Search for resonant and non-resonant Higgs boson pair production in the bb̅τ⁺τ⁻ decay channel in pp collisions at √s=13 TeV with the ATLAS detector

Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Search for resonant and non-resonant Higgs boson pair production in the bb̅τ⁺τ⁻ decay channel in pp collisions at √s=13 TeV with the ATLAS detector. Physical review letters, 121(19) American Physical Society 10.1103/PhysRevLett.121.191801

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A search for resonant and nonresonant pair production of Higgs bosons in the bb̅τ⁺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 tan β = 2 and excluding bulk Randall-Sundrum gravitons GKK in the mass range 325 GeV <mGKK < 885 GeV for k= M̅Pl =1.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and Beck, Hans Peter

Subjects:

500 Science > 530 Physics

ISSN:

0031-9007

Publisher:

American Physical Society

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

18 Jun 2019 08:56

Last Modified:

23 Oct 2019 01:11

Publisher DOI:

10.1103/PhysRevLett.121.191801

Related URLs:

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt

BORIS DOI:

10.7892/boris.129022

URI:

https://boris.unibe.ch/id/eprint/129022

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