Searches for Higgs boson pair production at the High Luminosity Large Hadron Collider (HL-LHC) with the ATLAS experiment
Lead Research Organisation:
University of Birmingham
Department Name: School of Physics and Astronomy
Abstract
The Large Hadron Collider (LHC) at CERN will be undergoing an upgrade at the end of 2022 which will increase its delivered energy and probe the new energy frontier. The Higgs boson self coupling is an important parameter predicted by the standard model of particle physics that is still yet to be discovered. This study looks for di-Higgs production in the promising bbyy final state, with one Higgs decaying to a b and anti-b quark and the 2nd to a pair of photons. I have developed a method based on weights to exploit the low statistics available. Also implemented a Boosted Decision Tree (BDT) to further increase the chance of detecting the HH->bbyy signal from the huge backgrounds expected at the HL-LHC.
Organisations
People |
ORCID iD |
| Philip Allport (Primary Supervisor) | |
| Daniel Briglin (Student) |
Studentship Projects
| Project Reference | Relationship | Related To | Start | End | Student Name |
|---|---|---|---|---|---|
| ST/N503939/1 | 01/10/2015 | 30/03/2021 | |||
| 1658252 | Studentship | ST/N503939/1 | 01/10/2015 | 31/03/2019 | Daniel Briglin |
| Title | Weighted method for data analysis with limited statistics |
| Description | A method of data analysis where statistics are limited. Combinations of all possible outcomes are calculated with a probability to occur (weight). |
| Type Of Material | Improvements to research infrastructure |
| Year Produced | 2017 |
| Provided To Others? | No |
| Impact | An increase in the signal observed and a decrease in backgrounds (both good for particle physics). Decrease in the processing time for a set number of events |
| Description | Guided tours of ATLAS |
| Form Of Engagement Activity | Participation in an open day or visit at my research institution |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Public/other audiences |
| Results and Impact | I gave 3 tours of the ATLAS underground cavern. |
| Year(s) Of Engagement Activity | 2018 |
| Description | Presentations on my work (too many to note them all) |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Postgraduate students |
| Results and Impact | Many talks given about my work to many different audiences |
| Year(s) Of Engagement Activity | 2015,2016,2017,2018 |
| Description | School Visits to CERN x 4 |
| Form Of Engagement Activity | Participation in an open day or visit at my research institution |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Postgraduate students |
| Results and Impact | 30 x 4 pupils attended for a school visit to the research organisation, which sparked questions and discussion afterwards, and the school reported increased interest in related subject areas. |
| Year(s) Of Engagement Activity | 2017,2018 |