Search for a CP-odd Higgs boson decaying to Zh in p

F. MONTICELLI; ATLAS CLLABORATION

PHYSICS LETTERS B

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2015 vol. 1 p. 1 - 20

0370-2693

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?1000 GeV . The results are combined and interpreted in the context of two-Higgs-doublet models.