Experimental particle physics

How can we investigate the particles and forces of the Universe at their most fundamental level? One possibility is to collide particles at very high energies in a laboratory. During the past 50 years, this has been a very successful way to both discover new particles (as well as their possible substructure) and quantify their interactions. We recently built a machine able to accelerate protons to unprecedented energies: the Large Hadron Collider (LHC). I am a member of the ATLAS collaboration, a large experiment aiming at discovering and studying fundamental physics phenomena in high-energy proton-proton collisions. I significantly contributed to the analysis and coordination of various searches for new massive long-lived particles in ATLAS, presently leading the ATLAS searches for magnetic monopoles and launching a new direct search for right-handed neutrinos.

"Don't put all your eggs in one basket." Who first told me that? It must have been my grand-mother... Anyway, it is important to complement the big experiments by following other strategies and coming up with original ideas outside of the mainstream. That kind of thinking motivated my search for monopoles in polar volcanic rocks and my review article on stable massive particles in the cosmos.

Besides ATLAS, I am playing a major role in the MoEDAL experiment, a small-scale LHC detector whose aim is also to discover new physics, but focusing especially on magnetic monopoles.

In addition, I recently joined the SHiP experiment. SHiP is a fixed-target facility and detector proposed at the CERN SPS to search for hidden particles with masses below 2 GeV. In particular, SHiP can probe right-handed neutrinos with couplings that would explain the puzzles of neutrino masses, dark matter, and matter-antimatter asymmetry.

Other interests

My fascination with natural phenomena is not limited to the understanding of its underlying physics principles, but also the origins of life, human nature, and culture.

Life is an amazing structure which, by definition, perpetuates itself. By doing so, it evolves. Features seen within a given species are adaptations, they can be understood as being solutions to an evolutionary problem. This applies to traits which develop universally in all humans - physical and psychological alike. Evolutionary psychology, which studies what all humans have in common, is a fascinating emerging field of science. Understanding our nature is about understanding in which conditions our genes evolved to give us the specific configuration of body and brain shared by all humans today.

But nature is not everything. The conditions in which our brains have been growing since infancy determine a very large part of our personalities and behaviours. The values and customs which have been vehiculed by human society through the generations form what we call our culture. Scientific and technological advances have been so fast during the past few centuries that our culture didn't have time to properly adjust to the changing conditions. In fact, given today's technological possibilities, the capitalist socio-economic system currently ruling the world is outdated and is actually resulting in far more nuisances than benefits. The time has come to start seriously revising societal values and rethinking the way we organise our society - unfortunately such a change will probably need a couple more generations to take place.

As a hobby, I like to write stories in which my thoughts about life, humans and society are expressed with as much imagination and humour as I can muster. Science-fiction does not need to be about new science: to me, it is about staging a new situation in an artfully elaborated thought experiment.

I am also a prolific game designer. I created board games as well as games following the new concept of "parlour games 2.0", i.e., turn-based video games played on the same screen in the same room and designed to encourage interactions between players.