Abstract

A search for new physics in events with jets, b-tagged jets, missing transverse momentum, and no leptons, corresponding to an integrated luminosity of 35.9 fb-1 collected by the CMS experiment at sqrt(s) = 13 TeV, is presented. No significant excess of events on top of the standard model background expectation is observed. Results are interpreted in terms of a number of simplified supersymmetry models featuring squark and gluino production, and in terms of the pMSSM-19. For simplified models, lower limits on the gluino (squark) mass are established in the range 1.80-1.95 TeV (1.00-1.05 TeV), assuming a massless lightest supersymmetric particle.

Highlights

  • Many physics models beyond the SM predict an excess of final states with a large number of jets and missing transverse momentum to be seen in high-energy proton-proton collision events

  • Four SM processes constitute the primary source of background events in the search region: events containing leptons that fail some aspect of the selection, events with hadronically-decaying tau leptons produced in association with jets, events with invisibly-decaying Z-bosons produced in association with jets, and QCD multi-jet events in which the energy of one or more jets is significantly mismeasured

  • The results are interpreted in terms of various simplified model spectra (SMS), and in terms of the pMSSM

Read more

Summary

Introduction

Many physics models beyond the SM predict an excess of final states with a large number of jets and missing transverse momentum to be seen in high-energy proton-proton (pp) collision events. R-parity conserving supersymmetry (SUSY) models featuring squarks and gluinos with masses of order 1 TeV would be expected to manifest with these signatures at the LHC. These models can famously resolve the fine tuning issue known as the large hierarchy problem [1] and potentially provide a particle-based account of dark matter. This note describes the methodology, results, and an interpretation of a search for evidence of new physics manifesting in such a manner in data collected by the CMS detector [2].

Object and event selection
SM background estimation
Lost lepton background
Hadronic τ background
Z to invisible background
QCD multi-jet background
Results and Interpretation
Conclusion
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call