Search for TeV-scale gravity signatures in final states with leptons and jets with the ATLAS detector at sqrt(s) = 7 TeV

TL;DR

This paper reports a search for TeV-scale gravity signatures in proton-proton collisions at 7 TeV using the ATLAS detector, finding no evidence of new physics but setting limits on models involving microscopic black holes and string balls.

Contribution

First search for TeV-scale gravity signatures in leptons and jets at 7 TeV with ATLAS, establishing exclusion limits on black hole and string ball production models.

Findings

No excess beyond Standard Model expectations observed.

Set upper limits on cross sections for non-Standard Model processes.

Excluded regions in parameter space for black hole and string ball models.

Abstract

The production of events with multiple high transverse momentum particles including charged leptons and jets is measured, using 1.04 fb-1 of proton-proton collision data recorded by the ATLAS detector during the first half of 2011 at sqrt(s) = 7 TeV. No excess beyond Standard Model expectations is observed, and upper limits on the fiducial cross sections for non-Standard Model production of these final states are set. Using models for string ball and black hole production and decay, exclusion contours are determined as a function of mass threshold and the fundamental gravity scale.