Patrick Koppenburg 🐧
@koppenburg.ch
Nikhef physicist at LHCb Experiment at CERN. Exotic Hadrons, European strategy for particle physics, Sustainable Accelerators. Chair of CERN users committee ACCU.
🐧📷🎓💻💫.
Born at 327.55 ppm CO₂. Président du PVL La Côte. 🟢🔵
🐧📷🎓💻💫.
Born at 327.55 ppm CO₂. Président du PVL La Côte. 🟢🔵
Pinned
Patrick Koppenburg 🐧
@koppenburg.ch
· Oct 17
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.
I'm also chairing the advisory committee of the 12000 CERN users.
When I twisted off the cap of my deo at the hotel, the ball immediately popped out.
In hindsight no surprise: we were at 1675m altitude, where the pressure is 13% lower than at home. #dailyphysics ⚛️
In hindsight no surprise: we were at 1675m altitude, where the pressure is 13% lower than at home. #dailyphysics ⚛️
December 27, 2025 at 7:39 PM
When I twisted off the cap of my deo at the hotel, the ball immediately popped out.
In hindsight no surprise: we were at 1675m altitude, where the pressure is 13% lower than at home. #dailyphysics ⚛️
In hindsight no surprise: we were at 1675m altitude, where the pressure is 13% lower than at home. #dailyphysics ⚛️
Weisshorn, Zinalrothorn, Ober Gabelhorn, Dent Blanche. All above 4000m. (Matterhorn just hidden).
December 26, 2025 at 8:39 PM
Weisshorn, Zinalrothorn, Ober Gabelhorn, Dent Blanche. All above 4000m. (Matterhorn just hidden).
Fantastic to see the water divides like here Rhone Vs Rhine in Pompaples, or Rhine Vs Danube in Allgäu.
December 25, 2025 at 10:24 AM
Fantastic to see the water divides like here Rhone Vs Rhine in Pompaples, or Rhine Vs Danube in Allgäu.
🔁 Loop closing. 24 years ago I submitted my thesis that described how well LHCb could measure asymmetries in this very rare decay, notably A_FB, with 5 years of running. Now we publish this result, with many more asymmetries and intriguing discrepancies with the theoretical prediction. ⚛️🧵
🎄A comprehensive analysis of the B⁰→ K*⁰μ⁺μ⁻ decay arxiv.org/abs/2512.18053 - The measurements of the CP-averaged observables and the branching fractions continue to exhibit the pattern of tensions with the Standard Model predictions that have been seen in previous analyses.
December 24, 2025 at 2:56 PM
🔁 Loop closing. 24 years ago I submitted my thesis that described how well LHCb could measure asymmetries in this very rare decay, notably A_FB, with 5 years of running. Now we publish this result, with many more asymmetries and intriguing discrepancies with the theoretical prediction. ⚛️🧵
Acronym of day: HEPTAPOD arxiv.org/abs/2512.15867
December 19, 2025 at 12:27 PM
Acronym of day: HEPTAPOD arxiv.org/abs/2512.15867
#HepJobs Professorship in Dortmund in the tCluster of Excellence “Color meets Flavor”. service.tu-dortmund.de/documents/18...
service.tu-dortmund.de
December 19, 2025 at 8:40 AM
#HepJobs Professorship in Dortmund in the tCluster of Excellence “Color meets Flavor”. service.tu-dortmund.de/documents/18...
That's what this place is for
Absolutely nobody asked for this BUT
English Anglican cathedrals that have burned down, fallen over, and sank into the swamp: a thread.
English Anglican cathedrals that have burned down, fallen over, and sank into the swamp: a thread.
December 18, 2025 at 10:08 PM
That's what this place is for
Reposted by Patrick Koppenburg 🐧
Work! Our lovely institute (@api.uva.nl) is looking for a new Institute Manager - so if you fancy trying to make sense of the mysteries of university project budgets, and herding a bunch of mostly well-behaved astronomer-cats, JOIN US!!!
werkenbij.uva.nl/vacatures/in...
werkenbij.uva.nl/vacatures/in...
Vacature — Instituutsmanager Anton Pannekoek Instituut voor Sterrenkunde
<p>Voel jij je thuis in de universitaire wereld en houd je van uitdagingen op het gebied van bedrijfsvoering? Wie weet ben jij dan onze nieuwe instituutsmanager!</p>
werkenbij.uva.nl
December 18, 2025 at 10:19 AM
Work! Our lovely institute (@api.uva.nl) is looking for a new Institute Manager - so if you fancy trying to make sense of the mysteries of university project budgets, and herding a bunch of mostly well-behaved astronomer-cats, JOIN US!!!
werkenbij.uva.nl/vacatures/in...
werkenbij.uva.nl/vacatures/in...
22000, 20000, 11000. It's not the point of the paper, but I am amazed by the absolute numbers of participants. The largest particle physics conference I ever attended had about 1000 attendees.
December 17, 2025 at 8:18 AM
22000, 20000, 11000. It's not the point of the paper, but I am amazed by the absolute numbers of participants. The largest particle physics conference I ever attended had about 1000 attendees.
Reposted by Patrick Koppenburg 🐧
Contact importer just landed.
December 17, 2025 at 12:48 AM
Contact importer just landed.
Fabiola's last meeting with the CERN community starting now.
December 16, 2025 at 9:35 AM
Fabiola's last meeting with the CERN community starting now.
Reposted by Patrick Koppenburg 🐧
Réponse de l'image-mystère :
Voici ETpathfinder, une infrastructure de R&D dédiée aux essais et au prototypage de concepts innovants et de technologies clés pour le télescope Einstein, premier d'une nouvelle génération d'observatoires d'ondes gravitationnelles.
www.etpathfinder.eu
1/2
Voici ETpathfinder, une infrastructure de R&D dédiée aux essais et au prototypage de concepts innovants et de technologies clés pour le télescope Einstein, premier d'une nouvelle génération d'observatoires d'ondes gravitationnelles.
www.etpathfinder.eu
1/2
Dernière semaine avant la pause de fin d'année.
Plus que 5 images-mystère à trouver cette semaine !
Allez, on commence avec celle-ci.
Que voyons-nous ici, à votre avis ?
Je vous laisse mettre vos propositions en commentaires et je posterai la réponse en fin de journée.
Plus que 5 images-mystère à trouver cette semaine !
Allez, on commence avec celle-ci.
Que voyons-nous ici, à votre avis ?
Je vous laisse mettre vos propositions en commentaires et je posterai la réponse en fin de journée.
December 15, 2025 at 4:53 PM
Réponse de l'image-mystère :
Voici ETpathfinder, une infrastructure de R&D dédiée aux essais et au prototypage de concepts innovants et de technologies clés pour le télescope Einstein, premier d'une nouvelle génération d'observatoires d'ondes gravitationnelles.
www.etpathfinder.eu
1/2
Voici ETpathfinder, une infrastructure de R&D dédiée aux essais et au prototypage de concepts innovants et de technologies clés pour le télescope Einstein, premier d'une nouvelle génération d'observatoires d'ondes gravitationnelles.
www.etpathfinder.eu
1/2
What could that be? 😁
Dernière semaine avant la pause de fin d'année.
Plus que 5 images-mystère à trouver cette semaine !
Allez, on commence avec celle-ci.
Que voyons-nous ici, à votre avis ?
Je vous laisse mettre vos propositions en commentaires et je posterai la réponse en fin de journée.
Plus que 5 images-mystère à trouver cette semaine !
Allez, on commence avec celle-ci.
Que voyons-nous ici, à votre avis ?
Je vous laisse mettre vos propositions en commentaires et je posterai la réponse en fin de journée.
December 15, 2025 at 9:13 AM
What could that be? 😁
Reposted by Patrick Koppenburg 🐧
Les Suissesses sont les nouvelles championnes du monde de unihockey. Elles ont remporté l'or mondial en battant la Tchéquie, pays hôte de la compétition, dimanche à Ostrava (2-0).
Quel exploit en Tchéquie!: Les Suissesses sont championnes du monde de unihockey
Les Suissesses sont les nouvelles championnes du monde de unihockey. Elles ont remporté l'or mondial en battant la Tchéquie, pays hôte de la compétition, dimanche à Ostrava (2-0).
www.blick.ch
December 14, 2025 at 5:33 PM
Les Suissesses sont les nouvelles championnes du monde de unihockey. Elles ont remporté l'or mondial en battant la Tchéquie, pays hôte de la compétition, dimanche à Ostrava (2-0).
Reposted by Patrick Koppenburg 🐧
European particle physics strategy update summary 😅
December 12, 2025 at 4:08 PM
European particle physics strategy update summary 😅
Reposted by Patrick Koppenburg 🐧
This annoyed me so much I had to write a thing. www.physicsmatt.com/blog/2025/12...
December 12, 2025 at 1:57 AM
This annoyed me so much I had to write a thing. www.physicsmatt.com/blog/2025/12...
New York, Massachusetts, Rhode Island and Connecticut should be pulled out of the US and join the EU. A propos nothing.
December 11, 2025 at 10:33 AM
New York, Massachusetts, Rhode Island and Connecticut should be pulled out of the US and join the EU. A propos nothing.
Reposted by Patrick Koppenburg 🐧
Excellente nouvelle pour nos belles traditions 🇨🇭! 👏👏👏
www.letemps.ch/culture/musi...
www.letemps.ch/culture/musi...
Le yodel inscrit au patrimoine culturel immatériel de l’UNESCO - Le Temps
Le chant emblématique de la Suisse a rejoint ce jeudi le patrimoine mondial. Dans sa décision, l'UNESCO souligne la qualité du dossier. L’association des yodleurs évoque un «magnifique signe de reconn...
www.letemps.ch
December 11, 2025 at 7:40 AM
Excellente nouvelle pour nos belles traditions 🇨🇭! 👏👏👏
www.letemps.ch/culture/musi...
www.letemps.ch/culture/musi...
Reposted by Patrick Koppenburg 🐧
Reposted by Patrick Koppenburg 🐧
Thanks to the whole LHC crew!
December 8, 2025 at 6:46 AM
Thanks to the whole LHC crew!
Comments (07:15:33) @
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HI
HHI
[1
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HI
HHI
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December 7, 2025 at 9:22 AM
Reposted by Patrick Koppenburg 🐧
Looks like the accelerator ops @cern.bsky.social are getting festive!
December 6, 2025 at 5:31 AM
Looks like the accelerator ops @cern.bsky.social are getting festive!
Just caught the moon disappearing behind the Jura
December 5, 2025 at 8:10 AM
Just caught the moon disappearing behind the Jura