A search for a heavy, CP-odd Higgs boson, A, decaying into a Z boson and a 125 GeV Higgs boson, h, with the ATLAS detector at the LHC is presented. The search uses proton-proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3 fb<sup>-1</sup>. Decays of CP-even h bosons to ττ or bb pairs with the Z boson decaying to electron or muon pairs are considered, as well as h→bb decays with the Z boson decaying to neutrinos. No evidence for the production of an A boson in these channels is found and the 95% confidence level upper limits derived for σ(gg→A)×BR(A→Zh)×BR(h→ff-) are 0.098-0.013 pb for f=τ and 0.57-0.014 pb for f=b in a range of m<inf>A</inf>=220-1000GeV. The results are combined and interpreted in the context of two-Higgs-doublet models.

Search for a CP-odd Higgs boson decaying to Zh in pp collisions at sqrt(s)=8TeV with the ATLAS detector

BARBERIS, DARIO;COCCARO, ANDREA;FAVARETO, ANDREA;FERRETTO PARODI, ANDREA;GAGLIARDI, GUIDO;GUIDO, ELISA;MIGLIORANZI, SILVIA;OSCULATI, BIANCA MARIA;PARODI, FABRIZIO;SCHIAVI, CARLO;Sforza, F.;
2015-01-01

Abstract

A search for a heavy, CP-odd Higgs boson, A, decaying into a Z boson and a 125 GeV Higgs boson, h, with the ATLAS detector at the LHC is presented. The search uses proton-proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3 fb-1. Decays of CP-even h bosons to ττ or bb pairs with the Z boson decaying to electron or muon pairs are considered, as well as h→bb decays with the Z boson decaying to neutrinos. No evidence for the production of an A boson in these channels is found and the 95% confidence level upper limits derived for σ(gg→A)×BR(A→Zh)×BR(h→ff-) are 0.098-0.013 pb for f=τ and 0.57-0.014 pb for f=b in a range of mA=220-1000GeV. The results are combined and interpreted in the context of two-Higgs-doublet models.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/868633
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