Comparison of the photons to the standard model, in the Zeppenfeld variable
This #CMSPaper looks for production of photons in these boson collisions, meaning the LHC is a W boson collider, which is the first time this has ever been seen! It measures properties of the photons produced and compares them to the standard model predictions arxiv.org/abs/2512.00502
distribution of Z bosons and photons.
This #CMSPaper measures the simultaneous production of Z bosons and photons. That way their interactions can be measured and can be compared to predictions by the standard model arxiv.org/abs/2512.08582
dimuon invariant mass distribution. No significant bumps to be seen.
Are there extra Z-boson like undiscovered particles made at higher mass? Or did we miss them because they can only see them when they're made together with quarks? This #CMSPaper scans the dimuon spectrum - it is a #nullresult (no extra Z' bosons spotted!) arxiv.org/abs/2511.11853
machine learning is used to find these displaced taus, by rejecting all other tau-like things coming from the standard model. This plot shows what score between 0 and 1 the machine learning gives a displaced tau candidate.
If there are supersymmetry versions of tau leptons (creatively called stau/scalar-tau), they could create signatures where normal taus appear in the middle of the CMS detector. This #CMSPaper looks for displaced taus, and describes the #machinelearning needed to spot them arxiv.org/abs/2601.17576
there are some excesses in this analysis by the way, but nothing too exciting yet. Stay tuned, we have a lot more data in hand!
Are there undiscovered charged heavy Higgs bosons? If they are heavier than the top quark, they would decay into a top quark + b quark signature. This #CMSPaper looks for these, and also compares them in dedicated theory frameworks that include neutral heavy Higgs bosons arxiv.org/abs/2512.24471
Comparison of different (supervised) machine learning searches
One of the classical ways to look for undiscovered particles at the LHC is to look for unexpected resonances in the jets coming from quarks and gluons. This #CMSPaper compares the cutting edge of #machinelearnining #ai methods to see how well they do for top quark resonances arxiv.org/abs/2512.20395
measuring missing energy relies on precisely measuring every particle in the collision, and here you see how well the ML does
To accurately reconstruct all particles in LHC collision, CMS uses a technique called "Particle Flow". This #CMSPaper shows how the newest, #machinelearning based particle flow algorithm performs in recent data and how well it does at rejecting extra uninteresting collisions arxiv.org/abs/2601.17554
the standard model cannot explain why there is more matter than antimatter. And this result agrees with the standard model, which is why the little cross is inside the big yellow ellipse
This #CMSPaper measures interactions between photons and Z bosons (quantum particles of electromagnetism and weak force). And measures if there are effects that explain why our universe contains more matter than antimatter. It's the most sensitive result for that signature arxiv.org/abs/2601.14102
#CMSpaper: Search for low-mass vector and scalar resonances decaying into a quark-antiquark pair in proton-proton collisions at √s = 13 TeV (arXiv:2603.21965) https://arxiv.org/abs/2603.21965 #NewPhysics
spin behaviour of top quarks (versus the mass of the production system) in data (points) and different standard model calculations (red and blue lines)
This #CMSPaper measures the spin behaviour of top quark pairs. As that also can be calculated accurately in the standard model, it is important information to check precision measurements (and has links to things like quantum entanglement of top quarks) arxiv.org/abs/2512.17557
#CMSpaper: Search for new particles decaying into top quark-antiquark pairs in proton-proton collisions at √s = 13 TeV (arXiv:2603.23454) https://arxiv.org/abs/2603.23454 #NewPhysics
#CMSpaper: Measurement of dijet angular distributions and search for beyond the standard model physics in proton-proton collisions at √s = 13 TeV (arXiv:2603.25458) https://arxiv.org/abs/2603.25458 #NewPhysics
#CMSpaper soon on arXiv: Measurement of dijet angular distributions and search for beyond the standard model physics in proton-proton collisions at √s = 13 TeV (CERN-EP-2026-057) https://cds.cern.ch/record/2957886 #NewPhysics
#CMSpaper soon on arXiv: Search for new particles decaying into top quark-antiquark pairs in proton-proton collisions at √s = 13 TeV (CERN-EP-2026-049) https://cds.cern.ch/record/2957871 #NewPhysics
#CMSpaper soon on arXiv: Search for low-mass vector and scalar resonances decaying into a quark-antiquark pair in proton-proton collisions at √s = 13 TeV (CERN-EP-2025-213) https://cds.cern.ch/record/2957811 #NewPhysics
#CMSpaper: Search for Higgs boson production at high transverse momentum in the WW decay channel in proton-proton collisions at √s = 13 TeV (arXiv:2603.22233) https://arxiv.org/abs/2603.22233 #HiggsBoson
#CMSpaper: Measurement of the jet mass in hadronic decays of boosted W bosons at 13 TeV and extraction of the W boson mass (arXiv:2603.19963) https://arxiv.org/abs/2603.19963 #StandardModel
Even with four years of data, diboson resonances below ~ 1.5 TeV cannot be easily excluded for some models like the one in this plot.
Are there new heavy particles that decay to the Higgs, W or Z bosons we know from the standard model? This #CMSPaper compares and combines the very diverse techniques used on the data collected during 2015-2018, and gives a final say on what we can (and cannot) exclude arxiv.org/abs/2601.12583
#CMSpaper soon on arXiv: Search for Higgs boson production at high transverse momentum in the WW decay channel in proton-proton collisions at √s = 13 TeV (CERN-EP-2026-033) https://cds.cern.ch/record/2957732 #HiggsBoson
#CMSpaper soon on arXiv: Measurement of the jet mass in hadronic decays of boosted W bosons at 13 TeV and extraction of the W boson mass (CERN-EP-2026-034) https://cds.cern.ch/record/2957729 #StandardModel
#CMSpaper: Measurement of the t-channel single top quark cross section in proton-proton collisions at √s = 5.02 TeV (arXiv:2603.13592) https://arxiv.org/abs/2603.13592 #TopQuark
#CMSpaper: Jet peak shapes based on two-particle angular correlations in lead-lead collisions at √(s_NN) = 5.02 TeV (arXiv:2603.14385) https://arxiv.org/abs/2603.14385 #HeavyIons
#CMSpaper soon on arXiv: Jet peak shapes based on two-particle angular correlations in lead-lead collisions at √(s_NN) = 5.02 TeV (CERN-EP-2025-112) https://cds.cern.ch/record/2957508 #HeavyIons
#CMSpaper soon on arXiv: Measurement of the t-channel single top quark cross section in proton-proton collisions at √s = 5.02 TeV (CERN-EP-2025-289) https://cds.cern.ch/record/2957466 #TopQuark
scanning the four-lepton invariant mass spectrum, no bumps visible
The Higgs boson can decay to many different particles from the standard model. But... is the Higgs boson also decaying to undiscovered particles? This #CMSPaper looks for extra (light) bosons that would create the Higgs boson to four electron signature arxiv.org/abs/2511.19563
Comparison of the photons to the standard model, in the Zeppenfeld variable
This #CMSPaper looks for production of photons in these boson collisions, meaning the LHC is a W boson collider, which is the first time this has ever been seen! It measures properties of the photons produced and compares them to the standard model predictions arxiv.org/abs/2512.00502
distribution of Z bosons and photons.
This #CMSPaper measures the simultaneous production of Z bosons and photons. That way their interactions can be measured and can be compared to predictions by the standard model arxiv.org/abs/2512.08582
Comparison of different (supervised) machine learning searches
One of the classical ways to look for undiscovered particles at the LHC is to look for unexpected resonances in the jets coming from quarks and gluons. This #CMSPaper compares the cutting edge of #machinelearnining #ai methods to see how well they do for top quark resonances arxiv.org/abs/2512.20395
Diphoton invariant mass
This #CMSPaper searches for a heavy particle decaying into pairs of undiscovered light bosons, which in turn decay into photons that can partially overlap. This is technically a difficult signature because overlapping photons are not easy to disentangle arxiv.org/abs/2601.00183
there are some excesses in this analysis by the way, but nothing too exciting yet. Stay tuned, we have a lot more data in hand!
Are there undiscovered charged heavy Higgs bosons? If they are heavier than the top quark, they would decay into a top quark + b quark signature. This #CMSPaper looks for these, and also compares them in dedicated theory frameworks that include neutral heavy Higgs bosons arxiv.org/abs/2512.24471
