# ALPS2017 -- an Alpine LHC Physics Summit

17-22 April 2017
UZ Obergurgl
Europe/Zurich timezone

## Rebalance and Smear for predicting QCD backgrounds in searches for new physics

21 Apr 2017, 19:10
8m
UZ Obergurgl

#### UZ Obergurgl

University Center Obergurgl Gaisbergweg 5 6456 Obergurgl Austria
Young Scientist Forum Physics Beyond the Standard Model

### Speaker

Marek Adam Niedziela (Hamburg University (DE))

### Description

Searches for new physics in events with multiple jets and large missing transverse momentum are sensitive to a broad set of R-parity conserving SUSY models at the LHC. These searches rely on having an accurate prediction for the QCD background, especially when probing regions of the models with compressed spectra and/or regions featuring the production of light-flavor jets. A method for predicting the QCD background, called rebalance and smear, has been developed to model the multi-jet background for such searches for supersymmetry. A CMS search that makes use the rebalance and smear method in analyzing proton-proton collisions at sqrt(s)=13 TeV is presented, and constraints on various regions of the MSSM are discussed.

### Primary author

Marek Adam Niedziela (Hamburg University (DE))