Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detectorShow others and affiliations
Number of Authors: 28862015 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 4, article id 117Article in journal (Refereed) Published
Abstract [en]
Results of a search for H -> tau tau decays are presented, based on the full set of proton-proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities of 4.5 fb(-1) and 20.3 fb(-1) at centre-of-mass energies of root s = 7TeV and root s = 8 TeV respectively. All combinations of leptonic (tau -> l nu(nu) over bar with l = e, mu) and hadronic (tau -> hadrons nu) tau decays are considered. An excess of events over the expected background from other Standard Model processes is found with an observed (expected) significance of 4.5 (3.4) standard deviations. This excess provides evidence for the direct coupling of the recently discovered Higgs boson to fermions. The measured signal strength, normalised to the Standard Model expectation, of mu = 1.43(-0.37)(+0.43) is consistent with the predicted Yukawa coupling strength in the Standard Model.
Place, publisher, year, edition, pages
2015. no 4, article id 117
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-255002DOI: 10.1007/JHEP04(2015)117ISI: 000353557400001OAI: oai:DiVA.org:uu-255002DiVA, id: diva2:820735
Note
ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1103/PhysRevLett.114.161801
2015-06-122015-06-122017-12-04Bibliographically approved
In thesis