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Search for pair production of up-type vector-like quarks and for four-top-quark events in final states with multiple $b$-jets with the ATLAS detector

ArXiv 1803.09678 (2018)
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Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report

(2018)

Authors:

J Bendavid, F Caola, V Ciulli, R Harlander, G Heinrich, J Huston, S Kallweit, S Prestel, E Re, K Tackmann, J Thaler, K Theofilatos, JR Andersen, J Bellm, N Berger, D Bhatia, B Biedermann, S Bräuer, D Britzger, AG Buckley, R Camacho, G Chachamis, S Chatterjee, X Chen, M Chiesa, JR Currie, A Denner, F Dreyer, F Driencourt-Mangin, S Forte, MV Garzelli, T Gehrmann, S Gieseke, EWN Glover, P Gras, N Greiner, C Gütschow, C Gwenlan, M Heil, M Herndon, V Hirschi, AH Hoang, S Höche, A Huss, SP Jones, D Kar, A Karlberg, Z Kassabov, M Kerner, J Klappert, S Kuttimalai, J-N Lang, A Larkoski, JM Lindert, P Loch, K Long, L Lönnblad, G Luisoni, A Maier, P Maierhöfer, D Maître, S Marzani, JA McFayden, I Moult, M Mozer, S Mrenna, B Nachman, D Napoletano, C Pandini, A Papaefstathiou, M Pellen, L Perrozzi, J Pires, S Plätzer, S Pozzorini, S Quackenbush, K Rabbertz, M Rauch, C Reuschle, P Richardson, A Gehrmann-De Ridder, G Rodrigo, J Rojo, R Röntsch, L Rottoli, D Samitz, T Samui, G Sborlini, M Schönherr, S Schumann, L Scyboz, S Seth, H-S Shao, A Siódmok, PZ Skands, JM Smillie, G Soyez, P Sun, MR Sutton, FJ Tackmann, S Uccirati, S Weinzierl, E Yazgan, C-P Yuan, F Yuan
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Search for electroweak production of supersymmetric particles in final states with two or three leptons at $\sqrt{s}=13$ TeV with the ATLAS detector

ArXiv 1803.02762 (2018)
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Discovery prospects of a light Higgs boson at the LHC in type-I 2HDM

Physical Review D American Physical Society (APS) 97:5 (2018) 055027

Authors:

Disha Bhatia, Ushoshi Maitra, Saurabh Niyogi
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Search for electroweak production of supersymmetric states in scenarios with compressed mass spectra at with the ATLAS detector

Physical Review D (2018)

Authors:

C Vittori, I Vivarelli, S Vlachos, M Vogel, P Vokac, G Volpi, von Buddenbrock, E von Toerne, V Vorobel, K Vorobev, M Vos, JH Vossebeld, N Vranjes, M Vranjes Vranjes Milosavljevic, V Vrba, M Vreeswijk, R Vuillermet, I Vukotic, P Wagner, W Wagner, J Wagner-Kuhr, H Wahlberg, S Wahrmund, K Wakamiya, AM Wang

Abstract:

© 2018 CERN. © 2018 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . A search for electroweak production of supersymmetric particles in scenarios with compressed mass spectra in final states with two low-momentum leptons and missing transverse momentum is presented. This search uses proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider in 2015-2016, corresponding to 36.1 fb-1 of integrated luminosity at s=13 TeV. Events with same-flavor pairs of electrons or muons with opposite electric charge are selected. The data are found to be consistent with the Standard Model prediction. Results are interpreted using simplified models of R-parity-conserving supersymmetry in which there is a small mass difference between the masses of the produced supersymmetric particles and the lightest neutralino. Exclusion limits at 95% confidence level are set on next-to-lightest neutralino masses of up to 145 GeV for Higgsino production and 175 GeV for wino production, and slepton masses of up to 190 GeV for pair production of sleptons. In the compressed mass regime, the exclusion limits extend down to mass splittings of 2.5 GeV for Higgsino production, 2 GeV for wino production, and 1 GeV for slepton production. The results are also interpreted in the context of a radiatively-driven natural supersymmetry model with nonuniversal Higgs boson masses.
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