Mastodawn

#CMSPAS: Measurements of inclusive and differential cross sections for Higgs boson production with decay to four leptons in proton-proton collisions at 13.6 TeV (CMS-PAS-HIG-25-015) https://cds.cern.ch/record/2958220 #Moriond #HiggsBoson

Measurements of inclusive and differential cross sections for Higgs boson production with decay to four leptons in proton-proton collisions at 13.6 TeV

Measurements of Higgs boson ($\mathrm{H}$) production cross sections in the four-lepton ($4\ell, \ell=\mathrm{e},\mu$) final state at a center-of-mass energy $\sqrt{s}=13.6\,\mathrm{TeV}$ are presented. These measurements are based on data collected with the CMS detector at the CERN LHC between 2022 and 2024, corresponding to an integrated luminosity of $171\,\mathrm{fb}^{-1}$. Cross sections are measured in a fiducial region closely matching the experimental acceptance, both inclusively and differentially, as a function of a range of observables. Dedicated measurements targeting the production of the Higgs boson via vector boson fusion are also performed. The $\mathrm{H}\to\mathrm{ZZ}\to 4\ell$ inclusive fiducial cross section is measured to be $\sigma_\mathrm{fid} = 3.11^{+0.22}_{-0.22}(\mathrm{stat.})^{+0.14}_{-0.12}(\mathrm{syst.})\, \mathrm{fb}$, in agreement with the standard model expectation of $3.05^{+0.17}_{-0.22}\, \mathrm{fb}$.

CERN Document Server

CMS Publications 4d ago

#CMSpaper: Search for Higgs boson production at high transverse momentum in the WW decay channel in proton-proton collisions at √s = 13 TeV (arXiv:2603.22233) https://arxiv.org/abs/2603.22233 #HiggsBoson

Search for Higgs boson production at high transverse momentum in the WW decay channel in proton-proton collisions at $\sqrt{s}$ = 13 TeV

A search for Higgs boson (\PH) production at high transverse momentum ($p_\mathrm{T}$) in the WW decay channel is presented. The analysis uses proton-proton collisions at $\sqrt{s}$ = 13 TeV recorded by the CMS experiment in 2016$-$2018, corresponding to an integrated luminosity of 138 fb$^{-1}$. The visible decay products of the Higgs boson are reconstructed as a single large-radius jet with one isolated lepton or none (1$\ell$ and 0$\ell$, respectively; $\ell$ = e, $μ$). The \PH-candidate jets are identified using an advanced transformer-based algorithm and are calibrated with the Lund jet plane reweighting technique. The 1$\ell$ channel is further split into gluon fusion, vector boson fusion, and associated production with hadronically decaying vector boson categories, while the 0$\ell$ channel considers all production processes inclusively. The measured cross section times the H $\to$ WW branching fraction relative to the standard model expectation is $μ$ = $-$0.19$^{+0.48}_{-0.46}$, indicating no evidence of a signal above the background. This measurement represents the first dedicated study of highly Lorentz-boosted H $\to$ WW decays, complementing earlier searches for high-$p_\mathrm{T}$ Higgs boson in other decay channels.

arXiv.org

CMS Publications 5d ago

#CMSpaper soon on arXiv: Search for Higgs boson production at high transverse momentum in the WW decay channel in proton-proton collisions at √s = 13 TeV (CERN-EP-2026-033) https://cds.cern.ch/record/2957732 #HiggsBoson

Search for Higgs boson production at high transverse momentum in the WW decay channel in proton-proton collisions at $ \sqrt{s} = $ 13 TeV

A search for Higgs boson (H) production at high transverse momentum ($ p_{\mathrm{T}} $) in the WW decay channel is presented. The analysis uses proton-proton collisions at $ \sqrt{s}= $ 13 TeV recorded by the CMS experiment in 2016--2018, corresponding to an integrated luminosity of 138 fb$ ^{-1} $. The visible decay products of the Higgs boson are reconstructed as a single large-radius jet with one isolated lepton or none (1 $ \ell $ and 0 $ \ell $, respectively; $ \ell=\mathrm{e},\mu $). The H-candidate jets are identified using an advanced transformer-based algorithm and are calibrated with the Lund jet plane reweighting technique. The 1 $ \ell $ channel is further split into gluon fusion, vector boson fusion, and associated production with hadronically decaying vector boson categories, while the 0 $ \ell $ channel considers all production processes inclusively. The measured cross section times the $ \mathrm{H} \to \mathrm{W} \mathrm{W} $ branching fraction relative to the standard model expectation is $ \mu = - $ 0.19 $ ^{+0.48}_{-0.46} $, indicating no evidence of a signal above the background. This measurement represents the first dedicated study of highly Lorentz-boosted $ \mathrm{H} \to \mathrm{W} \mathrm{W} $ decays, complementing earlier searches for high-$ p_{\mathrm{T}} $ Higgs boson in other decay channels.

CERN Document Server

CMS Publications Mar 23

#CMSPAS: Analysis of the CP structure of the Yukawa coupling between the Higgs boson and tau leptons in proton-proton collisions at 13.6 TeV (CMS-PAS-HIG-25-012) https://cds.cern.ch/record/2957342 #Moriond #HiggsBoson

CMS Publications Mar 20

#CMSPAS: A measurement of the Higgs boson mass in the diphoton decay channel with the CMS detector (CMS-PAS-HIG-24-007) https://cds.cern.ch/record/2957193 #HiggsBoson

CMS Publications Mar 12

#CMSpaper: Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at √s = 13 TeV (arXiv:2603.03250) https://arxiv.org/abs/2603.03250 #HiggsBoson

Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The existence of a new spin-zero particle with a mass below the electroweak scale is predicted by several theoretical models. Searches for resonant production of photon pairs at the LHC are able to probe these models. We present a search for a narrow resonance produced through gluon fusion that decays into a pair of photons with an invariant mass between 10 and 70 GeV, using a proton-proton collision data set from the CMS experiment. This data set, corresponding to an integrated luminosity of 54.4 fb$^{-1}$, was recorded in 2018 at a center-of-mass energy of 13 TeV using a newly introduced diphoton trigger that enabled exploration of the low-mass diphoton spectrum. No significant excess above the expected background is observed. Upper limits are set on the product of the gluon fusion production cross section and the branching fraction of the diphoton decay of a narrow resonance. An interpretation of these limits within an effective field theory framework for axion-like particles is also provided.

arXiv.org

CMS Publications Mar 9

#CMSpaper soon on arXiv: Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at √s = 13 TeV (CERN-EP-2026-007) https://cds.cern.ch/record/2956165 #HiggsBoson

Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at $ \sqrt{s} = $ 13 TeV

The existence of a new spin-zero particle with a mass below the electroweak scale is predicted by several theoretical models. Searches for resonant production of photon pairs at the LHC are able to probe these models. We present a search for a narrow resonance produced through gluon fusion that decays into a pair of photons with an invariant mass between 10 and 70 GeV, using a proton-proton collision data set from the CMS experiment. This data set, corresponding to an integrated luminosity of 54.4 fb$ ^{-1} $, was recorded in 2018 at a center-of-mass energy of 13 TeV using a newly introduced diphoton trigger that enabled exploration of the low-mass diphoton spectrum. No significant excess above the expected background is observed. Upper limits are set on the product of the gluon fusion production cross section and the branching fraction of the diphoton decay of a narrow resonance. An interpretation of these limits within an effective field theory framework for axion-like particles is also provided.

CERN Document Server

j43147 :pentagram:Mar 9

Why some Evil treasures their little sunshine? It's like a luxury car, having one is a status symbol and you wouldn't want a scratch on it and you want it to be shiny and clean at all times. Real little sunshines are hard to come by. This is what a little sunshine looks like.
A luxury car is a nice thing, some Evil does like nice things.
#callmelittlesunshine #higgsboson

CMS Publications Feb 25

#CMSpaper: Combined measurements and interpretations of Higgs boson production and decay in proton-proton collisions at √s = 13 TeV (arXiv:2602.18611) https://arxiv.org/abs/2602.18611 #HiggsBoson

Combined measurements and interpretations of Higgs boson production and decay in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Combined measurements of Higgs boson production and decay rates are reported, representing the most comprehensive study performed by the CMS Collaboration to date. The included analyses use proton-proton collision data recorded by the CMS experiment at $\sqrt{s}$ = 13 TeV from 2016 to 2018, corresponding to an integrated luminosity of 138 fb$^{-1}$. The statistical combination is based on analyses that measure the following decay channels: H $\to$ $γγ$, H $\to$ ZZ, H $\to$ WW, H $\to$ $ττ$, H $\to$ bb, H $\to$ $μμ$, and H $\to$ Z$γ$ $\to$ $\ell\ellγ$ ($\ell$ = e,$μ$). Information in the events from each decay channel is used to target multiple Higgs boson production processes. Searches for invisible Higgs boson decays are also considered, as well as an analysis that measures off-shell Higgs boson production in the H $\to$ ZZ $\to$ 4$\ell$ decay channel. The best fit inclusive signal yield is measured to be 1.014$^{+0.055}_{-0.053}$ times the standard model expectation, for a Higgs boson mass of 125.38 GeV. Measurements in kinematic regions defined by the simplified template cross section framework are also provided, as well as interpretations in the coupling modifier and standard model effective field theory frameworks. The coupling modifier interpretation is further used to place constraints on various two-Higgs-doublet models. The results show good compatibility with the standard model predictions for the majority of the measured parameters.

arXiv.org

CMS Publications Feb 24

#CMSpaper soon on arXiv: Combined measurements and interpretations of Higgs boson production and decay in proton-proton collisions at √s = 13 TeV (CERN-EP-2026-009) https://cds.cern.ch/record/2955243 #HiggsBoson

Combined measurements and interpretations of Higgs boson production and decay in proton-proton collisions at $ \sqrt{s}= $ 13 TeV

Combined measurements of Higgs boson production and decay rates are reported, representing the most comprehensive study performed by the CMS Collaboration to date. The included analyses use proton-proton collision data recorded by the CMS experiment at $ \sqrt{s}=13 \text{TeV} $ from 2016 to 2018, corresponding to an integrated luminosity of 138 fb$^{-1}$. The statistical combination is based on analyses that measure the following decay channels: $ \mathrm{H}\to\gamma\gamma $, $ \mathrm{H}\to\mathrm{Z}\mathrm{Z} $, $ \mathrm{H}\to\mathrm{W}\mathrm{W} $, $ \mathrm{H}\to\tau\tau $, $ \mathrm{H}\to\mathrm{b}\mathrm{b} $, $ \mathrm{H}\to\mu\mu $, and $ \mathrm{H}\to\mathrm{Z}\gamma\to\ell\ell\gamma $ ($ \ell=\mathrm{e},\mu $). Information in the events from each decay channel is used to target multiple Higgs boson production processes. Searches for invisible Higgs boson decays are also considered, as well as an analysis that measures off-shell Higgs boson production in the $ \mathrm{H}\to\mathrm{Z}\mathrm{Z}\to4\ell $ decay channel. The best fit inclusive signal yield is measured to be 1.014 $ ^{+0.055}_{-0.053} $ times the standard model expectation, for a Higgs boson mass of 125.38 GeV. Measurements in kinematic regions defined by the simplified template cross section framework are also provided, as well as interpretations in the coupling modifier and standard model effective field theory frameworks. The coupling modifier interpretation is further used to place constraints on various two-Higgs-doublet models. The results show good compatibility with the standard model predictions for the majority of the measured parameters.

CERN Document Server