Search for quantum black hole production in lepton+jet final states using proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector

TL;DR

This paper reports a search for quantum black holes in lepton+jet final states using 13 TeV proton-proton collision data from the ATLAS detector, setting new mass limits for various models.

Contribution

It presents the first search for quantum black holes in lepton+jet channels at the LHC, establishing new lower mass bounds in specific theoretical models.

Findings

No significant excess observed over Standard Model predictions.

Lower mass limits for quantum black holes are set at 9.2 TeV and 6.8 TeV for different models.

Constraints improve previous bounds on quantum black hole production.

Abstract

A search for quantum black holes in electron+jet and muon+jet invariant mass spectra is performed with 140 fb$^{-1}$ of data collected by the ATLAS detector in proton-proton collisions at $\sqrt{s}$ = 13 TeV at the Large Hadron Collider. The observed invariant mass spectrum of lepton+jet pairs is consistent with Standard Model expectations. Upper limits are set at 95% confidence level on the production cross-sections times branching fractions for quantum black holes decaying into a lepton and a quark in a search region with invariant mass above 2.0 TeV. The resulting quantum black hole lower mass threshold limit is 9.2 TeV in the Arkani-Hamed-Dimopoulos-Dvali model, and 6.8 TeV in the Randall-Sundrum model.