landscape

Sprawl, loss of landscape diversity and biodiversity, mountain landscapes marked by climate change: Starting in 2019, the Academy of Natural Sciences (SCNAT) is merging various of its activities in the

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

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

Nobel Prize in Physics 2018
Tools made of light: Nobel Prize in Physics 2018

The Royal Swedish Academy of Sciences has awarded the Nobel Prize in Physics 2018 with one half to Arthur Ashkin (USA) and the other half jointly to Gérard Mourou (France)

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