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Searches for Higgs boson pair production in the hh -> bb tau tau, gamma gamma WW*, gamma gamma bb, bbbb channels with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 2869
2015 (English)In: Physical Review D. Particles and fields, ISSN 0556-2821, E-ISSN 1089-4918, Vol. 92, no 9, 092004Article in journal (Refereed) Published
Abstract [en]

Searches for both resonant and nonresonant Higgs boson pair production are performed in the hh -> bb tau tau, gamma gamma WW* final states using 20.3 fb(-1) of pp collision data at a center-of-mass energy of 8 TeV recorded with the ATLAS detector at the Large Hadron Collider. No evidence of their production is observed and 95% confidence-level upper limits on the production cross sections are set. These results are then combined with the published results of the hh -> gamma gamma bb, bbbb analyses. An upper limit of 0.69 (0.47) pb on the nonresonant hh production is observed (expected), corresponding to 70 (48) times the SM gg -> hh cross section. For production via narrow resonances, cross-section limits of hh production from a heavy Higgs boson decay are set as a function of the heavy Higgs boson mass. The observed (expected) limits range from 2.1 (1.1) pb at 260 GeV to 0.011 (0.018) pb at 1000 GeV. These results are interpreted in the context of two simplified scenarios of the Minimal Supersymmetric Standard Model.

Place, publisher, year, edition, pages
American Physical Society , 2015. Vol. 92, no 9, 092004
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-182096DOI: 10.1103/PhysRevD.92.092004ISI: 000364160700001ScopusID: 2-s2.0-84946849532OAI: oai:DiVA.org:kth-182096DiVA: diva2:903213
Funder
Knut and Alice Wallenberg FoundationSwedish Research Council
Note

QC 20160215

Available from: 2016-02-15 Created: 2016-02-15 Last updated: 2016-02-15Bibliographically approved

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Lund-Jensen, BengtSidebo, EdvinStrandberg, Jonas
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