This content will become publicly available on April 1, 2022

Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at $$\sqrt{s} = 13\,\text {TeV}$$
Abstract The rate for Higgs ( $${\mathrm{H}}$$ H ) bosons production in association with either one ( $${\mathrm{t}} {\mathrm{H}}$$ t H ) or two ( $${\mathrm{t}} {{\overline{{{\mathrm{t}}}}}} {\mathrm{H}}$$ t t ¯ H ) top quarks is measured in final states containing multiple electrons, muons, or tau leptons decaying to hadrons and a neutrino, using proton–proton collisions recorded at a center-of-mass energy of $$13\,\text {TeV}$$ 13 TeV by the CMS experiment. The analyzed data correspond to an integrated luminosity of 137 $$\,\text {fb}^{-1}$$ fb - 1 . The analysis is aimed at events that contain $${\mathrm{H}} \rightarrow {\mathrm{W}} {\mathrm{W}}$$ H → W W , $${\mathrm{H}} \rightarrow {\uptau } {\uptau }$$ H → τ τ , or $${\mathrm{H}} \rightarrow {\mathrm{Z}} {\mathrm{Z}}$$ H → Z Z decays and each of the top quark(s) decays either to lepton+jets or all-jet channels. Sensitivity to signal is maximized by including ten signatures in the analysis, depending on the lepton multiplicity. The separation among $${\mathrm{t}} {\mathrm{H}}$$ t H , $${\mathrm{t}} {{\overline{{{\mathrm{t}}}}}} {\mathrm{H}}$$ t t ¯ H , and the backgrounds is enhanced through machine-learning techniques and matrix-element methods. The measured production rates for the $${\mathrm{t}} {{\overline{{{\mathrm{t}}}}}} {\mathrm{H}}$$ more »
Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »
Award ID(s):
Publication Date:
NSF-PAR ID:
10299122
Journal Name:
The European Physical Journal C
Volume:
81
Issue:
4
ISSN:
1434-6044
1. Abstract Production cross sections of the Higgs boson are measured in the $${\mathrm{H}} \rightarrow {\mathrm{Z}} {\mathrm{Z}} \rightarrow 4\ell$$ H → Z Z → 4 ℓ ( $$\ell ={\mathrm{e}},{{{\upmu }}_{\mathrm{}}^{\mathrm{}}}$$ ℓ = e , μ ) decay channel. A data sample of proton–proton collisions at a center-of-mass energy of 13 $$\,\text {Te}\text {V}$$ Te , collected by the CMS detector at the LHC and corresponding to an integrated luminosity of 137 $$\,\text {fb}^{-1}$$ fb - 1 is used. The signal strength modifier $$\mu$$ μ , defined as the ratio of the Higgs boson production rate in the $$4\ellmore » 2. Abstract The production of Z boson pairs in proton–proton ($${\mathrm{p}} {\mathrm{p}} $$p p ) collisions,$${{\mathrm{p}} {\mathrm{p}} \rightarrow ({\mathrm{Z}}/\gamma ^*)({\mathrm{Z}}/\gamma ^*) \rightarrow 2\ell 2\ell '}$$p p → ( Z / γ ∗ ) ( Z / γ ∗ ) → 2 ℓ 2 ℓ ′ , where$${\ell ,\ell ' = {\mathrm{e}}}$$ℓ , ℓ ′ = e or$${{\upmu }}$$μ , is studied at a center-of-mass energy of 13$$\,\text {TeV}$$TeV with the CMS detector at the CERN LHC. The data sample corresponds to an integrated luminosity of 137$$\,\text {fb}^{-1}$$fb - 1more » 3. A bstract A search for standard model Higgs bosons (H) produced with transverse momentum ( p T ) greater than 450 GeV and decaying to bottom quark-antiquark pairs ($$ \mathrm{b}\overline{\mathrm{b}} $$b b ¯ ) is performed using proton-proton collision data collected by the CMS experiment at the LHC at$$ \sqrt{s} $$s = 13 TeV. The data sample corresponds to an integrated luminosity of 137 fb − 1 . The search is inclusive in the Higgs boson production mode. Highly Lorentz-boosted Higgs bosons decaying to$$ \mathrm{b}\overline{\mathrm{b}} $$b b ¯ are reconstructed as single large-radius jets,more » 4. Abstract Inclusive and differential fiducial cross sections of the Higgs boson are measured in the$$H \rightarrow ZZ^{*} \rightarrow 4\ell $$H → Z Z ∗ → 4 ℓ ($$\ell = e,\mu $$ℓ = e , μ ) decay channel. The results are based on proton-proton collision data produced at the Large Hadron Collider at a centre-of-mass energy of 13 TeV and recorded by the ATLAS detector from 2015 to 2018, equivalent to an integrated luminosity of 139$$\hbox {fb}^{-1}$$fb - 1 . The inclusive fiducial cross section for the$$H \rightarrow ZZ^{*} \rightarrow 4\ell $$Hmore » 5. Abstract A measurement of the$$ B_{s}^{0} \rightarrow J/\psi \phi $$B s 0 → J / ψ ϕ decay parameters using$$ 80.5\, \mathrm {fb^{-1}} $$80.5 fb - 1 of integrated luminosity collected with the ATLAS detector from 13$$\text {Te}\text {V}$$Te proton–proton collisions at the LHC is presented. The measured parameters include the CP -violating phase$$\phi _{s} $$ϕ s , the width difference$$ \Delta \Gamma _{s}$$Δ Γ s between the$$B_{s}^{0}$$B s 0 meson mass eigenstates and the average decay width$$ \Gamma _{s} Γ s . The values measured formore »