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

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

G. Aad, B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, M. Abolins, O.S. AbouZeid, H. Abramowicz, …
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol.744, pp.163-183
01/05/2015
DOI: https://doi.org/10.1016/j.physletb.2015.03.054

Abstract

ATLAS BSM Higgs boson
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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