# Search for scalar resonances decaying into $\mu^{+}\mu^{-}$ in events with and without $b$-tagged jets produced in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

## TL;DR

This paper reports a search for narrow scalar resonances decaying into muon pairs in proton-proton collisions at 13 TeV using ATLAS data, setting upper limits on production cross sections without observing significant signals.

## Contribution

First search for scalar resonances decaying into muon pairs in events with and without b-tagged jets at 13 TeV with ATLAS, providing new upper limits.

## Key findings

- No significant excess observed above Standard Model background.
- Upper limits on cross section times branching ratio range from 1.6 to 44 fb.
- Results are consistent with Standard Model expectations.

## Abstract

A search for a narrow scalar resonance decaying into an opposite-sign muon pair produced in events with and without $b$-tagged jets is presented in this paper. The search uses 36.1 fb$^{-1}$ of $\sqrt{s}= 13$ TeV proton-proton collision data recorded by the ATLAS experiment at the LHC. No significant excess of events above the expected Standard Model background is observed in the investigated mass range of 0.2 to 1.0 TeV. The observed upper limits at 95$\%$ confidence level on the cross section times branching ratio for $b$-quark associated production and gluon-gluon fusion are between 1.9 and 41 fb and 1.6 and 44 fb respectively, which is consistent with expectations.