Searching for leptoquarks with the ATLAS detector

TL;DR

This paper reports on the ATLAS experiment's search for scalar leptoquarks in proton-proton collisions at 13 TeV, setting new exclusion limits on their masses across different generations and decay modes.

Contribution

It provides the most recent exclusion limits on scalar leptoquark masses using 36.1 fb^{-1} of data, improving constraints on their possible existence.

Findings

No significant excess over Standard Model predictions was observed.

First- and second-generation leptoquarks are excluded up to 1400 and 1560 GeV.

Third-generation leptoquarks are excluded up to 1000 GeV.

Abstract

Results from the latest searches for pair-produced scalar leptoquarks using 36.1 $\text{fb}^{-1}$ of $pp$-collision data recorded by the ATLAS detector at $\sqrt{s}$ = 13 TeV were presented. No statistically significant excess of data over Standard Model prediction is observed. The observed limits on first- (second-) generation leptoquark masses are excluded up to 1400 (1560) GeV in the minimal Buchm\"uller-R\"uckl-Wyler model, assuming a leptoquark decay branching ratio of 100% into a charged lepton and a quark. Third generation leptoquark masses are excluded up to 1000 GeV at the highest and lowest decay branching ratios for both up-type and down-type leptoquarks.