Search for lepton-flavour-violating decays of the Higgs and Z bosons with the ATLAS detector

Adomeit, S.; Bender, M.; Biebel, O.; Bock, C.; Bortfeldt, J.; Calfayan, P.; Chow, B. K. B.; Duckeck, G.; Heinrich, J. J.; Hertenberger, R.; Hönig, F.; Legger, F.; Lorenz, J.; Lösel, P. J.; Maier, T.; Mann, A.; Mehlhase, S.; Meineck, C.; Mitrevski, J.; Müller, R. S. P.; Rauscher, F.; Ruschke, A.; Schaile, D.; Unverdorben, C.; Valderanis, C.; Walker, R. und Wittkowski, J. (2017): Search for lepton-flavour-violating decays of the Higgs and Z bosons with the ATLAS detector. In: European Physical Journal C, Bd. 77, Nr. 2, 70

Abstract

Direct searches for lepton flavour violation in decays of the Higgs and Z bosons with the ATLAS detector at the LHC are presented. The following three decays are considered: H -> e tau, H -> mu tau, and Z -> mu tau. The searches are based on the data sample of proton-proton collisions collected by the ATLAS detector corresponding to an integrated luminosity of 20.3 fb(-1) at a centre-of-mass energy of root s = 8 TeV. No significant excess is observed, and upper limits on the lepton-flavour-violating branching ratios are set at the 95% confidence level: Br(H -> e tau) < 1.04%, Br(H -> mu tau) < 1.43%, and Br(Z -> mu tau) < 1.69 x 10(-5).

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 1434-6044
• Sprache: Englisch