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

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  • The ATLAS collaboration
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<mark>Journal publication date</mark>11/05/2015
<mark>Journal</mark>Physics Letters B
Volume744
Number of pages21
Pages (from-to)163-183
Publication StatusPublished
Early online date28/03/15
<mark>Original language</mark>English

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 → f ¯f ) are 0.098–0.013 pb for f = τ and 0.57–0.014 pb for f = b in a range
of mA = 220–1000 GeV. The results are combined and interpreted in the context of two-Higgs-doublet models.

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This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.