Search for Higgs boson pair production in the γγbb̅ final state with 13 TeV pp collision data collected by the ATLAS experiment

Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Search for Higgs boson pair production in the γγbb̅ final state with 13 TeV pp collision data collected by the ATLAS experiment. Journal of High Energy Physics, 2018(11) Springer 10.1007/JHEP11(2018)040

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A search is performed for resonant and non-resonant Higgs boson pair production in the γγbb̅ final state. The data set used corresponds to an integrated luminosity of 36.1 fb⁻¹ of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No significant excess relative to the Standard Model expectation is observed. The observed limit on the non-resonant Higgs boson pair cross-section is 0.73 pb at 95% confidence level. This observed limit is equivalent to 22 times the predicted Standard Model cross-section. The Higgs boson self-coupling (Kλ = λHHH / λSMHHH) is constrained at 95% confidence level to -8.2 < Kλ < 13.2. For resonant Higgs boson pair production through X → HH → γγbb̅ , the limit is presented, using the narrow-width approximation, as a function of mX in the range 260 GeV < mX < 1000 GeV. The observed limits range from 1.1 pb to 0.12 pb over this mass range.

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:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

18 Jun 2019 15:42

Last Modified:

24 Oct 2019 16:24

Publisher DOI:

10.1007/JHEP11(2018)040

ArXiv ID:

1807.04873

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt

BORIS DOI:

10.7892/boris.129030

URI:

https://boris.unibe.ch/id/eprint/129030

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