Sitian Qian

Search for associated production of a Higgs boson and two vector bosons via vector boson scattering at $\sqrt{s}$ = 13 TeV

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, W. Adam et autres

A search for Higgs boson (H) production in association with two vector bosons (V = W, Z) via vector boson scattering (VBS) is presented using proton-proton collision data collected at $\sqrt{s}$ = 13 TeV by the CMS experiment, corresponding to an integrated …

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Observation of the rare decay $η$$\to$$μ^+μ^-$e$^+$e$^-$

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, W. Adam et autres

A first observation of the rare decay $η$ $\to$ $μ^+μ^-$e$^+$e$^-$ is reported by the CMS Collaboration at the CERN LHC. The result is based on a proton-proton collision data sample at $\sqrt{s}$ = 13.6 TeV corresponding to an integrated luminosity of 38.0 …

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Highly boosted dielectron identification in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, W. Adam et autres

A new technique is developed to identify dielectrons (e$^+$e$^-$) with Lorentz boost $γ_\mathrm{L}$$\gt$ 20 that produce one single merged cluster in the electromagnetic calorimeter of the CMS detector. The identification uses two multivariate models: one for the case where both electron tracks …

Simultaneous measurements of $N$-subjettiness observables in jets from gluons and light-flavour quarks, and in decays of boosted W bosons and top quarks

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, W. Adam et autres

A simultaneous measurement of 25 substructure observables is presented using large-radius jets with high transverse momentum from proton-proton collisions at $\sqrt{s}$ = 13 TeV. The measurement is carried out on dijet events and $\mathrm{t\bar{t}}$ events enriched in Lorentz-boosted W bosons and top …

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Measurement of the Z $\to$$μ^+μ^-$ angular coefficients in pp collisions at $\sqrt{s}$ = 13 TeV as functions of transverse momentum and rapidity

Arzunik Gevorgyan, Aram Hayrapetyan, В. Макаренко, A. Tumasyan et autres

A measurement of the eight angular polarization coefficients, $A_0$ to $A_7$, in the cross section for the Drell$-$Yan production of two muons is presented. The analysis is based on proton-proton (pp) collision data recorded with the CMS detector at the LHC at …

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Search for low-mass resonances decaying to $ττ$ and measurement of the $Υ$$\to$$ττ$ decay in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, W. Adam et autres

An inclusive search is presented for spin-zero bosons decaying to $ττ$ in a previously unexplored mass range between 20 and 60 GeV using proton-proton collision data at $\sqrt{s}$ = 13.6 TeV, corresponding to an integrated luminosity of 61.9 fb$^{-1}$ recorded by CMS …

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Measurement of the top quark pair production cross section in PbPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.36 TeV

Andrey V. Belyaev, Arzunik Gevorgyan, Aram Hayrapetyan, A. Tumasyan et autres

The inclusive cross section for top quark pair ($\mathrm{t\bar{t}}$) production in lead-lead (PbPb) collisions is reported for the first time at a center-of-mass energy per nucleon pair of 5.36 TeV. The analysis uses data corresponding to an integrated luminosity of 1.58 nb$^{-1}$ …

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Search for electroweakinos in compressed-spectrum scenarios with low-momentum isolated tracks in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, W. Adam et autres

A search for supersymmetric electroweakinos is performed using events with a low-momentum (soft) isolated track and large missing transverse momentum, targeting nearly mass-degenerate higgsino-like charginos and neutralinos. For mass splittings of 0.3$-$1 GeV, the chargino decays to the lightest neutralino and a …

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Search for the single production of vector-like quarks decaying into a W boson and a b quark using single-lepton final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, W. Adam et autres

A search is performed for the single production of a heavy vector-like quark (VLQ), decaying into a W boson and a b quark. The analysis uses proton-proton collision data collected by the CMS experiment at the CERN LHC at a center-of-mass energy …

Improved results on Higgs boson pair production in the 4b final state

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, W. Adam et autres

Measurements of Higgs boson pair (HH) production in the four bottom quark (4b) final state are presented using proton-proton (pp) collision data at $\sqrt{s}$ = 13.6 TeV collected by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of …

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Search for light charged Higgs bosons decaying to charm and strange quarks in $\mathrm{t\bar{t}}$ events in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, W. Adam et autres

A search is presented for a light charged Higgs boson H$^\pm$ in top quark pair production ($\mathrm{t\bar{t}}$), where one of the top quarks decays to an H$^\pm$ and a bottom quark, while the other decays to a W$^\mp$ boson and a bottom …

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Search for heavy resonances decaying into four-lepton final states via light bosons in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, W. Adam et autres

A search for a resonance heavier than 250 GeV decaying into four leptons via two intermediate bosons is presented. The search uses proton-proton collision data at $\sqrt{s}$ = 13 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 138 …

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