#CMSpaper soon on arXiv: Proton reconstruction with the TOTEM Roman pot detectors for high-β* LHC data (CERN-EP-2024-273)
https://cds.cern.ch/record/2918374 #StandardModel 
Proton reconstruction with the TOTEM Roman pot detectors for high-$ \beta^* $ LHC data
The TOTEM Roman pot detectors are used to reconstruct the transverse momentum of scattered protons and to estimate the transverse location of the primary interaction. This paper presents new methods of track reconstruction, measurements of strip-level detection efficiencies, cross-checks of the LHC beam optics, and detector alignment techniques, along with their application in the selection of signal collision events. The track reconstruction is performed by exploiting hit cluster information through a novel method using a common polygonal area in the intercept-slope plane. The technique is applied in the relative alignment of detector layers with $\mu$m precision. A tag-and-probe method is used to extract strip-level detection efficiencies. The alignment of the Roman pot system is performed through time-dependent adjustments, resulting in a position accuracy of 3 $\mu$m in the horizontal and 60 $\mu$m in the vertical directions. The goal is to provide an optimal reconstruction tool for central exclusive physics analyses based on the high-$ \beta^* $ data-taking period at $ \sqrt{s}= $ 13 TeV in 2018.
#CMSpaper: Constraints on standard model effective field theory for a Higgs boson produced in association with W or Z bosons in the H → bb decay channel in proton-proton collisions at √s = 13 TeV (arXiv:2411.16907)
https://arxiv.org/abs/2411.16907 #HiggsBoson 
Constraints on standard model effective field theory for a Higgs boson produced in association with W or Z bosons in the H $\to\mathrm{b\bar{b}}$ decay channel in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A standard model effective field theory (SMEFT) analysis with dimension-six operators probing nonresonant new physics effects is performed in the Higgs-strahlung process, where the Higgs boson is produced in association with a W or Z boson, in proton-proton collisions at a center-of-mass energy of 13 TeV. The final states in which the W or Z boson decays leptonically and the Higgs boson decays to a pair of bottom quarks are considered. The analyzed data were collected by the CMS experiment between 2016 and 2018 and correspond to an integrated luminosity of 138 fb$^{-1}$. An approach designed to simultaneously optimize the sensitivity to Wilson coefficients of multiple SMEFT operators is employed. Likelihood scans as functions of the Wilson coefficients that carry SMEFT sensitivity in this final state are performed for different expansions in SMEFT. The results are consistent with the predictions of the standard model.
#CMSpaper: Constraints on standard model effective field theory for a Higgs boson produced in association with W or Z bosons in the H → bb decay channel in proton-proton collisions at √s = 13 TeV (arXiv:2411.16907)
https://arxiv.org/abs/2411.16907 #HiggsBoson Constraints on standard model effective field theory for a Higgs boson produced in association with W or Z bosons in the H $\to\mathrm{b\bar{b}}$ decay channel in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A standard model effective field theory (SMEFT) analysis with dimension-six operators probing nonresonant new physics effects is performed in the Higgs-strahlung process, where the Higgs boson is produced in association with a W or Z boson, in proton-proton collisions at a center-of-mass energy of 13 TeV. The final states in which the W or Z boson decays leptonically and the Higgs boson decays to a pair of bottom quarks are considered. The analyzed data were collected by the CMS experiment between 2016 and 2018 and correspond to an integrated luminosity of 138 fb$^{-1}$. An approach designed to simultaneously optimize the sensitivity to Wilson coefficients of multiple SMEFT operators is employed. Likelihood scans as functions of the Wilson coefficients that carry SMEFT sensitivity in this final state are performed for different expansions in SMEFT. The results are consistent with the predictions of the standard model.
#CMSpaper: Search for rare decays of the Z and Higgs bosons to a J/ψ or ψ(2S) meson and a photon in proton-proton collisions at √s = 13 TeV (arXiv:2411.15000)
https://arxiv.org/abs/2411.15000 #StandardModel Search for rare decays of the Z and Higgs bosons to a J/$ψ$ or $ψ$(2S) meson and a photon in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A search is presented for rare decays of the Z and Higgs bosons to a photon and a J/$ψ$ or a $ψ$(2S) meson, with the charmonium state subsequentially decaying to a pair of muons. The data set corresponds to an integrated luminosity of 123 fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of 13 TeV collected with the CMS detector at the LHC. No evidence for branching fractions of these rare decay channels larger than predicted in the standard model is observed. Upper limits at 95% confidence level are set: $\mathcal{B}$(H $\to$ J/$ψγ$) $\lt$ 2.6 $\times$ 10$^{-4}$, $\mathcal{B}$(H $\to$ $ψ$(2S)$γ$) $\lt$ 9.9 $\times$ 10$^{-4}$, $\mathcal{B}$(Z $\to$ J/$ψγ$) $\lt$ 0.6 $\times$ 10$^{-6}$, and $\mathcal{B}$(Z $\to$ $ψ$(2S)$γ$) $\lt$ 1.3 $\times$ 10$^{-6}$. The ratio of the Higgs boson coupling modifiers $κ_\mathrm{c} / κ_γ$ is constrained to be in the interval ($-$157, $+$199) at 95% confidence level. Assuming $κ_γ= 1$, this interval becomes ($-$166, $+$208).
#CMSpaper: Search for rare decays of the Z and Higgs bosons to a J/ψ or ψ(2S) meson and a photon in proton-proton collisions at √s = 13 TeV (CMS-SMP-22-012)
https://cds.cern.ch/record/2917845 #StandardModel 
Search for rare decays of the Z and Higgs bosons to a $ \mathrm{J}/\psi $ or $\psi(2\text{S})$ meson and a photon in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
A search is presented for rare decays of the Z and Higgs bosons to a photon and a $ \mathrm{J}/\psi $ or a $\psi(2\text{S})$ meson, with the charmonium state subsequentially decaying to a pair of muons. The data set corresponds to an integrated luminosity of 123 fb$ ^{-1} $ of proton-proton collisions at a center-of-mass energy of 13 TeV collected with the CMS detector at the LHC. No evidence for branching fractions of these rare decay channels larger than predicted in the standard model is observed. Upper limits at 95% confidence level are set: $ \mathcal{B}(\mathrm{H}\to\mathrm{J}/\psi\gamma) < $ 2.6 $\times$ 10$^{-4} $, $ \mathcal{B}(\mathrm{H}\to\psi(2\text{S})\gamma) < $ 9.9 $\times$ 10$^{-4} $, $ \mathcal{B}(\mathrm{Z}\to\mathrm{J}/\psi\gamma) < $ 0.6 $\times$ 10$^{-6} $, and $ \mathcal{B}(\mathrm{Z}\to\psi(2\text{S})\gamma) < $ 1.3 $\times$ 10$^{-6} $. The ratio of the Higgs boson coupling modifiers $ \kappa_{\mathrm{c}}/\kappa_{\gamma} $ is constrained to be in the interval ($-$157, $+$199) at 95% confidence level. Assuming $ \kappa_{\gamma}= $ 1, this interval becomes ($-$166, $+$208).
#CMSpaper soon on arXiv: Constraints on standard model effective field theory for a Higgs boson produced in association with W or Z bosons in the H → bb decay channel in proton-proton collisions at √s = 13 TeV (CERN-EP-2024-294)
https://cds.cern.ch/record/2917953 #HiggsBoson Constraints on standard model effective field theory for a Higgs boson produced in association with W or Z bosons in the H $ \to \mathrm{b}\overline{\mathrm{b}} $ decay channel in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
A standard model effective field theory (SMEFT) analysis with dimension-six operators probing nonresonant new physics effects is performed in the Higgs-strahlung process, where the Higgs boson is produced in association with a W or Z boson, in proton-proton collisions at a center-of-mass energy of 13 TeV. The final states in which the W or Z boson decays leptonically and the Higgs boson decays to a pair of bottom quarks are considered. The analyzed data were collected by the CMS experiment between 2016 and 2018 and correspond to an integrated luminosity of 138 fb$ ^{-1} $. An approach designed to simultaneously optimize the sensitivity to Wilson coefficients of multiple SMEFT operators is employed. Likelihood scans as functions of the Wilson coefficients that carry SMEFT sensitivity in this final state are performed for different expansions in SMEFT. The results are consistent with the predictions of the standard model.
#CMSpaper soon on arXiv: Search for rare decays of the Z and Higgs bosons to a J/ψ or ψ(2S) meson and a photon in proton-proton collisions at √s = 13 TeV (CERN-EP-2024-253)
https://cds.cern.ch/record/2917845 #StandardModel Search for rare decays of the Z and Higgs bosons to a $ \mathrm{J}/\psi $ or $\psi(2\text{S})$ meson and a photon in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
A search is presented for rare decays of the Z and Higgs bosons to a photon and a $ \mathrm{J}/\psi $ or a $\psi(2\text{S})$ meson, with the charmonium state subsequentially decaying to a pair of muons. The data set corresponds to an integrated luminosity of 123 fb$ ^{-1} $ of proton-proton collisions at a center-of-mass energy of 13 TeV collected with the CMS detector at the LHC. No evidence for branching fractions of these rare decay channels larger than predicted in the standard model is observed. Upper limits at 95% confidence level are set: $ \mathcal{B}(\mathrm{H}\to\mathrm{J}/\psi\gamma) < $ 2.6 $\times$ 10$^{-4} $, $ \mathcal{B}(\mathrm{H}\to\psi(2\text{S})\gamma) < $ 9.9 $\times$ 10$^{-4} $, $ \mathcal{B}(\mathrm{Z}\to\mathrm{J}/\psi\gamma) < $ 0.6 $\times$ 10$^{-6} $, and $ \mathcal{B}(\mathrm{Z}\to\psi(2\text{S})\gamma) < $ 1.3 $\times$ 10$^{-6} $. The ratio of the Higgs boson coupling modifiers $ \kappa_{\mathrm{c}}/\kappa_{\gamma} $ is constrained to be in the interval ($-$157, $+$199) at 95% confidence level. Assuming $ \kappa_{\gamma}= $ 1, this interval becomes ($-$166, $+$208).
#CMSPAS: Constraining nPDFs using dijet production in pPb collisions at 8.16 TeV with the CMS experiment (CMS-PAS-HIN-24-014)
https://cds.cern.ch/record/2917837 #HeavyIons 
Constraining nPDFs using dijet production in pPb collisions at 8.16 TeV with the CMS experiment
The dijet pseudorapidity ($\eta^{\text{dijet}}$) distribution in proton-lead ($\text{pPb}$) collisions is sensitive to nuclear modifications of parton distribution functions (PDFs). Additionally, the measurement of the $\eta^{\text{dijet}}$ dependence of the average transverse momenta of dijets provides a precise method for investigating the energy scale of partonic interactions and their momentum transfer dependence ($Q^{2}$). Previously published measurements of dijet production in $\text{pPb}$ collisions at a center-of-mass collision energy per nucleon pair of $\sqrt{s_{\mathrm{NN}}}=5.02~\mathrm{TeV}$ were used to constrain nuclear PDF fits based on next-to-leading order calculations. Here, a new measurement of dijet distributions using $\text{pPb}$ collision data collected at a higher energy of $8.16~\mathrm{TeV}$ is reported. The data, recorded by the CMS experiment at the LHC, correspond to an integrated luminosity of $174.6~\mathrm{nb}^{-1}$. The $\eta^{\text{dijet}}$ distributions are measured for multiple dijet average transverse momentum $p_{\text{T}}^{\text{ave}}$ intervals from $50$ to $500~\mathrm{GeV}$.
#CMSpaper: Angular analysis of the B⁰ → K*⁰(892) μ⁺μ⁻ decay in proton-proton collisions at √s = 13 TeV (arXiv:2411.11820)
https://arxiv.org/abs/2411.11820 #BPhysics Angular analysis of the B$^0$ $\to$ K$^*$(892)$^0μ^+μ^-$ decay in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A full set of optimized observables is measured in an angular analysis of the decay B$^0$ $\to$ K$^*$(892)$^0μ^+μ^-$ using a sample of proton-proton collisions at $\sqrt{s}$ = 13 TeV, collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 140 fb$^{-1}$. The analysis is performed in six bins of the squared invariant mass of the dimuon system, $q^2$, over the range 1.1 $\lt$ $q^2$ $\lt$ 16 GeV$^2$. The results are among the most precise experimental measurements of the angular observables for this decay and are compared to a variety of predictions based on the standard model. Some of these predictions exhibit tension with the measurements.
#CMSpaper soon on arXiv: Angular analysis of the B⁰ → K*⁰(892) μ⁺μ⁻ decay in proton-proton collisions at √s = 13 TeV (CERN-EP-2024-268)
https://cds.cern.ch/record/2917421 #BPhysics Angular analysis of the $ {\mathrm{B}^0}\to \mathrm{ K^*(892)^0 } \mu^{+}\mu^{-} $ decay in proton-proton collisions at $ \sqrt{s}= $ 13 TeV
A full set of optimized observables is measured in an angular analysis of the decay $ {\mathrm{B}^0}\to \mathrm{ K^*(892)^0 } \mu^{+}\mu^{-} $ using a sample of proton-proton collisions at $ \sqrt{s}= $ 13 TeV, collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 140 fb$ ^{-1} $. The analysis is performed in six bins of the squared invariant mass of the dimuon system, $ q^{2} $, over the range 1.1 $ < q^{2} < $ 16 GeV$^2 $. The results are among the most precise experimental measurements of the angular observables for this decay and are compared to a variety of predictions based on the standard model.
