# Abstract

# Theoretical background

## Standard model

 - issues

### q*

 - common conclusion from composite models

## LHC

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### CMS

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#### Jets

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# Search for excited quarks

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## 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

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### Tagger

 - Cut on softdropmass

#### Tau21

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#### DeepBoosted

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### Optimization

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## Data MC Comparision

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### Sideband

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## Uncertainties (?)

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# Results

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## 2016

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### previous research

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## 2016 + 2017 + 2018

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# Summary