#CMSpaper: Search for light charged Higgs bosons decaying to charm and strange quarks in tt events in proton-proton collisions at √s = 13 TeV (arXiv:2604.27795)
https://arxiv.org/abs/2604.27795 #NewPhysics 
Search for light charged Higgs bosons decaying to charm and strange quarks in $\mathrm{t\bar{t}}$ events in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A search is presented for a light charged Higgs boson H$^\pm$ in top quark pair production ($\mathrm{t\bar{t}}$), where one of the top quarks decays to an H$^\pm$ and a bottom quark, while the other decays to a W$^\mp$ boson and a bottom quark. The H$^\pm$ is assumed to decay into a charm and a strange quark, whereas the W$^\mp$ boson decays into a charged lepton (electron or muon) and a neutrino. Results are reported based on proton-proton collision data at $\sqrt{s}$ = 13 TeV, corresponding to an integrated luminosity of 138 fb$^{-1}$. The analysis probes H$^\pm$ masses in the range 40 to 160 GeV using the invariant mass spectrum of the two light jets, where light jets are defined as jets that do not satisfy the bottom quark tagging requirement. The observed yield is found to be consistent with standard model predictions. Upper limits are set on the branching fraction $\mathcal{B}$(t $\to$ H$^\pm$ b), with values in the range of 0.07$-$1.12% at 95% confidence level, under the assumption that $\mathcal{B}$(H$^\pm$ $\to$ cs) = 100%. These are the first direct limits on charged Higgs bosons produced in top quark decays for masses between 40 and 50 GeV, and the most stringent limits to date in the 70$-$110 GeV range.
#CMSpaper soon on arXiv: Search for light charged Higgs bosons decaying to charm and strange quarks in tt events in proton-proton collisions at √s = 13 TeV (CERN-EP-2026-081)
https://cds.cern.ch/record/2960485 #NewPhysics 
La planète la plus dense connue : aussi compacte que le plomb et elle déroute les scientifiques !
Une exoplanète à la densité comparable à celle du plomb surprend les scientifiques. Comment se forment ces mondes extrêmes ?
La planète la plus dense connue : aussi compacte que le plomb et elle déroute les scientifiques !
Une exoplanète à la densité comparable à celle du plomb surprend les scientifiques. Comment se forment ces mondes extrêmes ?
#CMSpaper: Search for the single production of vector-like quarks decaying into a W boson and a b quark using single-lepton final states in proton-proton collisions at √s = 13 TeV (arXiv:2604.17564)
https://arxiv.org/abs/2604.17564 #NewPhysics 
Search for the single production of vector-like quarks decaying into a W boson and a b quark using single-lepton final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A search is performed for the single production of a heavy vector-like quark (VLQ), decaying into a W boson and a b quark. The analysis uses proton-proton collision data collected by the CMS experiment at the CERN LHC at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 138 fb$^{-1}$. The search targets events with leptonic W boson decays. The event signature consists of one electron or muon, large transverse momentum imbalance, at least one jet consistent with coming from the fragmentation of a b quark and having large transverse momentum, and at least one jet in the forward region of the detector. No significant excess over the standard model prediction is observed. Upper limits are set at the 95% confidence level on the production cross section of a VLQ and its coupling $κ_\mathrm{W}$ to the standard model sector. For a VLQ decaying exclusively into Wb, the upper limit on $κ_\mathrm{W}$ depends on the VLQ mass and reaches values as low as 0.086 for masses around 1.4 TeV. For $κ_\mathrm{W}$ = 0.2 the lower limit on the VLQ mass is 2.4 TeV. These are the most stringent limits to date on the single production of VLQs decaying into Wb.
Anomalie au CERN : des mesures intrigantes relancent l’idée de “nouvelle physique”, mais le modèle standard tient toujours bon 🧪
sciencepost.fr/une-faille-d... #Space #Science #Innovation #Physics #CERN #ParticlePhysics #LHC #QuantumPhysics #NewPhysics #CosmologyUne
Une "faille" dans les fondations de l'univers : l'anomalie détectée au CERN menace de détruire 50 ans de certitudes scientifiques
En observant la désintégration rarissime d'une particule, les physiciens du CERN ont mesuré un écart statistique impossible à ignorer.
Une "faille" dans les fondations de l'univers : l'anomalie détectée au CERN menace de détruire 50 ans de certitudes scientifiques
En observant la désintégration rarissime d'une particule, les physiciens du CERN ont mesuré un écart statistique impossible à ignorer.
#CMSpaper: Search for heavy resonances decaying into four-lepton final states via light bosons in proton-proton collisions at √s = 13 TeV (arXiv:2604.14236)
https://arxiv.org/abs/2604.14236 #NewPhysics 
Search for heavy resonances decaying into four-lepton final states via light bosons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A search for a resonance heavier than 250 GeV decaying into four leptons via two intermediate bosons is presented. The search uses proton-proton collision data at $\sqrt{s}$ = 13 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 138 fb$^{-1}$. Novel techniques are used to enhance the sensitivity to a collimated pair of dileptons reconstructed as a single merged object, resulting from the decay of an intermediate light boson. No significant excess of data over the background predictions is observed. Upper limits are set on the production cross section for a four-lepton resonance, including the previously unexplored phase space at the LHC with a dilepton mass of 0.4$-$15 GeV.
#CMSpaper soon on arXiv: Search for the single production of vector-like quarks decaying into a W boson and a b quark using single-lepton final states in proton-proton collisions at √s = 13 TeV (CERN-EP-2026-021)
https://cds.cern.ch/record/2959556 #NewPhysics Search for the single production of vector-like quarks decaying into a W boson and a b quark using single-lepton final states in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
A search is performed for the single production of a heavy vector-like quark (VLQ), decaying into a W boson and a b quark. The analysis uses proton-proton collision data collected by the CMS experiment at the CERN LHC at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 138 fb$ ^{-1} $. The search targets events with leptonic W boson decays. The event signature consists of one electron or muon, large transverse momentum imbalance, at least one jet consistent with coming from the fragmentation of a b quark and having large transverse momentum, and at least one jet in the forward region of the detector. No significant excess over the standard model prediction is observed. Upper limits are set at the 95\% confidence level on the production cross section of a VLQ and its coupling $ \kappa_\mathrm{W} $ to the standard model sector. For a VLQ decaying exclusively into $ \mathrm{W}\mathrm{b} $, the upper limit on $ \kappa_\mathrm{W} $ depends on the VLQ mass and reaches values as low as 0.086 for masses around 1.4 TeV. For $ \kappa_\mathrm{W} = $ 0.2 the lower limit on the VLQ mass is 2.4 TeV. These are the most stringent limits to date on the single production of VLQs decaying into $ \mathrm{W}\mathrm{b} $.
#CMSpaper soon on arXiv: Search for heavy resonances decaying into four-lepton final states via light bosons in proton-proton collisions at √s = 13 TeV (CERN-EP-2026-072)
https://cds.cern.ch/record/2959550 #NewPhysics Search for heavy resonances decaying into four-lepton final states via light bosons in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
A search for a resonance heavier than 250 GeV decaying into four leptons via two intermediate bosons is presented. The search uses proton-proton collision data at $ \sqrt{s} = $ 13 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 138 fb$ ^{-1} $. Novel techniques are used to enhance the sensitivity to a collimated pair of dileptons reconstructed as a single merged object, resulting from the decay of an intermediate light boson. No significant excess of data over the background predictions is observed. Upper limits are set on the production cross section for a four-lepton resonance, including the previously unexplored phase space at the LHC with a dilepton mass of 0.4-15 GeV.
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