Search for Resonant and Nonresonant Higgs Boson Pair Production in the b(b)over-bar tau(+) tau(-) Decay Channel in pp Collisions at root s=13 TeV with the ATLAS DetectorShow others and affiliations
Number of Authors: 29132018 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 121, no 19, article id 191801Article in journal (Refereed) Published
Abstract [en]
A search for resonant and nonresonant pair production of Higgs bosons in the b (b) over bar tau(+)tau(-) final state is presented. The search uses 36.1 fb(-1) of pp collision data with root s = 13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. Decays of the tau-lepton pairs with at least one tau 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 < m(X) < 402 GeV in the simplified hMSSM minimal supersymmetric model for tan beta = 2 and excluding bulk Randall-Sundrum gravitons G(KK) in the mass range 325 GeV < m(GKK) < 885 GeV for k/(M) over bar P-1 = 1.
Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 121, no 19, article id 191801
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-387251DOI: 10.1103/PhysRevLett.121.191801ISI: 000449402500001PubMedID: 30468613OAI: oai:DiVA.org:uu-387251DiVA, id: diva2:1331332
Funder
EU, European Research CouncilSwedish Research CouncilEU, Horizon 2020
Note
For complete list of authors see http://dx.doi.org/10.1103/PhysRevLett.121.191801
2019-06-262019-06-262019-06-26Bibliographically approved