Search for dark matter produced in association with a leptonically decaying $${\mathrm{Z}} $$ Z boson in proton–proton collisions at $$\sqrt{s}=13\,\text {Te}\text {V} $$ s = 13 Te
Name
10052_2020_Article_8739.pdf
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2.75 MB
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Author(s)
Sirunyan, A. M
Tumasyan, A.
Adam, W.
Bergauer, T.
Dragicevic, M.
Erö, J.
Valle, A. E D
Frühwirth, R.
Jeitler, M.
Krammer, N.
Date Issued
January 11, 2021
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal C. 2021 Jan 11;81(1):13
Version
Final published version
Abstract
Abstract
A search for dark matter particles is performed using events with a Z boson candidate and large missing transverse momentum. The analysis is based on proton–proton collision data at a center-of-mass energy of 13
$$\,\text {Te}\text {V}$$
Te
, collected by the CMS experiment at the LHC in 2016–2018, corresponding to an integrated luminosity of 137
$$\,\text {fb}^{-1}$$
fb
-
1
. The search uses the decay channels
$${\mathrm{Z}} \rightarrow {\mathrm{e}} {\mathrm{e}} $$
Z
→
e
e
and
$${\mathrm{Z}} \rightarrow {{\upmu }{}{}} {{\upmu }{}{}} $$
Z
→
μ
μ
. No significant excess of events is observed over the background expected from the standard model. Limits are set on dark matter particle production in the context of simplified models with vector, axial-vector, scalar, and pseudoscalar mediators, as well as on a two-Higgs-doublet model with an additional pseudoscalar mediator. In addition, limits are provided for spin-dependent and spin-independent scattering cross sections and are compared to those from direct-detection experiments. The results are also interpreted in the context of models of invisible Higgs boson decays, unparticles, and large extra dimensions.
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/s10052-020-08739-5
