Search for Higgs boson pair production in the bb¯bb¯ final state from pp collisions at √s = 8 TeVwith the ATLAS detector

The ATLAS Collaboration

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

A search for Higgs boson pair production pp → hh is performed with 19.5 fb-1 of proton–proton collision data at √s=8 TeV, which were recorded by the ATLAS detector at the Large Hadron Collider in 2012. The decay products of each Higgs boson are reconstructed as a high-momentum bb¯ system with either a pair of small-radius jets or a single large-radius jet, the latter exploiting jet substructure techniques and associated b-tagged track-jets. No evidence for resonant or non-resonant Higgs boson pair production is observed. The data are interpreted in the context of the Randall–Sundrum model with a warped extra dimension as well as the two-Higgs-doublet model. An upper limit on the cross-section for pp → GKK → hh → bb¯bb¯ of 3.2 (2.3) fb is set for a Kaluza–Klein graviton GKK mass of 1.0 (1.5) TeV, at the 95 % confidence level. The search for non-resonant Standard Model hh production sets an observed 95 % confidence level upper limit on the production cross-section σ(pp → hh → bb¯bb¯) of 202 fb, compared to a Standard Model prediction of σ(pp → hh → bb¯bb¯)=3.6±0.5 fb.

Original languageEnglish (US)
Article number412
JournalEuropean Physical Journal C
Volume75
Issue number9
DOIs
StatePublished - Sep 13 2015

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Bosons
pair production
Higgs bosons
Detectors
collisions
detectors
confidence
radii
Colliding beam accelerators
cross sections
gravitons
substructures
Momentum
momentum
decay
products
predictions

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Engineering (miscellaneous)

Cite this

Search for Higgs boson pair production in the bb¯bb¯ final state from pp collisions at √s = 8 TeVwith the ATLAS detector. / The ATLAS Collaboration.

In: European Physical Journal C, Vol. 75, No. 9, 412, 13.09.2015.

Research output: Contribution to journalArticle

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abstract = "A search for Higgs boson pair production pp → hh is performed with 19.5 fb-1 of proton–proton collision data at √s=8 TeV, which were recorded by the ATLAS detector at the Large Hadron Collider in 2012. The decay products of each Higgs boson are reconstructed as a high-momentum bb¯ system with either a pair of small-radius jets or a single large-radius jet, the latter exploiting jet substructure techniques and associated b-tagged track-jets. No evidence for resonant or non-resonant Higgs boson pair production is observed. The data are interpreted in the context of the Randall–Sundrum model with a warped extra dimension as well as the two-Higgs-doublet model. An upper limit on the cross-section for pp → GKK ∗ → hh → bb¯bb¯ of 3.2 (2.3) fb is set for a Kaluza–Klein graviton GKK ∗ mass of 1.0 (1.5) TeV, at the 95 {\%} confidence level. The search for non-resonant Standard Model hh production sets an observed 95 {\%} confidence level upper limit on the production cross-section σ(pp → hh → bb¯bb¯) of 202 fb, compared to a Standard Model prediction of σ(pp → hh → bb¯bb¯)=3.6±0.5 fb.",
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