Abstract
A search for heavy neutral Higgs bosons produced in association with one or two π-quarks and decaying to π-quark pairs is presented using 27.8ββfbβ1 of βπ =13ββTeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider during 2015 and 2016. No evidence of a signal is found. Upper limits on the heavy neutral Higgs boson production cross section times its branching ratio to πβ’
Β―
π
are set, ranging from 4.0 to 0.6 pb at 95% confidence level over a Higgs boson mass range of 450 to 1400 GeV. Results are interpreted within the two-Higgs-doublet model and the minimal supersymmetric Standard Model.