CMS Publications#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
Measurement of dijet angular distributions and search for beyond the standard model physics in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
A measurement is presented of dijet angular distributions in proton-proton collisions at $ \sqrt{s} = $ 13 TeV, using data collected with the CMS detector at the CERN LHC and corresponding to an integrated luminosity of 138 fb$ ^{-1} $. For the first time, the dijet angular distributions, corrected for detector effects, are compared with the predictions of perturbative quantum chromodynamics at next-to-next-to-leading order, including next-to-leading-order electroweak corrections. While data are generally found to be in agreement with predictions, a small difference in shape of the normalized distributions is seen for dijet masses ranging from 2.4 to 4.8 TeV and above 6 TeV. The distributions are used to search for proposed signatures of quark compositeness, extra spatial dimensions, quantum black holes, dark-matter mediators, axion-like particles, and anomalous gluon couplings. The most stringent limits to date are set for most of these scenarios. Quark contact interactions are excluded at 95\% confidence level (CL) up to a scale of 17 (37) TeV for destructive (constructive) interference in a benchmark scenario, valid to next-to-leading order in quantum chromodynamics, and in which only left-handed quarks participate. The coupling of axion-like particles to the gluon, $ c_{\text{g}}/f_{\text{a}} $, is constrained to be lower than 0.42$ \text{TeV}^{-1} $ at 95\% CL. The anomalous triple-gluon coupling, $ C_{\text{G}}/\Lambda^2 $, in a standard model effective field theory is constrained to be lower than 0.0076$ \text{TeV}^{-2} $ at 95% CL
#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
Measurement of dijet angular distributions and search for beyond the standard model physics in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
A measurement is presented of dijet angular distributions in proton-proton collisions at $ \sqrt{s} = $ 13 TeV, using data collected with the CMS detector at the CERN LHC and corresponding to an integrated luminosity of 138 fb$ ^{-1} $. For the first time, the dijet angular distributions, corrected for detector effects, are compared with the predictions of perturbative quantum chromodynamics at next-to-next-to-leading order, including next-to-leading-order electroweak corrections. While data are generally found to be in agreement with predictions, a small difference in shape of the normalized distributions is seen for dijet masses ranging from 2.4 to 4.8 TeV and above 6 TeV. The distributions are used to search for proposed signatures of quark compositeness, extra spatial dimensions, quantum black holes, dark-matter mediators, axion-like particles, and anomalous gluon couplings. The most stringent limits to date are set for most of these scenarios. Quark contact interactions are excluded at 95\% confidence level (CL) up to a scale of 17 (37) TeV for destructive (constructive) interference in a benchmark scenario, valid to next-to-leading order in quantum chromodynamics, and in which only left-handed quarks participate. The coupling of axion-like particles to the gluon, $ c_{\text{g}}/f_{\text{a}} $, is constrained to be lower than 0.42$ \text{TeV}^{-1} $ at 95\% CL. The anomalous triple-gluon coupling, $ C_{\text{G}}/\Lambda^2 $, in a standard model effective field theory is constrained to be lower than 0.0076$ \text{TeV}^{-2} $ at 95% CL
#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
Search for new particles decaying into top quark-antiquark pairs in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
A search for new particles decaying to top quark-antiquark pairs is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV. The data set recorded with the CMS detector between 2016 and 2018 is used, corresponding to an integrated luminosity of 138 fb$ ^{-1}$. Final states with 0, 1, and 2 leptons are analyzed, covering all decay modes of the top quark-antiquark pairs. Heavy $ \mathrm{Z}^{'} $ bosons with relative widths of 1, 10, and 30\% are excluded for masses in the ranges 0.4-4.8, 0.4-6.2, and 0.4-7.4 TeV, respectively. A Kaluza-Klein gluon in the Randall-Sundrum model and a dark-matter mediator are excluded for masses between 0.5-5.5 and 1.0-4.2 TeV, respectively. These results set the most stringent limits to date for the considered models in the $ \mathrm{t} \overline{\mathrm{t}} $ final state. In addition, in the two-Higgs-doublet models, upper limits are set on the coupling strength modifier for scalar and pseudoscalar Higgs bosons with relative widths of 2.5, 10, and 25\% in the mass range of 0.5-1.0 TeV.
#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
Search for low-mass vector and scalar resonances decaying into a quark-antiquark pair in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
A search for resonances with masses from 50 to 300 GeV decaying into a quark-antiquark pair is presented. The search uses proton-proton collision data at $ \sqrt{s}= $ 13 TeV collected by the CMS experiment at the CERN LHC in 2016--2018, corresponding to an integrated luminosity of 138 fb$ ^{-1} $. Two coupling scenarios are considered, with the resonances coupled either equally to all flavors of quarks or preferentially to bottom quarks. The search targets resonances produced in association with hard initial-state radiation, resulting in a large-radius jet with a two-pronged substructure. The PARTICLENET algorithm is used to distinguish resonance decays to bottom quark pairs from lighter quark pairs and to suppress background processes. The invariant jet mass spectrum is scrutinized for peaking excesses over a falling background. No evidence for such resonances is observed. Limits are set on the couplings of new scalar and vector resonances to quarks, representing the most stringent limits to date in the mass range of 50--250 GeV.
#CMSPAS: Search for s-channel production of tau-enriched semivisible jets in proton-proton collisions at 13 TeV (CMS-PAS-EXO-26-005) https://cds.cern.ch/record/2957566 #Moriond #NewPhysics
#CMSPAS: Search for long-lived heavy neutral leptons in proton-proton collisions with one prompt muon and a secondary vertex from two displaced muons (CMS-PAS-EXO-24-015) https://cds.cern.ch/record/2957522 #Moriond #NewPhysics
#CMSPAS: Search for dark matter produced in association with a boosted large-radius jet in proton-proton collisions at √s = 13 TeV (CMS-PAS-EXO-24-001) https://cds.cern.ch/record/2957427 #Moriond #NewPhysics
#CMSPAS: Search for resonant and nonresonant production of pairs of dijet resonances with b jets in the final state in proton-proton collisions at √s = 13 TeV (CMS-PAS-EXO-24-039) https://cds.cern.ch/record/2957052 #NewPhysics
#CMSPAS: Search for new charged gauge bosons in the e/μ + p_T^miss channel using pp collisions at √s = 13.6 TeV (CMS-PAS-EXO-24-021) https://cds.cern.ch/record/2957051 #NewPhysics