# Abstract

# Theoretical background

## Standard model

 - issues

### q*

 - common conclusion from composite models

## LHC

.

.

.

### CMS

.

.

.

#### Jets

.

.

.

# Search for excited quarks

.

.

.

## Method of analysis

 - dominant background: QCD (gg-gg e.g. - two jets)
 - division in QCD bg and signal

### Signal/Background modelling

 - expected: bg smooth falling

## Event selection

- division in pre/post selection
- preselection for trigger efficiency and general physical cuts
- post selection to apply different taggers

### Preselection

.

.

.

### Tagger

 - Cut on softdropmass

#### Tau21

.

.

.

#### DeepBoosted

.

.

.

### Optimization

.

.

.

## Data MC Comparision

.

### Sideband

.

## Uncertainties (?)

.

.

.

# Results

.

.

.

## 2016

.

.

.

### previous research

.

.

.

## 2016 + 2017 + 2018

.

.

.

# Summary
