Search for a heavy vector resonance decaying to a Z boson and a Higgs boson in proton-proton collisions at $\sqrt{s} = $ 13 TeV

The CMS collaboration
Eur.Phys.J.C 81 (2021) 688, 2021.

Abstract (data abstract)
This paper describes the search for a heavy vector resonance decaying into a Z boson and the standard model Higgs boson, where the Z boson is identified through its leptonic decays to electrons, muons, or neutrinos, and the Higgs boson is identified through its hadronic decays. The search is performed in a Lorentz-boosted regime for resonances with masses larger than 800 GeV. The data samples of proton-proton collisions were collected from 2016 to 2018 at a center-of-mass energy of 13 TeV by the CMS experiment at CERN and correspond to an integrated luminosity of 137 $\text{fb}^{-1}$. Upper limits are derived on the production of a narrow heavy resonance Z' as a function of the Z' mass, and a mass below 3.5 and 3.7 TeV is excluded at 95% confidence level in models where the heavy vector boson couples exclusively to fermions and to bosons, respectively. These are the most stringent limits placed on the Heavy Vector Triplet Z' model to date. If the heavy vector boson couples exclusively to standard model bosons, upper limits on the product of the cross section and branching fraction are set between 23 and 0.3 $\text{fb}$ for a Z' mass between 0.8 and 4.6 TeV, respectively. This is the first limit set on a heavy vector boson coupling exclusively to standard model bosons in its production and decay.

  • Signal efficiency for 0l non-VBF categories

    Data from Figure 2 (upper left), located on page 6

    10.17182/hepdata.101374.v1/t1

    The product of signal acceptance and efficiency in the 0l categories for the signal produced via qqbar annihilation.

  • Signal efficiency for 2l non-VBF categories

    Data from Figure 2 (upper right), located on page 6

    10.17182/hepdata.101374.v1/t2

    The product of signal acceptance and efficiency in the 2l categories for the signal produced via qqbar annihilation.

  • Signal efficiency for 0l VBF categories

    Data from Figure 2 (lower left), located on page 6

    10.17182/hepdata.101374.v1/t3

    The product of signal acceptance and efficiency in the 0l categories for the signal produced via vector boson fusion.

  • Signal efficiency for 2l VBF categories

    Data from Figure 2 (lower right), located on page 6

    10.17182/hepdata.101374.v1/t4

    The product of signal acceptance and efficiency in the 2l categories for the signal produced via vector boson fusion.

  • $m_{X}^{T}$ distribution in 0l 2b tag non VBF category

    Data from Figure 5 (top left), located on page 12

    10.17182/hepdata.101374.v1/t5

    $m_{X}^{T}$ distribution in data in the 0l 2b non-VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}^{T}$ distribution in 0l $\leq$1b tag non VBF category

    Data from Figure 5 (top right), located on page 12

    10.17182/hepdata.101374.v1/t6

    $m_{X}^{T}$ distribution in data in the 0l $\leq$1b non-VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}$ distribution in 2e 2b tag non VBF category

    Data from Figure 5 (center left), located on page 12

    10.17182/hepdata.101374.v1/t7

    $m_{X}$ distribution in data in the 2e 2b non-VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}$ distribution in 2e $\leq$1b tag non VBF category

    Data from Figure 5 (center right), located on page 12

    10.17182/hepdata.101374.v1/t8

    $m_{X}$ distribution in data in the 2e $\leq$1b non-VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}$ distribution in 2$\mu$ 2b tag non VBF category

    Data from Figure 5 (bottom left), located on page 12

    10.17182/hepdata.101374.v1/t9

    $m_{X}$ distribution in data in the 2$\mu$ 2b non-VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}$ distribution in 2$\mu$ $\leq$1b tag non VBF category

    Data from Figure 5 (bottom right), located on page 12

    10.17182/hepdata.101374.v1/t10

    $m_{X}$ distribution in data in the 2$\mu$ $\leq$1b non-VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}^{T}$ distribution in 0l 2b tag VBF category

    Data from Figure 6 (top left), located on page 13

    10.17182/hepdata.101374.v1/t11

    $m_{X}^{T}$ distribution in data in the 0l 2b VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}^{T}$ distribution in 0l $\leq$1b tag VBF category

    Data from Figure 6 (top right), located on page 13

    10.17182/hepdata.101374.v1/t12

    $m_{X}^{T}$ distribution in data in the 0l $\leq$1b VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}$ distribution in 2e 2b tag VBF category

    Data from Figure 6 (center left), located on page 13

    10.17182/hepdata.101374.v1/t13

    $m_{X}$ distribution in data in the 2e 2b VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}$ distribution in 2e $\leq$1b tag VBF category

    Data from Figure 6 (center right), located on page 13

    10.17182/hepdata.101374.v1/t14

    $m_{X}$ distribution in data in the 2e $\leq$1b VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}$ distribution in 2$\mu$ 2b tag VBF category

    Data from Figure 6 (bottom left), located on page 13

    10.17182/hepdata.101374.v1/t15

    $m_{X}$ distribution in data in the 2$\mu$ 2b VBF category. The data is shown as Events/10 GeV. The distribution is...

  • $m_{X}$ distribution in 2$\mu$ $\leq$1b tag VBF category

    Data from Figure 6 (bottom right), located on page 13

    10.17182/hepdata.101374.v1/t16

    $m_{X}$ distribution in data in the 2$\mu$ $\leq$1b VBF category. The data is shown as Events/10 GeV. The distribution is...

  • Observed 95% CL upper limit non-VBF signal

    Data from Figure 7 (left), located on page 16

    10.17182/hepdata.101374.v1/t17

    Observed and expected 95% CL upper limit on $\sigma \mathcal{B}$(Z'-> ZH) with all categories combined for the non-VBF signal, including...

  • Observed 95% CL upper limit VBF signal

    Data from Figure 7 (right), located on page 16

    10.17182/hepdata.101374.v1/t18

    Observed and expected 95% CL upper limit on $\sigma \mathcal{B}$(Z'-> ZH) with all categories combined for the VBF signal, including...

  • Obs. exclusion limit for 2 TeV as function of HVT model par.

    Data from Figure 8, located on page 17

    10.17182/hepdata.101374.v1/t19

    Observed exclusion limit in the space of the HVT model parameters [$g_{V}c_{H}$, $g^{2}c_{F}/g_{V}$] for mass hypotheses of 2 TeV for...

  • Obs. exclusion limit for 3 TeV as function of HVT model par.

    Data from Figure 8, located on page 17

    10.17182/hepdata.101374.v1/t20

    Observed exclusion limit in the space of the HVT model parameters [$g_{V}c_{H}$, $g^{2}c_{F}/g_{V}$] for mass hypotheses of 3 TeV for...

  • Obs. exclusion limit for 4 TeV as function of HVT model par.

    Data from Figure 8, located on page 17

    10.17182/hepdata.101374.v1/t21

    Observed exclusion limit in the space of the HVT model parameters [$g_{V}c_{H}$, $g^{2}c_{F}/g_{V}$] for mass hypotheses of 4 TeV for...

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