Measurements of $${\mathrm{p}} {\mathrm{p}} \rightarrow {\mathrm{Z}} {\mathrm{Z}} $$ p p → Z Z production cross sections and constraints on anomalous triple gauge couplings at $$\sqrt{s} = 13\,\text {TeV} $$ s = 13 TeV
Name
10052_2020_Article_8817.pdf
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2.17 MB
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Author(s)
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Bergauer, T.
Dragicevic, M.
Erö, J.
Valle, A. E. D.
Frühwirth, R.
Jeitler, M.
Date Issued
March 1, 2021
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal C. 2021 Mar 01;81(3):200
Version
Final published version
Abstract
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
-
1
, collected during 2016–2018. The
$${\mathrm{Z}} {\mathrm{Z}} $$
Z
Z
production cross section,
$$\sigma _{\text {tot}} ({\mathrm{p}} {\mathrm{p}} \rightarrow {\mathrm{Z}} {\mathrm{Z}} ) = 17.4 \pm 0.3 \,\text {(stat)} \pm 0.5 \,\text {(syst)} \pm 0.4 \,\text {(theo)} \pm 0.3 \,\text {(lumi)} \text { pb} $$
σ
tot
(
p
p
→
Z
Z
)
=
17.4
±
0.3
(stat)
±
0.5
(syst)
±
0.4
(theo)
±
0.3
(lumi) pb
, measured for events with two pairs of opposite-sign, same-flavor leptons produced in the mass region
$${60< m_{\ell ^+\ell ^-} < 120\,\text {GeV}}$$
60
<
m
ℓ
+
ℓ
-
<
120
GeV
is consistent with standard model predictions. Differential cross sections are also measured and agree with theoretical predictions. The invariant mass distribution of the four-lepton system is used to set limits on anomalous
$${\mathrm{Z}} {\mathrm{Z}} {\mathrm{Z}} $$
Z
Z
Z
and
$${{\mathrm{Z}} {\mathrm{Z}} \gamma }$$
Z
Z
γ
couplings.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-020-08817-8
