Wow! The picture is terrible, the experience goose bumps!

🎆 150 collisions and thousands of particles detected at once! A special test run allowed CMS to test the next generation of particle-tracking and identifying algorithms, years before the High-Luminosity LHC comes online. 👉 Read more in the CMS Briefing: cms.cern/news/glimpse...

The #ICHEP2026 conference has started, and CMS has a lot of great new results that will be presented there! cms.cern/news/cms-ich...

"Inleiding tot de thermodynamica" als verplichte cursus voor iemand online aankopen mag doen aub dankuwel. #stevenhelpt

When they're done, I know of another project they may be interested in... #FCC

This week I'm at DESY Hamburg for the CMS trigger workshop, where we devise cunning plans to collect great data with CMS at the High Luminosity LHC from 2030 onwards. The big question: how much compute and storage can we afford? Today I tried to bring some physics perspective 😎

🫣

Harry Cliff@harrycliff.bsky.social · 2w ago

It’s official: UKRI has defunded the LHCb upgrade, which would have run at the High Luminosity LHC (currently under construction). This is a disaster for UK physics. We’ve rightly invested heavily in the HL-LHC but without LHCb, we’re throwing away crucial science that can’t be done anywhere else.

That's a first: a signature under a mattermost message. #cernlife

Confused White Cat Asks Why

ALT: Confused White Cat Asks Why

static.klipy.com

Brussels airport has become an extension of Tomorrowland. 8am DJ got quite a crowd 😯 #BRU-HAM

It's also national holiday in our university cantine...

21 juli is geen CERN vakantiedag... 8h vergaderen voor de boeg, waarvan 4 analyse approvals! (Mooie resultaten, dat wel!)

Back from holidays but still with my mind in paradise. [that was our boat for a week; I took the picture]

Impressive analysis, in particular what concerns low-momentum electron reconstruction. Really low-momentum!

CMS Publications@cmspapers.bsky.social · 4w ago

#CMSPAS: Search for inelastic dark matter with low-momentum displaced electrons in proton-proton collisions at sqrt(s) = 13 (CMS-PAS-EXO-24-036) https://cds.cern.ch/record/2966475 #NewPhysics

It's the end of the LHC! 16 years of success! 💪 Next: no beam for several years as the accelerator as well as the experiments get a huge upgrade towards our next milestone: the HL-LHC NB: nice #douglasadams reference.

CERN@cern.bsky.social · 2mo ago

So long #LHC and thank you for all the collisions 👋 Today, the Large Hadron Collider (LHC), the world’s most powerful particle accelerator, comes to the end of an extraordinary chapter in its scientific journey. Find out more: home.cern/cern-bids-fa...

Never throw away your data. Someday someone will have a great idea to test. arxiv.org/abs/2606.21094

Analysis note: Long-range near-side correlation in $e^+e^-$ with $W$-boson-pair events at 183-209 GeV with ALEPH archived data

Events characterized by a high multiplicity of charged particles have been a central focus in the study of collective behavior across both large and small collision systems. A previous measurement of ...

arxiv.org

François Englert (1932 – 2026) It is with great sadness that we announce that Belgian theoretical physicist, François Englert, has passed away at the age of 93. Read more: home.cern/francois-eng...

Many many deadlines are piling up against June 30. Luckily I leave on holidays on July 2nd.

Plate Spinning Stage Performance

ALT: Plate Spinning Stage Performance

static.klipy.com

Nice catching up with @cleonidopoulos.bsky.social !

Christos Leonidopoulos@cleonidopoulos.bsky.social · 2mo ago

Remembering with @stevenlowette.bsky.social the "realistic conference programme adjustments" made to theory talks at the ICHEP conference after the lack of a 750 GeV signal confirmation by ATLAS and CMS. Chicago 2016.

Today in the CMS opening plenary session a slide was shown listing a talk I gave in 2006 😱 Also a picture from 2009 was shown... I'm officially "less young" now 😆

So @geschept.bsky.social I'll be visiting ISOLDE for the first time on Thursday. Clarinval is visiting CERN 😎

Even erg als AI slop is AI reporting. Mensen toch wat een onzin verschijnt er allemaal...

This is a beautiful job! And really sad that it's vacant - the previous editor passed away so young... careers.cern/jobs/sr-eco-...

CERN Courier Editor

careers.cern

A search from our ATLAS friends in pileup collisions - the first one I'm aware of. Nice! I've been working on an untriggered search in pileup myself since many years, but mine is a tricky signature, so it's still not public... arxiv.org/abs/2606.03222

Search for electroweak scale dijet resonances in pile-up collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

A search for dijet resonances in the mass range of 100-250 GeV is presented using proton-proton collision data recorded by the ATLAS experiment at the Large Hadron Collider at a centre-of-mass energy ...

arxiv.org

Of all the harm this administration has done to US science, today's proposed changes to the way federal grants are awarded and administered is the most damaging yet. The text of the federal register document is impenetrably tedious by design, so here's an excellent summary of what it says.

elizabethginexi.bsky.social@elizabethginexi.bsky.social · 3mo ago

Summary of Key Changes in OMB’s Proposed Federal Financial Assistance Rule. Russell Vought is going destroy American Science. elizabethginexi.substack.com/p/summary-of...

Huh, sounds terrible... 🧐 Lawmakers propose banning all U.S.-Chinese research collaborations | Science | AAAS www.science.org/content/arti...

Lawmakers propose banning all U.S.-Chinese research collaborations

Critics say bill would weaken U.S. science by cutting flows of ideas and talent

science.org

On the arXiv today, a paper resulting from the PhD analysis by a former student of mine. Very proud! arxiv.org/abs/2605.27875

Search for light scalar particles produced in Higgs boson decays in exclusive final states with two muons and two hadrons in proton-proton collisions at $\sqrt{s}$ = 13 TeV

A search for new scalar particles of $\mathcal{O}$(GeV) mass in exclusive final states with muons and light hadrons is presented. The analysis uses proton-proton collision data produced at a center-of...

arxiv.org

😯 I know several colleagues in that situation. Very disruptive if followed through.

Sumitra Badrinathan@sumitra.bsky.social · 3mo ago

lots of discussion on how this will affect tech jobs, but once again this applies to academia also every professor you know on a visa will now have to leave the US for a green card, sometimes for multiple years. many will give up in the process. universities may not give them back their jobs.

We zijn op zoek naar een nieuwe assistent in onze vakgroep fysica! jobs.vub.be/job/Elsene-M...

🥳

CMS Experiment at CERN@cmsexperiment.bsky.social · 3mo ago

This is not a goodbye! 👋 Today the CMS shift crew celebrated the last proton collisions of LHC Run 3. The next time CMS will detect again particles from proton collisions will be in four years!

Now it's official: I've been appointed the next physics coordinator for the CMS experiment. Looking forward to two years of very exciting adventures! press.vub.ac.be/vrije-univer...

Vrije Universiteit Brussel professor Steven Lowette appointed to top position within world-famous CMS experiment at CERN

"I will begin my mandate with an enormous dataset that remains largely unexplored"

press.vub.ac.be