Ambitious #science and definitely particle physics are almost always a #team effort. This is also true for conferences. Here you see Pedro (Portugal), Azwinndini (South Africa), Kate (UK), Sandra (Brazil), and friends, together we presently are organising a track at the #ichep2026 conference

This week I’m at a conference. Physics conferences have of course talks about physics, but about much more! For example this morning, I gave a talk about how we run our group Instagram account (and why we do it that way) #ichep2026 particle physics is #openscience so talk is here: indi.to/vjPHb

This time in random gear I found on campus: the monochromator You’ve probably seen a prism split light into a rainbow. X-rays can be split the same way with a crystal monochromator instead of glass. The antique monochromator in this video is a real piece of that history.

There are 2 postdoctoral positions opening in the CMS group at DESY, more details here: lnkd.in/evBjrzkt (yes they are in my group) Please don't hesitate to forward this job announcement to suitable candidates.

We are celebrating the renewal of our #hamburg #clusterofexcellence #quantumuniverse. With science. And art! And singing physicists !

I love speaking at festivals! Today at Kimiko festival in Aachen. First time the CERN festival programme touches down in Germany 🇩🇪

Ready for some mud and physics at the @kimikofestival as part of the #bigbangcollective. I’m wearing a particularly obscure festival t-shirt. Because I can 👌

How quarks cluster together into hadrons is only partially understood. With heavy quarks it is easier to calculate and measuring bound bottom quark-antiquark pairs is therefor super important to understand this aspect of the strong force. This #CMSPaper measures the Upsilon particles buff.ly/p5QZ00p

Top quarks are usually produced in quark-antiquark pairs, but through the weak interaction, it is possible to create single top quarks too. This #CMSPaper measures one of the single top quark production modes, and provides important input to measure and understand quantum fluctuations inside protons

There are many predictions for undiscovered particles that are similar to the Higgs particle. This #CMSPaper looks for the double whammy: two different undiscovered Higgs-like particles! It is the first time this was done. We didn't see anything but also used limited data arxiv.org/abs/2602.00273

The LHC colllides protons, and protons contain quarks (and gluons). Almost all collisions involve only one quark (or gluon) from each proton, but the super-rare collisions where two particles in the one proton collide simultaneously with two particles in another proton arxiv.org/abs/2602.02770

A DESY scientist walks into a music festival.. not a joke! On Friday, 12 June, I'll be at the CERN Science Hub at @kimikofestival! . Kein Vorwissen nötig. Nur Neugier. / No prior knowledge needed. Just curiosity. kimiko-festival.de/science-tech/

This is a big one: the #CMSPaper summarising all precise Higgs boson measurements on data collected in 2016, 2017 and 2018. We agree with the standard model prediction for the total number of Higgs bosons, within 5-6% those are still big uncertainties for particle physics) arxiv.org/abs/2602.18611

A DESY scientist walks into a music festival.. not a joke! On Friday, 12 June, I'll be at the CERN Science Hub at @kimikofestival talking Am Freitag, 12. Juni bin ich im CERN Science Hub beim @kimikofestival und spreche über die kleinsten Bausteine und die großen Fragen, die sie aufwerfen.

Guess what… today I’m on a train again, from Hamburg to Geneva as next week is CMS collaboration week. (More about that next week). But noteworthy of my 11 hour trans-European train trip today is that DEUTSCHE BAHN IS RUNNING AHEAD OF SCHEDULE. 10 min even. yes very exciting. Hence the all caps.

Tonight (well hopefully soon) I am taking the sleeper train from Stockholm to Hamburg. It is not starting well. We are already delayed even before departing. Something about one of the cars not completely working #trains

You have another chance to see the (may I say: excellent!) science-related short films on the walls of the Science City Hamburg Bahrenfeld campus (aka DESY/UHH campus) on 5 June. #AWallIsAScreen after all awallisascreen.com And yes, there will also be science! On walls :)

Imposter syndrome doesn’t mean you don’t belong. It often means the opposite, that you care deeply about what you do. I asked my colleagues to join me, because many of the most accomplished, world-leading scientists have felt like “frauds” at times. #academia #impostersyndrome #physics

To accurately reconstruct all particles in LHC collision, CMS uses a technique called "Particle Flow". This #CMSPaper shows how the newest, #machinelearning based particle flow algorithm performs in recent data and how well it does at rejecting extra uninteresting collisions arxiv.org/abs/2601.17554

This #CMSPaper measures interactions between photons and Z bosons (quantum particles of electromagnetism and weak force). And measures if there are effects that explain why our universe contains more matter than antimatter. It's the most sensitive result for that signature arxiv.org/abs/2601.14102

This week I am in #stockholm at the #cometa @multibosons European research network. Yesterday I gave a talk for the general public about the large hadron collider, particle physics and the Nobel prize (and I gave a talk for scientists today).

Experiments like CMS need algorithms called a trigger to decide which of the ~ 1 in 1000 events they want to keep (the other 999 are thrown away). This #CMSPaper describes the #machinelearning that is needed to do that for tau leptons arxiv.org/abs/2602.11359

This paper measures the polarisation of gluons within particle cascades. It turns out that the quantum particle of the strong nuclear force needs to be modelled with polarisation to reproduce the data. This #CMSPaper is important for understanding the strong nuclear force arxiv.org/abs/2603.03689

The W boson can decay to leptons (which is how the super-precise W boson mass measurements are done), but most W bosons decay into quarks. Because we know the mass super accurately, this #CMSPaper uses the known W mass to better understand the way quarks from W bosons decay arxiv.org/abs/2603.19963

You may wonder what happens next: CERN has until 2028 to develop a financially feasible funding plan, after which the Council, which is essentially all the science ministries of CERN countries, will make a final go/no-go decision on the FCC-ee project. 5/6

I have a personal connection to this milestone. About 8 years ago I was a convener on the FCC-ee physics studies, back when this was still very much a long-term dream. Being so close to this process from just a crazy idea to a CERN Council decision is very exciting 4/6

FCC-ee would be an electron-positron “Higgs factory that would produce millions of Higgs bosons in clean collisions, letting us measure it with a precision the LHC simply can't match. We’re talking about probing whether the Higgs is exactly what the Standard Model predicts 3/6

For those who follow my CMS paper summaries: the LHC (and its High-Luminosity upgrade) remains the top priority right now, we still have ~15 years of incredible physics ahead of us. But ... what comes AFTER 2041? 2/6

🧵 Big news for particle physics this week, and honestly for me personally too. The CERN Council has officially adopted the updated European Strategy for Particle Physics — and the recommendation is clear: FCC-ee is the preferred next flagship collider after the LHC. 1/6

Are there pairs of undiscovered extra Higgs particles produced? This #CMSPaper looks for those. And doesn't see much, in a very difficult signature where there is not much data yet. But the LHC has only taken 15% of all its data, so more to do! arxiv.org/abs/2602.18223