Patrick Koppenburg 🐧

Hello to those who found me here. I am a particle physicist at CERN working on the @lhcb.bsky.social experiment and on future accelerators. In particular I worry about sustainability. I'm also chairing the advisory committee of the 12000 CERN users.

A reminder, because it is almost that time of year: More children are killed by cars on Halloween than any other day of the year, by far. www.vox.com/future-perfe... If you're a parent, I hope you'll do what you can to keep kids safe. If you're driving on Saturday, PLEASE exercise extra caution.

I really started to learn about the physics of pentaquarks when writing an application for a not-funded grant. It was extremely useful. I wonder how the people who outsource that to AI will perform in front of a panel.

Belle approximation, @24heuresch

#HepJobs PostDoc at @tu-dortmund.de on fixed-target collisions in @lhcb.bsky.social and collaboration with the astroparticle group. Cool stuff! inspirehep.net/jobs/3217476

Quelle est la vulnérabilité constitutionnelle de la France? Autrement dit, comment certains mécanismes constitutionnels français (concentration des pouvoirs autour de l’exécutif, ambiguïtés du régime semi-présidentiel français) pourraient être instrumentalisés pour provoquer un recul démocratique ?

🙏 RIP 🧪⚛️

It's #moleday. Your annual reminder that the mass of a mole of moles is bit less than the moon.

That's fun. Try it.

Good slide for a survey methods course

Looks like I'm getting something very very dense.

Shiva is back (and clean).

Cleaned up my follows a bit. Sad to see so many who have not posted for a year. Meanwhile the X algorithm (people I follow) is getting worse by the day. Meta stuff is consistently bad. Social media are killing themselves. 😬

Merci à Sotomo et la RTS d'avoir donné les détails sur l'incertitude du #sondage. C'est pas toujours le cas. www.rts.ch/info/suisse/...

How I arrived on bluesky

Allegedly history does not repeat itself. #sachsenAnhalt

Ab nach Münster #zug

Timeline cleanse with perhaps the most iconic Swiss name for a tiny village section that nevertheless gets its own bus stop: “Cheese and Bread“ 🇨🇭🧀🥖 Or, its official name in Swiss German: “Chäs und Brot” (“Käse und Brot” in standard German)

www.nikhef.nl/en/news-and-...

Cher Guy, un grand 🙏 pour ton engagement sans relâche au service de la 🇨🇭! Que ce soit sur l’économie, la formation ou l’innovation, j’ai profondément apprécié notre collaboration. 🙏🙏 aussi pour ta gentillesse et nos nombreux échanges! Bon vent à toi! www.lematin.ch/story/politi...

Attention arXiv authors. Because of the exponential increase in submissions, arXiv is limiting the number of papers that a person can submit each month to two. blog.arxiv.org/2025/10/31/a...

Jaja, die billige Atomkraft... www.watson.ch/wirtschaft/s...

Today, science became a target for Russia. My heart goes out to the heroes searching for people trapped inside Ukraine’s National Academy of Sciences. As well as to the families and loved ones of the victims of horrific attacks across the country.

Happy birthday CERN! 🎉 #OnThisDay 72 years ago, CERN officially came into being, bringing together 12 founding Member States with a shared vision for science and international collaboration. Discover the story behind 72 years of science: home.cern/about/who-we...

Happy Manekineko

Switzerland: today, voters were called to decide per referendum on two ballots bringing up to 710 votes organised nationwide since 1848. Today’s ballots were two Initiatives. ➤ europeelects.eu/switzerland #CHvote #Abst26 #Votazioni #Votaziuns

Good morning

I am sad to report that a formidable colleague, Ken Lane (Boston U), has died. Ken made many notable contributions, among them his work on the Cornell charmonium model, dynamical symmetry breaking in the form of extended technicolor, and supercollider physics. He shared the 2011 Sakurai Prize. RIP!