# Search for heavy neutral Higgs bosons produced in association with $b$-quarks and decaying into $b$-quarks at $\sqrt{s}=13$ TeV with the ATLAS detector

## TL;DR

This paper reports a search for heavy neutral Higgs bosons produced with b-quarks and decaying into b-quark pairs at 13 TeV, setting upper limits on production cross-sections and interpreting results within theoretical models.

## Contribution

First search for heavy neutral Higgs bosons with b-quark associated production and decay into b-quark pairs at 13 TeV with ATLAS, providing new constraints on models.

## Key findings

- No evidence of Higgs signal found.
- Upper limits on cross-section range from 0.6 to 4.0 pb.
- Results constrain two-Higgs-doublet and MSSM models.

## Abstract

A search for heavy neutral Higgs bosons produced in association with one or two $b$-quarks and decaying to $b$-quark pairs is presented using 27.8 fb$^{-1}$ of $\sqrt{s}=13$ TeV 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 $b\bar{b}$ 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.