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CERN Document Server 14 records found  1 - 10próximo  jump to record: Search took 0.60 seconds. 
1.
Search for vector-like quarks, heavy neutral leptons and long-lived particles in ATLAS and CMS experiments / Grancagnolo, Sergio (INFN Lecce e Universita del Salento (IT)) /ATLAS Collaboration
Various theories beyond the Standard Model predict heavy neutral leptons, or long-lived particles with unique signatures which are difficult to reconstruct. Another area of interest are vector-like quarks (VLQs) which lie at the heart of many extensions to the Standard Model seeking to address the Hierarchy Problem, as they can naturally cancel the mass divergence for the Higgs boson. [...]
ATL-PHYS-SLIDE-2024-060.- Geneva : CERN, 2024 Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 58th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 24 - 31 Mar 2024
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2.
Search for Long-Lived Particles in ATLAS with Displaced Vertex Signatures in Multi-Jet-Triggered Events / Rousso, David (University of Cambridge (GB)) ; ATLAS Collaboration /ATLAS Collaboration
Higgs portal dark sector models propose that dark matter lives in a "dark sector" (DS), potentially with higher generation particles, which due to their mass couples to the standard model (SM) via the Higgs. These higher generation DS particles could have long lifetimes if their coupling is weak. [...]
ATL-PHYS-SLIDE-2022-598.- Geneva : CERN, 2022 Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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3.
Long lived particles at LHC (not HNL) / Rousso, David (University of Cambridge (GB)) /ATLAS Collaboration
Long-lived particles (LLPs) are an important possibility to be aware of when searching for physics beyond the standard model, as there is no a priori reason for any undiscovered particle byond the standard model (BSM) to have such a short lifetime as to decay promptly. However, searching for these particles requires a vast array of creative approaches to target their many different possible signatures across the different portions of the detectors. [...]
ATL-PHYS-SLIDE-2022-464.- Geneva : CERN, 2022 Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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4.
Search for neutral long-lived particles in $pp$ collisions at $ \sqrt{s} $ = 13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter / ATLAS Collaboration
A search for decays of pair-produced neutral long-lived particles (LLPs) is presented using 139 fb$^{-1}$ of proton-proton collision data collected by the ATLAS detector at the LHC in 2015-2018 at a centre-of-mass energy of 13 TeV. Dedicated techniques were developed for the reconstruction of displaced jets produced by LLPs decaying hadronically in the ATLAS hadronic calorimeter. [...]
arXiv:2203.01009; CERN-EP-2022-002.- Geneva : CERN, 2022-06-01 - 47 p. - Published in : JHEP 2206 (2022) 005 Fulltext: 2203.01009 - PDF; document - PDF; External link: Previous draft version
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5.
Searches for exotic physics with unconventional signatures at ATLAS and CMS / Sebastiani, Cristiano (University of Liverpool (GB)) /ATLAS Collaboration
Searches for exotic physics with unconventional signatures at ATLAS and CMS
ATL-PHYS-SLIDE-2021-078.- Geneva : CERN, 2021 Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 55th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile (italy), Italy, 28 Mar - 4 Apr 2020
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6.
Searches for dark photon with the ATLAS detector at the LHC / El Jarrari, Hassnae (University Mohammed V in Rabat)
Many extensions to the Standard Model (SM) introduce a hidden or dark sector (DS) to provide candidates for dark matter in the universe and an explanation to astrophysical observations such as the positron excess observed in the cosmic radiation flux. [...]
ATL-PHYS-PROC-2020-057. - 2020. - 5 p.
Original Communication (restricted to ATLAS) - Full text
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7.
Searches for dark photon with the ATLAS detector at the LHC / El Jarrari, Hassnae (University Mohammed V in Rabat) /ATLAS Collaboration
Many extensions to the Standard Model introduce a hidden or dark sector to provide candidates for dark matter in the universe an explanation to astrophysical observations such as the positron excess observed in the cosmic radiation flux. this hidden sector could rise from an additional U(1)d gauge symmetry. [...]
ATL-PHYS-SLIDE-2020-152.- Geneva : CERN, 2020 - 1 p. Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 8th Conference of Large Hadron Collider Physics, Online, Fra, 25 - 30 May 2020
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8.

CMS-PHO-EVENTS-2020-002
© 2020-2022 CERN 		CMS Event Displays for EXO-19-011
A simulated CMS collision where a long-lived simul [...]
05/03/2020
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9.
Search for displaced lepton jets with the ATLAS experiment / Salvatore, Daniela (INFN Gruppo Collegato di Cosenza and Universita' della Calabria, Dipartimento di Fisica) /ATLAS Collaboration
Several possible extensions of the Standard Model predict the existence of a dark sector that is weakly coupled to the visible one: i.e. the two sectors couple via the vector portal, where a dark photon with mass in the MeV to GeV range mixes kinetically with the SM photon. [...]
ATL-PHYS-SLIDE-2018-873.- Geneva : CERN, 2018 - 1 p. Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 26th International Conference on Supersymmetry and Unification of Fundamental Interactions (SUSY2018), Barcelona, Spain, 23 - 27 Jul 2018
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10.

CMS-PHO-EVENTS-2018-007
© 2018 CERN, for the benefit of the CMS Collaboration 		Displays of a collision event from a search for new particles decaying to a jet and an emerging jet in the CMS detector
These images depict a collision event which exhibi [...]
30/08/2018
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