Search for pair production of Higgs bosons in the bb bb final state using proton-proton collisions at ps = 13 TeV with the ATLAS detector

Aaboud, M, Abbott, B, Aad, G, Abraham, N L, Allbrooke, B, Asquith, L, Cerri, A, Safarzadeh Samani, B, De Santo, A, Salvatore, F, Shaw, K, Stevenson, T, Suruliz, K, The Atlas Collaboration, and others, (2019) Search for pair production of Higgs bosons in the bb bb final state using proton-proton collisions at ps = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2019 (30). pp. 1-49. ISSN 1126-6708

[img] PDF - Published Version
Available under License Creative Commons Attribution.

Download (1MB)
[img] PDF - Accepted Version
Available under License Creative Commons Attribution.

Download (1MB)

Abstract

A search for Higgs boson pair production in the bbbb final state is carried out with up to 36.1 fb1 of LHC proton–proton collision data collected at ps = 13 TeV with the ATLAS detector in 2015 and 2016. Three benchmark signals are studied: a spin-2 graviton decaying into a Higgs boson pair, a scalar resonance decaying into a Higgs boson pair, and Standard Model non-resonant Higgs boson pair production. Two analyses are carried out, each implementing
a particular technique for the event reconstruction that targets Higgs bosons reconstructed as pairs of jets or single boosted jets. The resonance mass range covered is 260–3000 GeV. The analyses are statistically combined and upper limits on the production cross section of Higgs boson pairs times branching ratio to bbbb are set in each model. No significant excess is observed; the largest deviation of data over prediction is found at a mass of 280 GeV,
corresponding to 2.3 standard deviations globally. The observed 95% confidence level upper limit on the non-resonant production is 13 times the Standard Model prediction.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Amelia Redman
Date Deposited: 22 Aug 2019 08:58
Last Modified: 22 Aug 2019 09:00
URI: http://sro.sussex.ac.uk/id/eprint/85600

View download statistics for this item

📧 Request an update