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Search for Resonant and Nonresonant Higgs Boson Pair Production in the bb¯τ+τ− Decay Channel in pp Collisions at √s = 13 TeV with the ATLAS Detector

CollaborationWith : Akilli, Ece / Amrouche, Cherifa Sabrina / Ancu, Lucian Stefan / Benoit, Mathieu / Calace, Noemi / Clark, Allan Geoffrey / Della Volpe, Domenico / Di Bello, Francesco / Dubreuil, Arnaud / Ferrere, Didier / Gadatsch, Stefan / Golling, Tobias / Gonzalez Sevilla, Sergio / Iacobucci, Giuseppe / Iizawa, Tomoya / Jansky, Roland / Khoo, Teng Jian / Kiehn, Moritz / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Paolozzi, Lorenzo / Poggi, Riccardo / Raine, Johnny / Salamani, Dalila / Schramm, Steven / Sfyrla, Anna / Sultan, D M S / Valente, Marco / Vicente Barreto Pinto, Mateus / Wu, Xin / Zaffaroni, Ettore
Published in Physical Review Letters. 2018, vol. 121, no. 19
Collection Open Access - SCOAP3
Abstract A search for resonant and nonresonant pair production of Higgs bosons in the bb¯τ+τ− final state is presented. The search uses 36.1 fb−1 of pp collision data with s=13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. Decays of the τ-lepton pairs with at least one τ lepton decaying to final states with hadrons and a neutrino are considered. No significant excess above the expected background is observed in the data. The cross-section times branching ratio for nonresonant Higgs boson pair production is constrained to be less than 30.9 fb, 12.7 times the standard model expectation, at 95% confidence level. The data are also analyzed to probe resonant Higgs boson pair production, constraining a model with an extended Higgs sector based on two doublets and a Randall-Sundrum bulk graviton model. Upper limits are placed on the resonant Higgs boson pair production cross-section times branching ratio, excluding resonances X in the mass range 305 GeV<mX<402 GeV in the simplified hMSSM minimal supersymmetric model for tanβ=2 and excluding bulk Randall-Sundrum gravitons GKK in the mass range 325 GeV<mGKK<885 GeV for k/M¯Pl=1.
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arXiv: 1808.00336
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ATLAS COLLABORATION. Search for Resonant and Nonresonant Higgs Boson Pair Production in the bb¯τ+τ− Decay Channel in pp Collisions at √s = 13 TeV with the ATLAS Detector. In: Physical Review Letters, 2018, vol. 121, n° 19. https://archive-ouverte.unige.ch/unige:111803

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Deposited on : 2018-12-04

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