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.
The @lhcb.bsky.social data on "Measurement of exclusive J/ψ and ψ(2S) production at √s=13 TeV" is finally there! That took some time. Totally my mistake. #procrastination www.hepdata.net/record/ins28...
January 15, 2026 at 12:42 PM
The @lhcb.bsky.social data on "Measurement of exclusive J/ψ and ψ(2S) production at √s=13 TeV" is finally there! That took some time. Totally my mistake. #procrastination www.hepdata.net/record/ins28...
First @cern.bsky.social new year address to the personnel with Mark Thomson. First time in the Science Gateway auditorium.
January 13, 2026 at 9:11 AM
First @cern.bsky.social new year address to the personnel with Mark Thomson. First time in the Science Gateway auditorium.
Reposted by Patrick Koppenburg 🐧
It is not surprising to me that Erich von Daniken (RIP, 1935–2026) found credulous readers for his crackpot astro/archaeology books. What is more surprising is that he also built a crackpot theme park in Switzerand and attracted >200k visitors a year (2003–2006)🧪 en.wikipedia.org/wiki/Jungfra...
Jungfrau Park - Wikipedia
en.wikipedia.org
January 12, 2026 at 3:36 AM
It is not surprising to me that Erich von Daniken (RIP, 1935–2026) found credulous readers for his crackpot astro/archaeology books. What is more surprising is that he also built a crackpot theme park in Switzerand and attracted >200k visitors a year (2003–2006)🧪 en.wikipedia.org/wiki/Jungfra...
Reposted by Patrick Koppenburg 🐧
Garfield the cat made his first appearance 50 years ago today!
January 9, 2026 at 6:04 AM
Garfield the cat made his first appearance 50 years ago today!
Things LHCb cannot do, example n+1. I gave a talk at the 2007 LHCb-UK rare decays workshop explaining why this decay mode was impossible to see at LHCb. Happy to be proved wrong.
First evidence of the Bₛ⁰→K⁻π⁺γ decay arxiv.org/abs/2601.03083 - The photons are reconstructed through their conversion into an electron-positron pair, which significantly improves the mass resolution. A signal excess with a significance of 3.5 standard deviations is measured.
January 7, 2026 at 7:27 AM
Things LHCb cannot do, example n+1. I gave a talk at the 2007 LHCb-UK rare decays workshop explaining why this decay mode was impossible to see at LHCb. Happy to be proved wrong.
Never seen so many collaborations listed as in this paper from 2017 arxiv.org/pdf/1710.05833 . Should that be "LIGO et al. collaborations"?
January 6, 2026 at 7:40 AM
Never seen so many collaborations listed as in this paper from 2017 arxiv.org/pdf/1710.05833 . Should that be "LIGO et al. collaborations"?
Reposted by Patrick Koppenburg 🐧
Le saviez vous? A 18h15 (heure de Paris), la Terre sera au plus proche du Soleil: environ 147 millions de km. Le 6 juillet, elle sera à plus de 152 millions de km... mais il devrait faire plus chaud en France. Joyeux réveillon du Périhélie ce soir donc! (© IMCCE)
January 3, 2026 at 4:46 PM
Le saviez vous? A 18h15 (heure de Paris), la Terre sera au plus proche du Soleil: environ 147 millions de km. Le 6 juillet, elle sera à plus de 152 millions de km... mais il devrait faire plus chaud en France. Joyeux réveillon du Périhélie ce soir donc! (© IMCCE)
Je ne sais pas si c'est autorisé par les règles du jeu, mais je je soutiens ni les autocrates de droite, ni les autocrates de gauche. #subtweet
January 3, 2026 at 11:35 AM
Je ne sais pas si c'est autorisé par les règles du jeu, mais je je soutiens ni les autocrates de droite, ni les autocrates de gauche. #subtweet
- Faisons un t-shirt dinosaure pour les filles 🦕
- Bonne idée! On va dépasser les stéréotypes de genre !
Le t-shirt :
- Bonne idée! On va dépasser les stéréotypes de genre !
Le t-shirt :
January 2, 2026 at 7:03 PM
- Faisons un t-shirt dinosaure pour les filles 🦕
- Bonne idée! On va dépasser les stéréotypes de genre !
Le t-shirt :
- Bonne idée! On va dépasser les stéréotypes de genre !
Le t-shirt :
Mark Thomson was probably not expecting his first e-mail to all @cern.bsky.social would be about flying flags half-mast 😥 #Crans_Montana
January 2, 2026 at 5:16 PM
Mark Thomson was probably not expecting his first e-mail to all @cern.bsky.social would be about flying flags half-mast 😥 #Crans_Montana
"SpaceTimePilot: Generative Rendering of Dynamic Scenes Across Space and Time" is the last #arxiv preprint of 2025 (in @arxiv-cs-cv.bsky.social), just 3 seconds before the deadline.
(By @ygryadit.bsky.social and others not on bsky.)
Let's now wait to see who won the race for 2601.00001 .
(By @ygryadit.bsky.social and others not on bsky.)
Let's now wait to see who won the race for 2601.00001 .
SpaceTimePilot: Generative Rendering of Dynamic Scenes Across Space and Time
We present SpaceTimePilot, a video diffusion model that disentangles space and time for controllable generative rendering. Given a monocular video, SpaceTimePilot can independently alter the camera vi...
arxiv.org
January 2, 2026 at 8:53 AM
"SpaceTimePilot: Generative Rendering of Dynamic Scenes Across Space and Time" is the last #arxiv preprint of 2025 (in @arxiv-cs-cv.bsky.social), just 3 seconds before the deadline.
(By @ygryadit.bsky.social and others not on bsky.)
Let's now wait to see who won the race for 2601.00001 .
(By @ygryadit.bsky.social and others not on bsky.)
Let's now wait to see who won the race for 2601.00001 .
Premier Janvier 2026. Moutier est Jurassienne. Le site de Swisstopo est à jour 👍. Google maps pas encore. 👎
map.geo.admin.ch
map.geo.admin.ch
January 1, 2026 at 8:59 AM
Premier Janvier 2026. Moutier est Jurassienne. Le site de Swisstopo est à jour 👍. Google maps pas encore. 👎
map.geo.admin.ch
map.geo.admin.ch
Impressive stretch of frost on the trees of the Jura between about 700 and 800m altitude. That's where the fog was until it got blown away by the wind.
December 31, 2025 at 3:28 PM
Impressive stretch of frost on the trees of the Jura between about 700 and 800m altitude. That's where the fog was until it got blown away by the wind.
This year on Bluesky I wrote 388 posts and 1 060 replies. I received 4 955 likes, whereas 135 was from my most popular post, and apparently I love saying "its" and ⚛️!
www.madebyolof.com/bluesky-wrap...
www.madebyolof.com/bluesky-wrap...
koppenburg.ch's Bluesky Wrapped 2025
Check out koppenburg.ch's year on Bluesky!
www.madebyolof.com
December 31, 2025 at 8:37 AM
This year on Bluesky I wrote 388 posts and 1 060 replies. I received 4 955 likes, whereas 135 was from my most popular post, and apparently I love saying "its" and ⚛️!
www.madebyolof.com/bluesky-wrap...
www.madebyolof.com/bluesky-wrap...
Amusing that In my local bookstore #marvel and #DC comicsl (branded #UrbanComics in 🇫🇷) are under "bande dessinée alternative" while in the US alternative would be everyone else (?). It's a single shelf among 6 bookcases (2 of which are manga).
December 30, 2025 at 8:29 AM
Amusing that In my local bookstore #marvel and #DC comicsl (branded #UrbanComics in 🇫🇷) are under "bande dessinée alternative" while in the US alternative would be everyone else (?). It's a single shelf among 6 bookcases (2 of which are manga).
La #Migros vend des galettes des rois avec une date de péremption précédent l'Epiphanie de plus d'une semaine. Forcément, elles sont en action aujourd'hui. Après on s'étonne du gaspillage alimentaire. 🙄
#gaspillagealimentaire
#gaspillagealimentaire
December 29, 2025 at 6:13 PM
La #Migros vend des galettes des rois avec une date de péremption précédent l'Epiphanie de plus d'une semaine. Forcément, elles sont en action aujourd'hui. Après on s'étonne du gaspillage alimentaire. 🙄
#gaspillagealimentaire
#gaspillagealimentaire
Reposted by Patrick Koppenburg 🐧
Welcome to the thrilling Quarterfinal round of the 2025 Headline of the Year contest! (🎆🎆)
Mostly proceeded according to seeds, but second seed Resolved and Unresolved had a close scare with the Drunk Raccoon.
Let's review the results so far:
Mostly proceeded according to seeds, but second seed Resolved and Unresolved had a close scare with the Drunk Raccoon.
Let's review the results so far:
December 28, 2025 at 11:09 PM
Welcome to the thrilling Quarterfinal round of the 2025 Headline of the Year contest! (🎆🎆)
Mostly proceeded according to seeds, but second seed Resolved and Unresolved had a close scare with the Drunk Raccoon.
Let's review the results so far:
Mostly proceeded according to seeds, but second seed Resolved and Unresolved had a close scare with the Drunk Raccoon.
Let's review the results so far:
Read the 12 years old "Serving the Reich" by @philipcball.bsky.social about Planck, Debye and Heisenberg, and Physics in Nazi Germany. He draws a parallel to recent (2013) events in the US. What would he write today?
December 28, 2025 at 9:13 PM
Read the 12 years old "Serving the Reich" by @philipcball.bsky.social about Planck, Debye and Heisenberg, and Physics in Nazi Germany. He draws a parallel to recent (2013) events in the US. What would he write today?
Today everyone remembers Daniel Brélaz, the world's first green MP in a national parliament.
When he was mayor of Lausanne, he would often be standing in front of my high school waiting to have lunch with my IT teacher (who was chairing the local Green party).
#RIP
When he was mayor of Lausanne, he would often be standing in front of my high school waiting to have lunch with my IT teacher (who was chairing the local Green party).
#RIP
December 28, 2025 at 11:57 AM
Today everyone remembers Daniel Brélaz, the world's first green MP in a national parliament.
When he was mayor of Lausanne, he would often be standing in front of my high school waiting to have lunch with my IT teacher (who was chairing the local Green party).
#RIP
When he was mayor of Lausanne, he would often be standing in front of my high school waiting to have lunch with my IT teacher (who was chairing the local Green party).
#RIP
In the category useless statistics: My 932 papers listed by #inspirehep now total 100307 citations.
www.koppenburg.ch/papers.html#...
www.koppenburg.ch/papers.html#...
Patrick Koppenburg's publications
Below I list all my 932 publications in chronological order. 883 are published. The articles listed above are repeated. In total there are 100307 citations, i.e. 108 per paper.
www.koppenburg.ch
December 28, 2025 at 8:41 AM
In the category useless statistics: My 932 papers listed by #inspirehep now total 100307 citations.
www.koppenburg.ch/papers.html#...
www.koppenburg.ch/papers.html#...
Reposted by Patrick Koppenburg 🐧
Voting ends about 2:30 pm MT on December 28 -- then on to the quarterfinals!
🎆Welcome to the Round of 16 of the 2025 Headline of the Year Contest!🎆
Voting will be open in 4 locations for each round for about a day.
16 headlines.
Only 1 winner.
A reminder of the nominees:
bsky.app/profile/paul...
Voting will be open in 4 locations for each round for about a day.
16 headlines.
Only 1 winner.
A reminder of the nominees:
bsky.app/profile/paul...
The 2025 Headline of the Year Nominees
🧵
🧵
December 28, 2025 at 4:30 AM
Voting ends about 2:30 pm MT on December 28 -- then on to the quarterfinals!