Searches for New Physics in Multijet Final States

TL;DR

This paper reports on searches for new physics in multijet final states using 8 TeV LHC data, including resonance and jet extinction searches, but finds no evidence of new phenomena, setting new limits on various models.

Contribution

It presents the first comprehensive search for new physics in multijet final states at 8 TeV, including baseline cross section measurements and limits on multiple models.

Findings

No evidence of new physics observed.

Set new limits on model parameters.

Baseline inclusive jet cross section measured.

Abstract

A variety of new physics models predict heavy resonances that decay to multiple hadronic jets. These models include axigluons, colorons, diquarks, excited quarks, Randall-Sundrum gravitons, string resonances, and Z' models, among others. Other models make the prediction that high-pT jets will be suppressed, resulting in jet extinction. Using the data collected in 2012 at a center-of-mass energy of 8 TeV, the CMS Collaboration has made a baseline inclusive jet cross section measurement for comparison with new-physics searches, and then performed searches for jet extinction and resonances that decay to two hadronic jets. The results of these searches will be presented. No evidence of new physics has been observed, and these results set new limits on the parameters of these models.