#CMSPaper even shorter:

We do not see any new Z bosons made together with b quarks that could explain the anomalies in the same signature seen by LHCb and similar flavour experiments #scientificMethod #nullresult

https://sciencemastodon.com/@freyablekman/110796775448819736

#CMSPaper 1218: Are there bumps in the jet-photon spectrum? This would happen if there are quarks that are not elementary, new undiscovered quarks, or if microscopic #BlackHoles were produced. We in the @CMSexperiment don't see any in the 2016 through 2018 (Run2) LHC data.

https://arxiv.org/abs/2305.07998
#particlePhysics #nullResult #physics #CERN #science #fundamentalscience #datascience

#CMSPaper 1215: The signature of a particle with spin 1 that decays to a top quark and unidentifiable particles is a really important benchmark signature to check at the LHC, in this case taken from #Supersymmetry. And top quarks can also decay to tau leptons, and new physics could change that fraction. This paper contains the most sensitive ever analysis of these tau+missing momentum+b quark signatures, but it is still a #NullResult http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-21-004/index.html @CMSexperiment #CERN #particlephysics

#CMSPaper 1208: in some extensions of the standard model (particularly where Higgs and top quarks are not really elementary but instead composite) there are heavier particles that can decay to top+Higgs. These particles, which are called "vector-like quarks" even though they're not really like the quarks we know, can come in many signatures. This paper searches for those, top+Higgs resonance where HIggs decays to photons. It's a #nullresult. http://cms-results.web.cern.ch/cms-results/public-results/publications/B2G-21-007/index.html @CMSexperiment #physics #CERN

#CMSPaper 1206: Scalar top quarks (aka squarks) are hypothetical #particles that are partners of the top quark, predicted by #supersymmetry, for example. This #nullresult (we actually see a lot fewer collisions than expected even!) searches for the case where those squarks are lighter than W bosons, meaning they would create signatures with b quarks, a few extra quarks, and missing energy. http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-21-003/index.html #particlephysics @CMSexperiment #physics #cern

#CMSPaper 1203: The W boson is one of the particles that decay to a lepton and its neutrino. But there are more, but all composite particles, pions are an example. And are there undiscovered ones?

This #paper searches for heavy #particles that decay like a W boson to a #tau lepton+its (anti) #neutrino. It is the most sensitive analysis ever made, and a #NullResult that constrains many extensions to the #standard model http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-21-009/index.html #physics #particlephysics #CERN @CMSexperiment

#CMSPaper 1200(!): Are there undiscovered #particles that decay to #Higgs bosons and #Gravitons? That would create a signature that looks like a jet of particles, but #trackless, so without any charged particles. This innovative paper uses #machinelearning to check for such jets in the @CMSexperiment data from 2016-2018 (none are seen, it's a #nullresult http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-21-014/index.html #particlephysics #CERN #searches #physics #datascience

#CMSPaper 1197: TOTEM is the part of @CMSexperiment that sees when protons in LHC collisions don't break apart, but as protons are charged they can still interact via photons 🤓

Selecting such "exclusive collisions" means isolating data where the LHC works as a photon collider.

This paper checks for new particles decaying to W/Z bosons in such exclusive γγ collisions and is sensitive to really high mass particles (none seen, it's a #nullresult) http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-21-014/index.html #physics #CERN #science

#CMSPaper 1195: #Supersymmetry is a useful benchmark to look for signatures of new undiscovered #particles that are invisible in our detector. This #nullresult looks for supersymmetry using angles between many (top) quarks, in very busy collisions.

The figure shows the quality of the background prediction as a function of number of jets, high multiplicities are difficult! (1 means no corrections are needed, small error bars/bands mean well understood) http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-21-007/index.html #physics #CERN