CMS Publications2d ago
#CMSpaper: Search for dark matter produced in association with a Higgs boson decaying to bottom quarks in proton-proton collisions at √s = 13 TeV (arXiv:2601.11330) https://arxiv.org/abs/2601.11330 #SuperSymmetry
Search for dark matter produced in association with a Higgs boson decaying to bottom quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV

A search for dark matter particles produced in association with a Higgs boson decaying to a bottom quark-antiquark pair in proton-proton collisions at $\sqrt{s}$ = 13 TeV is presented. The data, collected with the CMS detector at the LHC, correspond to an integrated luminosity of 101 fb$^{-1}$. The analysis is performed in exclusive categories targeting both Lorentz-boosted (merged) and resolved b jet pair topologies, covering a wide range of Higgs boson transverse momentum. A statistical combination is made with a previous search using data collected in 2016 and corresponding to an integrated luminosity of 35.9 fb$^{-1}$. The observed data agree with the standard model background predictions. Constraints are placed on models predicting new particles or interactions, such as those in the simplified frameworks of baryonic-Z' and 2HDM+a, where the latter is a type-II two-Higgs-doublet model featuring a heavy pseudoscalar with an additional light pseudoscalar. Upper limits at 95% confidence level are set on the production cross section for these models. For the baryonic-Z' model, Z' boson masses below 2.25 TeV are excluded for a dark matter particle candidate mass of 1 GeV. In the 2HDM+a model, heavy pseudoscalar masses between 850 and 1300 GeV are excluded for a light pseudoscalar mass of 350 GeV.

arXiv.org
CMS Publications4d ago
#CMSpaper soon on arXiv: Search for dark matter produced in association with a Higgs boson decaying to bottom quarks in proton-proton collisions at √s = 13 TeV (CERN-EP-2025-288) https://cds.cern.ch/record/2952598 #SuperSymmetry
Search for dark matter produced in association with a Higgs boson decaying to bottom quarks in proton-proton collisions at $ \sqrt{s} = $ 13 TeV

A search for dark matter particles produced in association with a Higgs boson decaying to a bottom quark-antiquark pair in proton-proton collisions at $ \sqrt{s}= $ 13 TeV is presented. The data, collected with the CMS detector at the LHC, correspond to an integrated luminosity of 101 fb$ ^{-1} $. The analysis is performed in exclusive categories targeting both Lorentz-boosted (merged) and resolved b jet pair topologies, covering a wide range of Higgs boson transverse momentum. A statistical combination is made with a previous search using data collected in 2016 and corresponding to an integrated luminosity of 35.9 fb$ ^{-1} $. The observed data agree with the standard model background predictions. Constraints are placed on models predicting new particles or interactions, such as those in the simplified frameworks of baryonic-$ \mathrm{Z}^{'} $ and 2HDM+$ \mathrm{a} $, where the latter is a type-II two-Higgs-doublet model featuring a heavy pseudoscalar with an additional light pseudoscalar. Upper limits at 95\% confidence level are set on the production cross section for these models. For the baryonic-$ \mathrm{Z}^{'} $ model, $ \mathrm{Z}^{'} $ boson masses below 2.25 TeV are excluded for a dark matter particle candidate mass of 1 GeV. In the 2HDM+$ \mathrm{a} $ model, heavy pseudoscalar masses between 850 and 1300 GeV are excluded for a light pseudoscalar mass of 350 GeV.

CERN Document Server
CMS PublicationsNov 27
#CMSpaper: Search for new physics in the final state with a single photon and large missing transverse momentum in proton-proton collisions at √s = 13 TeV (arXiv:2511.17310) https://arxiv.org/abs/2511.17310 #SuperSymmetry
Search for new physics in the final state with a single photon and large missing transverse momentum in proton-proton collisions at $\sqrt{s}$ = 13 TeV

A search for new physics in events featuring a single photon and missing transverse momentum is presented, using proton-proton $\sqrt{s}$ = 13 TeV collision data corresponding to an integrated luminosity of 101 fb$^{-1}$ collected by the CMS experiment at the CERN LHC between 2017 and 2018. This analysis, combined with a previous study of 36 fb$^{-1}$ of 2016 data (totaling 137 fb$^{-1}$), reveals no significant deviations from standard model expectations. The results are then used to establish 95% confidence level limits on parameters in theoretical models involving dark matter and large extra dimensions. Compared to the 2016-only analysis, this search achieves up to a 14% improvement in exclusion reach for mediator masses in simplified dark matter models, along with 11% and 1% enhancements in the limits on the effective field theory suppression scale and the fundamental Planck scale, respectively. These results are the most stringent constraints on these parameters to date.

arXiv.org
HistoPol (#HP) 🏴 🇺🇸 🏴Nov 6

#Physics #TheoreticalPhysics
*#Supersymmetry*

Wow, if you you are not a physicist, but would still like to learn more about the advances of our understanding about the universe, I recommend the visually supported video by #AlessandroRoussel, theoretical physicist and applied mathematician.

You will learn about bosons, string theory, and the like in an entertaining way.

#Edutainment

https://www.youtube.com/watch?v=NfTmy1ApCvI

Entropy and the Arrow of Time

YouTube
CMS PublicationsOct 16
#CMSpaper: Search for dark matter production in association with bottom quarks and a lepton pair in proton-proton collisions at √s = 13 TeV (arXiv:2510.12396) https://arxiv.org/abs/2510.12396 #SuperSymmetry
CMS PublicationsOct 14
#CMSpaper soon on arXiv: Search for dark matter production in association with bottom quarks and a lepton pair in proton-proton collisions at √s = 13 TeV (CERN-EP-2025-119) https://cds.cern.ch/record/2945854 #SuperSymmetry
Search for dark matter production in association with bottom quarks and a lepton pair in proton-proton collisions at $ \sqrt{s}= $ 13 TeV

A search is performed for dark matter produced in association with bottom quarks and a pair of electrons or muons in data collected with the CMS detector at the LHC, corresponding to 138 fb$ ^{-1} $ of integrated luminosity of proton-proton collisions at a center-of-mass energy of 13 TeV. For the first time at the LHC, the associated production of a bottom quark-antiquark pair and a new heavy neutral Higgs boson (H) that subsequently decays into a leptonically decaying Z boson and a pseudoscalar (a) is explored. The latter acts as a dark matter mediator in the context of the two Higgs doublet model plus a pseudoscalar (2HDM+a). Multivariate techniques that target a wide range of mass configurations for the H and a particles are used. The observations are consistent with the expectations from standard model processes. Upper limits at 95% confidence level are set on the product of cross section and branching fraction of the new particles, ranging from 10$^{-2} $ pb for an H mass of 400 GeV to 10$^{-3} $ pb for an H mass of 2000 GeV. Constraints on the parameter space of a benchmark 2HDM+a model are derived and compared with expectations in the context of cosmological predictions.

CERN Document Server
CMS PublicationsAug 21
#CMSpaper: A general search for supersymmetric particles in scenarios with compressed mass spectra using proton-proton collisions at √s = 13 TeV (arXiv:2508.13900) https://arxiv.org/abs/2508.13900 #SuperSymmetry
CMS PublicationsAug 20
#CMSpaper soon on arXiv: A general search for supersymmetric particles in scenarios with compressed mass spectra using proton-proton collisions at √s = 13 TeV (CERN-EP-2025-154) https://cds.cern.ch/record/2940529 #SuperSymmetry
A general search for supersymmetric particles in scenarios with compressed mass spectra using proton-proton collisions at $ \sqrt{s}= $ 13 TeV

A general search is presented for supersymmetric particles (sparticles) in scenarios featuring compressed mass spectra using proton-proton collisions at a center-of-mass energy of 13 TeV, recorded with the CMS detector at the LHC. The analyzed data sample corresponds to an integrated luminosity of 138 fb$ ^{-1} $. A wide range of potential sparticle signatures are targeted, including pair production of electroweakinos, sleptons, and top squarks. The search focuses on events with a high transverse momentum system from initial-state-radiation jets recoiling against a potential sparticle system with significant missing transverse momentum. Events are categorized based on their lepton multiplicity, jet multiplicity, number of b-tagged jets, and kinematic variables sensitive to the sparticle masses and mass splittings. The sensitivity extends to higher parent sparticle masses than previously probed at the LHC for production of pairs of electroweakinos, sleptons, and top squarks with mass spectra featuring small mass splittings (compressed mass spectra). The observed results demonstrate agreement with the predictions of the background-only model. Lower mass limits are set at 95% confidence level on production of pairs of electroweakinos, sleptons, and top squarks that extend to 325, 275, and 780 GeV, respectively, for the most favorable compressed mass regime cases.

CERN Document Server
CMS PublicationsAug 14
#CMSPAS: Search for Dark Matter Produced in Association with a Resonant Bottom-Quark Pair (CMS-PAS-SUS-23-013) https://cds.cern.ch/record/2940270 #SuperSymmetry
CMS PublicationsAug 13
#CMSpaper: Search for light pseudoscalar boson pairs produced from Higgs boson decays using the 4τ and 2μ2τ final states in proton-proton collisions at √s = 13 TeV (arXiv:2508.06947) https://arxiv.org/abs/2508.06947 #SuperSymmetry