Measurement of Associated Higgs production in the bb final state with Deep Learning.

Lead Research Organisation: Queen Mary, University of London
Department Name: Physics


The ATLAS experiment expects to approach 5 sigma sensitivity for the measurement of Higgs decays to b-quarks by the end of the current run. Deep learning may offer approaches to enhance this sensitivity beyond current predictions. This project will develop applications of deep learning to particle physics analysis with a focus on the measurement of the Higgs boson decaying into b-quarks when produced in association with a vector boson.


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Studentship Projects

Project Reference Relationship Related To Start End Student Name
ST/N504257/1 01/10/2015 31/03/2021
1928095 Studentship ST/N504257/1 01/10/2017 30/09/2021 Thomas Paul Charman
ST/R50502X/1 01/10/2017 30/09/2021
1928095 Studentship ST/R50502X/1 01/10/2017 30/09/2021 Thomas Paul Charman
Description Within the first few months of my participation in this research a production mechanism and decay mode of the Higgs boson were discovered documented in a publication with which I was involved.

I have developed and created a micron resolution area scanner for use in the quality control of the new ATLAS detector inner tracker which is currently starting production.

I have continued my studies on the Higgs boson by developing the understaing of the largest component of background in the channel of the bb decay with two leptons and also studied the similarities between the two lepton and zero lepton channels.

I have developed along with my co-supervisor some Python software which is used to search for exotic particles & magnetic monopoles at the MoEDAL experiment.
Exploitation Route My findings will inform the next generation of Higgs boson analyses as the game shifts from one discovery to one of measurement. The next major objectives for these searches at the LHC will be to reduce the uncertainty of the measurement of the inclusive signal strength of the Higgs boson in pp collisions as well as to study the Higgs decaying to second generation fermions.
Sectors Aerospace, Defence and Marine,Digital/Communication/Information Technologies (including Software),Electronics,Energy

Description Membership of the ATLAS collaboration 
Organisation European Organization for Nuclear Research (CERN)
Department ATLAS Collaboration
Country Switzerland 
Sector Academic/University 
PI Contribution I have contributed to the activities of the ATLAS collaboration in two main areas. Firstly I have been working the physics analyis group that studies the Higgs boson since the start of this award. These activities include participation in the weekly analysis meetings at the group, sub-group and working group levels. As well as discussing the viability of the work of my collaboraters in these meetings I have also used them as a forum to discuss my own work and where it might fit into the published analysis. Several of the studies/ideas that I have shown in the group meetings now form key parts of the analysis. Secondly I have been involved in the project to build the future ATLAS Inner Tracker. I was personally responsible for the creation of an optical scanning setup which will be used to scan tens of thousands of inner tracker silicon sensors during the production phase of the inner tracker project.
Collaborator Contribution My partners in Higgs group contribute in a very similar manner to my own contributions. Individuals and small teams will focus on a specific part of our analysis, solve a problem or bring some improvement to the table and then as a team we will work out how to fit this work into the wider framework of the analysis. The analysis has very many parts which must all be understood in depth and without the person power of the group it would not be feasible to achieve such an analysis.
Impact Since joining the ATLAS collaboration I have been involved in the publication of one paper listed in the publications section (note I am not on the author list as I had not been a member of the collaboration for long enough when the paper was published).
Start Year 2017
Description Particle Physics Mastercalss for secondary school students 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Schools
Results and Impact Pupils from secondary schools around the world attend universities each year for the particle physics masterclass. The masterclass involves researchers (myself included) explaining how particle physics research is conducted on a large experiment such as the ATLAS experiment. Bespoke software is used to demonstrate this kind of research to the pupils which allows them to engage in an analysis activity themselves. At the end of the session their results are pooled across many schools and a central analysis is performed. The students participate in a video conference with researchers at a central location who have the pooled results and talk through them with the students.
Year(s) Of Engagement Activity 2017,2018,2019,2020