I just went for work to Helgoland, where quantum physics was born 100 years ago. Are you a young researcher as excited about quantum physics as I am? And maybe you want to contribute to the next 100 years of quantum physics? Then check out this workshop: indico.desy.de/event/50023/

If you need a reference model of what an extension of the standard model with many new particles would look like, Supersymmetry is a good benchmark. This #CMSPaper shows a general search in many standard signatures, looking for deviations spread over different signatures arxiv.org/abs/2508.13900

Are there invisible (and long-lived) undiscovered particles produced in the decays of B mesons? Those would be super rare, so we use a huge dataset of B mesons with dedicated data taking techniques. We didn't see any new particles though, this #CMSPaper is a #nullresult arxiv.org/abs/2508.06363

This #CMSpaper looks again at a non-significant (but intriguing!) excess in signatures consistent with two unstable, unknown particles from a heavier source. This paper further compares to theory predictions explaining these four-jet events arxiv.org/abs/2507.17884

This CMS Paper explores the excitation of three particles with a B quark and other quark, examining how they store extra energy beyond the ground state. It marks the first simultaneous measurement of these particles. This improves knowledge of particles that contain quarks arxiv.org/abs/2508.05820

Are there undiscovered particles that decay to a Higgs boson and something else? This #CMSPaper describes how we scanned the invariant mass spectrum, but did not find any signs (in very very few events, and this should be rare. We will do this again when we have more data) arxiv.org/abs/2508.11494

Another day, another conference. Today I'm heading to Kiel for the German Conference of Women in Physics (Deutsche Physikerinnentagung), where I will do a panel about science communication. They didn't tell me about the scope, so come for the surprise! Details: indico.desy.de/event/47726/...

The LHC produces a large number of Z bosons. So it is worthwhile checking if some of them behave inconsistently with the standard model. This #CMSPaper measured that the chance that Z bosons decay to two different kinds of leptons is smaller than one in 10 million arxiv.org/abs/2508.07512

Are there undiscovered particles (that are very light for LHC standard) produced in Higgs boson decays? This #CMSPaper describes how we look for them, but did not see any arxiv.org/abs/2508.06947

One might almost think that the consistent Deutsche Bahn delays in Cologne are supported by the local tourist board. Goal: so we can check out the Dom from the platforms. Pic: after 1 hour of bonus Domblick

Completing a PhD is always a journey with ups and downs. But I am extra proud of Dr Eduardo Ploerer ⭐️ Dr Kunal Gautam⭐️ They started PhD during a pandemic, changed official supervisor twice, and moved country 3 times. And did excellent work on detectors, algorithms & physics of FCC-ee #PhDone

Are there invisible (and long-lived) undiscovered particles produced in the decays of B mesons? Those would be super rare, so we use a huge dataset of B mesons with dedicated data taking techniques. We didn't see any new particles though, this #CMSPaper is a #nullresult arxiv.org/abs/2508.06363

This CMS Paper explores the excitation of three particles with a B quark and other quark, examining how they store extra energy beyond the ground state. It marks the first simultaneous measurement of these particles. This improves knowledge of particles that contain quarks arxiv.org/abs/2508.05820

Are there undiscovered particles that decay to a Higgs boson and something else? This #CMSPaper describes how we scanned the invariant mass spectrum, but did not find any signs (in very very few events, and this should be rare. We will do this again when we have more data) arxiv.org/abs/2508.11494

Here's a thread of relaxing fun websites to get away from the noise 1. This is sand dot com Let the sand flow and create weird little landscapes (this is one I did) thisissand.com

I was interviewed, in German btw, in the context of the #Herkommen project that highlights newcomers in Germany. We talked about international mobility, life as an immigrant, and of course particle physics. Auto-dubbing is available! Or enjoy my Süßes Hollandodeutsch 👼 🇳🇱 🇩🇪 youtu.be/JQqh0lPTsLY?...

The LHC produces a large number of Z bosons. So it is worthwhile checking if some of them behave inconsistently with the standard model. This #CMSPaper measured that the chance that Z bosons decay to two different kinds of leptons is smaller than one in 10 million arxiv.org/abs/2508.07512

Are there undiscovered particles (that are very light for LHC standard) produced in Higgs boson decays? This #CMSPaper describes how we look for them, but did not see any arxiv.org/abs/2508.06947

Are there invisible (and long-lived) undiscovered particles produced in the decays of B mesons? Those would be super rare, so we use a huge dataset of B mesons with dedicated data taking techniques. We didn't see any new particles though, this #CMSPaper is a #nullresult arxiv.org/abs/2508.06363

This is a very pivotal moment, I hope the US uses this horrible attack (and yes killing Charlie Kirk is still killing) in a constructive way to turn things around instead of sliding further into fascism.

This CMS Paper explores the excitation of three particles with a B quark and other quark, examining how they store extra energy beyond the ground state. It marks the first simultaneous measurement of these particles. This improves knowledge of particles that contain quarks arxiv.org/abs/2508.05820

This #CMSpaper looks again at a non-significant (but intriguing!) excess in signatures consistent with two unstable, unknown particles from a heavier source. This paper further compares to theory predictions explaining these four-jet events arxiv.org/abs/2507.17884

You may have noticed that I stopped numbering the #CMSPapers I posted about. This is mostly because the numbering is kind of ambiguous. But we have published over 1400 papers (of which 1370+ on LHC data) since 2009 already! check them all out (searchable) here: cms-results-search.web.cern.ch

Are there undiscovered particles that decay to a Higgs boson and something else? This #CMSPaper describes how we scanned the invariant mass spectrum, but did not find any signs (in very very few events, and this should be rare. We will do this again when we have more data) arxiv.org/abs/2508.11494

Join us tomorrow to build power for our scientific community - whether you are a scientist or an ally! Learn more about how to get involved with Stand Up For Science, and register for our ACTION HOUR! REGISTER link 🔗 in bio!

Have you ever wondered why physicists are so excited to study the Higgs Boson at a new Higgs Factory collider? Wonder no more! I explain what a Higgs factory is, why we need one, and the amazing measurements the machine will make. Check it out! Link: youtu.be/xtJgh7yZHkk 🧪⚛️

The LHC produces a large number of Z bosons. So it is worthwhile checking if some of them behave inconsistently with the standard model. This #CMSPaper measured that the chance that Z bosons decay to two different kinds of leptons is smaller than one in 10 million arxiv.org/abs/2508.07512

Are there undiscovered particles (that are very light for LHC standard) produced in Higgs boson decays? This #CMSPaper describes how we look for them, but did not see any arxiv.org/abs/2508.06947

Are there invisible (and long-lived) undiscovered particles produced in the decays of B mesons? Those would be super rare, so we use a huge dataset of B mesons with dedicated data taking techniques. We didn't see any new particles though, this #CMSPaper is a #nullresult arxiv.org/abs/2508.06363

This CMS Paper explores the excitation of three particles with a B quark and other quark, examining how they store extra energy beyond the ground state. It marks the first simultaneous measurement of these particles. This improves knowledge of particles that contain quarks arxiv.org/abs/2508.05820

Great job by Lucia Coll, a student working in my group. Lucia's #scicomm video about why #nullresults are interesting made it to the jury mentions of the national science communication competition #fastforwardscience in Germany. Check out the video here! www.instagram.com/p/DIgx4cNtWo...

This #CMSpaper looks again at a non-significant (but intriguing!) excess in signatures consistent with two unstable, unknown particles from a heavier source. This paper further compares to theory predictions explaining these four-jet events arxiv.org/abs/2507.17884

Want to know more about what particle physics is like, told by others other than only me? Our group's Instagram account gives a voice to a very wide group of scientists For example, a recent post on what safety checks need to be done when taking data with CMS buff.ly/yrv2K0w

Using particles to measure the quark-gluon plasma involves the concept of a Hard Probe, referring to the particle used. This #CMSPaper presents evidence (three sigma level) that Z bosons can serve as a Hard Probe, even leaving a wake in the QGP! arxiv.org/abs/2507.09307

Particle physicists use simulations to distinguish new findings from background collisions at the LHC. This #CMSPaper examines the effectiveness of these simulations, identifying their strengths and weaknesses to select the best tools for specific tasks. More at arxiv.org/abs/2505.17850

(almost) every #CMSPaper has to deal with the fact that not every LHC collision is the interesting signal that the paper focuses on. And this specific CMS paper shows how machine learning can make this background identification better! arxiv.org/abs/2506.08826

This #CMSpaper looks again at a non-significant (but intriguing!) excess in signatures consistent with two unstable, unknown particles from a heavier source. This paper further compares to theory predictions explaining these four-jet events arxiv.org/abs/2507.17884

Top quarks are a great place to test the standard model in detail (because the calculations are relatively easy as top is so much heavier than other quarks). This #CMSPaper checks for different behaviour for top versus the other quark types, just to check that is consistent arxiv.org/abs/2507.17498

Understanding particle transitions from quarks/gluons to jets is complex due to hadronisation. This #CMSPaper examines jets from charm quarks under specific conditions for analytical description, enhancing the understanding of jets and hadronisation arxiv.org/abs/2507.13469

Understanding particle transitions from quarks/gluons to jets is complex due to hadronisation. This #CMSPaper examines jets from charm quarks under specific conditions for analytical description, enhancing the understanding of jets and hadronisation arxiv.org/abs/2507.13469

Particle physicists use simulations to distinguish new findings from background collisions at the LHC. This #CMSPaper examines the effectiveness of these simulations, identifying their strengths and weaknesses to select the best tools for specific tasks. More at arxiv.org/abs/2505.17850

Het toponium-nieuws heeft nu ook het Nederlandse Tijdschrift voor Natuurkunde bereikt. Met dank aan @tristandupree.bsky.social voor de duiding.

Want to know more about what particle physics is like, told by others other than only me? Our group's Instagram account gives a voice to a very wide group of scientists For example, a recent post on what safety checks need to be done when taking data with CMS buff.ly/yrv2K0w

You may have noticed that I stopped numbering the #CMSPapers I posted about. This is mostly because the numbering is kind of ambiguous. But we have published over 1400 papers (of which 1370+ on LHC data) since 2009 already! check them all out (searchable) here: cms-results-search.web.cern.ch

(almost) every #CMSPaper has to deal with the fact that not every LHC collision is the interesting signal that the paper focuses on. And this specific CMS paper shows how machine learning can make this background identification better! arxiv.org/abs/2506.08826

This #CMSpaper looks again at a non-significant (but intriguing!) excess in signatures consistent with two unstable, unknown particles from a heavier source. This paper further compares to theory predictions explaining these four-jet events arxiv.org/abs/2507.17884

Top quarks are a great place to test the standard model in detail (because the calculations are relatively easy as top is so much heavier than other quarks). This #CMSPaper checks for different behaviour for top versus the other quark types, just to check that is consistent arxiv.org/abs/2507.17498

Understanding particle transitions from quarks/gluons to jets is complex due to hadronisation. This #CMSPaper examines jets from charm quarks under specific conditions for analytical description, enhancing the understanding of jets and hadronisation arxiv.org/abs/2507.13469

Using particles to measure the quark-gluon plasma involves the concept of a Hard Probe, referring to the particle used. This #CMSPaper presents evidence (three sigma level) that Z bosons can serve as a Hard Probe, even leaving a wake in the QGP! arxiv.org/abs/2507.09307