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CERN Document Server Sök i 2,024 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.18 sekunder. 
1.
(100)
Review on Higgs Hidden–Dark Sector Physics at High-Energy Colliders / Lagouri, Theodota (CERN)
=The presence of a hidden or dark sector of phenomena that relates either weakly or in a particular way to Standard Model (SM) fields has theoretical as well as experimental support. Many extensions of SM use hidden or dark sector states to propose a specific candidate for dark matter (DM) in the universe or to explain astrophysical findings. [...]
2022 - 80 p. - Published in : Symmetry 14 (2022) 1299 Fulltext: PDF;
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2.
(91)
ATLAS Searches for Higgs Boson Decays to BSM Dark-Z Bosons in Four-Lepton Final States / Lagouri, Theodota (Instituto De Alta Investigacion Universidad de Tarapaca (CL)) /ATLAS Collaboration
ATLAS searches for a BSM light boson using as portal events where a Higgs boson with mass 125 GeV decays to four leptons are reported. This decay is presumed to occur via an intermediate state which contains one or two on-shell, promptly decaying bosons: H → ZX/XX → 4l, where X is a new dark vector boson $Ζ_d$ (or a pseudo-scalar a), with mass between 1 and 60 GeV. [...]
ATL-PHYS-SLIDE-2021-481.- Geneva : CERN, 2021 - 12 p. Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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3.
(89)
ATLAS searches for Higgs boson decays to BSM dark-Z bosons in four-lepton final states / Lagouri, Theodota (Instituto De Alta Investigacion Universidad de Tarapaca (CL))
ATLAS searches for a BSM light boson using events where a Higgs boson with mass 125 GeV decays to four leptons are reported. [...]
ATL-PHYS-PROC-2022-013. - 2022. - 12 p.
Original Communication (restricted to ATLAS) - Full text
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4.
(81)
Searches for exotic Higgs boson decays with the ATLAS and CMS experiments / Lagouri, Theodota (Yale University)
The observed Higgs boson offers an excellent opportunity to look for new physics at LHC. [...]
ATL-PHYS-PROC-2015-087. - 2015. - 11 p.
Original Communication (restricted to ATLAS) - Full text
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5.
(70)
Searches for Exotic Higgs Boson Decays with the ATLAS and the CMS Experiment / Lagouri, Theodota (Yale University) (+)
This talk will summarize the searches for exotic Higgs boson decays. It should cover decays of the observed Higgs boson to dark sector bosons, lepton flavor violating and flavor changing decays, and decays to a light pseudoscalar neutral Higgs boson as predicted by the NMSSM. [...]
ATL-PHYS-SLIDE-2015-408.- Geneva : CERN, 2015 - 23 p. Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : European Physical Society Conference on High Energy Physics 2015, Vienna, Austria, 22 - 29 Jul 2015
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6.
(48)
Searches Exploiting the Higgs Boson as a 
Dark/Hidden Sector Portal at the LHC / Beacham, James Baker (Ohio State University)
Results are presented from LHC Run 1 ATLAS and CMS searches that use the SM Higgs boson as a portal to dark or hidden sectors, and Run 2 prospects for the same are discussed. The talk will be presented at WIN2015, the 25th International Workshop on Weak Interactions and Neutrinos, 8-13 June 2015 in Heidelberg, Germany..
ATL-PHYS-SLIDE-2015-346.- Geneva : CERN, 2015 - 17 p. Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 10th International Conference on Particles and Nuclei, Heidelberg, Germany, 30 Jul - 3 Aug 1984
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7.
(48)
Signatures of new physics versus the ridge phenomenon in hadron-hadron collisions at the LHC / Sanchis-Lozano, Miguel-Angel (Valencia U., IFIC) ; Sarkisyan-Grinbaum, Edward K. (CERN ; Texas U., Arlington)
In this paper, we consider the possibility that a new stage of matter, stemming from hidden/dark sectors beyond the Standard Model, to be formed in $pp$ collisions at the LHC, can significantly modify the correlations among final-state particles. In particular, two-particle azimuthal correlations are studied by means of a Fourier series sensitive to the near-side ridge effect while assuming that hidden/dark particles decay on top of the conventional parton shower. [...]
arXiv:1808.01463; CERN-TH-2018-103; IFIC/18-29; FTUV-18-08-03.- 2019-05-02 - 8 p. - Published in : MDPI Physics 1 (2019) 84-91 Fulltext from Publisher: PDF;
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8.
(45)
The search for a dark vector boson and a new scalar with the ATLAS detector / Boye, Diallo
Hidden sector or dark sector states appear in many extensions to the Standard Model (SM), to provide particle mediators for dark matter in the universe or to explain astrophysical observations such as the positron excess in the cosmic microwave background radiation flux [...]
CERN-THESIS-2020-180 - 186 p.

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9.
(44)
Search for heavy resonances decaying into a pair of $Z$ bosons using 139 $\mathrm{fb}^{-1}$ of p-p collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / Lagouri, Theodota (Instituto de Alta Investigación, Universidad de Tarapacá)
This paper presents the search for heavy resonances decaying into a pair of Z bosons leading to the $\ell^+\ell^-\ell'^+\ell'^-$ and  $\ell^+\ell^-\nu\bar\nu$ final states, where $\ell$ stands for either an electron or a muon. [...]
ATL-PHYS-PROC-2021-005. - 2022. - 31 p.
Original Communication (restricted to ATLAS) - Full text
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10.
(43)
Constraints on Off-shell Higgs Boson Production and the Higgs Boson Total Width in ZZ Final states with the ATLAS Detector / Lagouri, Theodota (Instituto De Alta Investigacion Universidad de Tarapaca (CL)) /ATLAS Collaboration
The off-shell production of SM Higgs boson, at the high-mass off-peak region beyond 2$m_{Z}$, well above the measured resonance mass of $m_{H}$=125 GeV, has a substantial cross section at the LHC, due to the increased phase space as the Z bosons become on-shell with the increasing energy scale. This presents a novel way of characterizing the properties of the Higgs boson in terms of the off-shell event yields, normalized to the SM prediction (referred to as signal strength μ), and the associated off-shell Higgs boson couplings. [...]
ATL-PHYS-SLIDE-2021-482.- Geneva : CERN, 2021 - 10 p. Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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