We are always looking for new particles that we can use to study the quark gluon plasma. This #CMSPaper shows the phi meson (a bound state consisting of a strange quark and strange antiquark) is quite a useful "hard probe" to measure the QGP in an extra way https://arxiv.org/abs/2504.05193 (yes I know, hard probe is what the jargon is...)

The top quark decays almost always to a bottom quark and a W boson. *almost always*, and how often the exceptions can happen depends on the existence of undiscovered particles. This #CMSPaper looks for the top quark decaying to one up (or charm) quark, a muon and a tau lepton. We didn't see those decays, which would be a sign of charged lepton flavour violation as well, one of the pillars of the standard model https://arxiv.org/abs/2504.08532

Jets, sprays of particles coming from quarks and gluons, cannot easily pass through the blob that is the quark-gluon plasma. That phenomenon is called "jet quenching". This #CMSPaper investigates if that also happens in proton-lead collisions, but with an alternative method where the angles between two jets are taken into account https://arxiv.org/abs/2504.08507

Collisions where three different force carriers interact are uncommon in the standard model and at the LHC. This #CMSpaper 1394 confirms these super-rare collisions that would be much more common if there were other particles (like axions) that could make that signature https://arxiv.org/abs/2503.21977

The W and Z boson, the "photons of the weak force" still carry important and previously unknown information, particularly on how quarks and gluons in protons behave (and stick together) at the high energies of the LHC. This #CMSpaper 1390 measures W and Z boson production arxiv.org/abs/2503.09742

There are many clear signs of #darkmatter from cosmology and astrophysics. This #CMSPaper 1393 looks whether we can make dark matter in LHC collisions, in collisions where one top quark is made potentially with dark matter. We did not see any signs of that in that signature arxiv.org/abs/2503.20033

One of the problems with the standard model is that we use different mathematics for low-energy than for high-energy strong force calculations. The transition region is not so easy. #CMSPaper 1392 measures the transition region for the first time in LHC heavy ion collisions arxiv.org/abs/2503.19993

#CMSPaper 1398 is a meta-analysis of CMS results with Higgs bosons, Z and W bosons, and top quarks. It is interpreted in the Standard Model Effective theory looking for subtle changes with respect to the standard model predictions that are seen over more than one signature arxiv.org/abs/2504.02958

What and how precisely will the LHCb, Belle2, ATLAS and CMS experiments be able to measure 15 years from now? This helps deciding if and what kind of collider to build in the future. #CMSPaper 1397 gives projections for some benchmark important flavour physics results indico.cern.ch/event/143985...

What and how precisely will the ATLAS and CMS experiments be able to measure 15 years from now? This is an important factor in deciding if and what kind of collider to build in the future. This #CMSPaper 1396 gives those projections for some benchmark Higgs physics results arxiv.org/abs/2504.00672

#CMSPaper 1395 observes a totally unexpected extra behaviour of #topquark pair production; we see significantly more top quarks than we expect, and they kind of behave like they come from something particle-like. We are reluctant to just call it Topponium, but very exciting! arxiv.org/abs/2503.22382

Collisions where three different force carriers interact are uncommon in the standard model and at the LHC. This #CMSpaper 1394 confirms these super-rare collisions that would be much more common if there were other particles (like axions) that could make that signature arxiv.org/abs/2503.21977

#CMSpaper soon on arXiv: Measurements of inclusive and differential Higgs boson production cross sections at √s = 13.6 TeV in the H → γγ decay channel (CERN-EP-2025-067) https://cds.cern.ch/record/2930699 #HiggsBoson

There are many clear signs of #darkmatter from cosmology and astrophysics. This #CMSPaper 1393 looks whether we can make dark matter in LHC collisions, in collisions where one top quark is made potentially with dark matter. We did not see any signs of that in that signature arxiv.org/abs/2503.20033

Collisions where three different force carriers interact are uncommon in the standard model and at the LHC. This #CMSpaper 1394 confirms these super-rare collisions that would be much more common if there were other particles (like axions) that could make that signature https://arxiv.org/abs/2503.21977

The W and Z boson, the "photons of the weak force" still carry important and previously unknown information, particularly on how quarks and gluons in protons behave (and stick together) at the high energies of the LHC. This #CMSpaper 1390 measures W and Z boson production https://arxiv.org/abs/2503.09742

There are many clear signs of #darkmatter from cosmology and astrophysics. This #CMSPaper 1393 looks whether we can make dark matter in LHC collisions, in collisions where one top quark is made potentially with dark matter. We did not see any signs of that in that signature https://arxiv.org/abs/2503.20033

One of the problems with the standard model is that we use different mathematics for low-energy than for high-energy strong force calculations. The transition region is not so easy. #CMSPaper 1392 measures the transition region for the first time in LHC heavy ion collisions https://arxiv.org/abs/2503.19993

#CMSPaper 1398 does a meta-analysis of CMS results with Higgs bosons, Z and W bosons, and top quarks. It is interpreted in the Standard Model Effective Theory, looking for subtle changes with respect to the predictions of the standard model that are seen over more than one signature. The plot shows that the predictions agree within 1.7% with the standard model as a whole https://arxiv.org/abs/2504.02958

What and how precisely will the LHCb, Belle2, ATLAS and CMS experiments be able to measure 15 years from now? This is an important factor in deciding if and what kind of collider to build in the future, as an expensive collider should obviously measure something new. This #CMSPaper 1397 gives those projections for some benchmark important physics results (mainly with a focus on b quark precision measurements, things like that) https://indico.cern.ch/event/1439855/contributions/6461613/attachments/3045991/5381958/ESPPU_Joint_Flavour_Physics_Experiment-final.pdf (no @arxiv #openscience fail)