Precision tests of EWK sector and direct searches for new physics with di-boson production
Lead Research Organisation:
University of Manchester
Department Name: Physics and Astronomy
Abstract
The initial focus of this project is to search for new physics resonances in the electroweak (EWK) sector using data collected from
ATLAS at the LHC. The searches are looking for particles such as the Randell-Sundrum Graviton, G, and the heavy vector boson W0.
The decay channels investigated in this project are ZZ or WZ llqq, where W and Z are the charged and neutral vector bosons l is a lepton
and q is a quark. The lepton is either an electron or a muon and the quarks form jets which can be resolved as either two jets or one large
jet depending on the momentum of the quarks. An important part of these searches are the modeling of the background events and any sys-
tematics associated with the analysis. If no new physics is found then limits will be placed on the production rate for hypothetical signals.
The project will also set limits on the anomalous Triple Gauge Boson Couplings (aTGC), e.g. WW Z, and anomalous Quartic Gauge Bo-
son couplings (aQGC), e.g. WZ X WZ. This is done using the effective Lagrangian approach which investigates the contributions of
loop and off-shell processes to lower energy levels which are achievable at the LHC. The investigations into this look at the kinematic distri-
butions of the WW or WZ to see if there are any signicant changes due these processes.
The authorship task for ATLAS associated with this project is the investigation into the observed innefficiency of the muon trigger full scan
chains in the case of close by muons. The full scan procedure is an event filter process which searches the whole detector without using
any information from the other levels of the trigger. The observed innefficiency is 10% per muon when muons are close each other at
dR < 0:3. The aim of the task is to investigate the problem, its causes and to find a solution to increase the innefficiency.
ATLAS at the LHC. The searches are looking for particles such as the Randell-Sundrum Graviton, G, and the heavy vector boson W0.
The decay channels investigated in this project are ZZ or WZ llqq, where W and Z are the charged and neutral vector bosons l is a lepton
and q is a quark. The lepton is either an electron or a muon and the quarks form jets which can be resolved as either two jets or one large
jet depending on the momentum of the quarks. An important part of these searches are the modeling of the background events and any sys-
tematics associated with the analysis. If no new physics is found then limits will be placed on the production rate for hypothetical signals.
The project will also set limits on the anomalous Triple Gauge Boson Couplings (aTGC), e.g. WW Z, and anomalous Quartic Gauge Bo-
son couplings (aQGC), e.g. WZ X WZ. This is done using the effective Lagrangian approach which investigates the contributions of
loop and off-shell processes to lower energy levels which are achievable at the LHC. The investigations into this look at the kinematic distri-
butions of the WW or WZ to see if there are any signicant changes due these processes.
The authorship task for ATLAS associated with this project is the investigation into the observed innefficiency of the muon trigger full scan
chains in the case of close by muons. The full scan procedure is an event filter process which searches the whole detector without using
any information from the other levels of the trigger. The observed innefficiency is 10% per muon when muons are close each other at
dR < 0:3. The aim of the task is to investigate the problem, its causes and to find a solution to increase the innefficiency.
People |
ORCID iD |
Alexander Oh (Primary Supervisor) | |
David Lack (Student) |
Studentship Projects
Project Reference | Relationship | Related To | Start | End | Student Name |
---|---|---|---|---|---|
ST/N504178/1 | 30/09/2015 | 30/03/2021 | |||
1669021 | Studentship | ST/N504178/1 | 30/09/2015 | 31/03/2019 | David Lack |
Description | ATLAS |
Organisation | ATLAS Experiment |
Country | Switzerland |
Sector | Public |
PI Contribution | I work as part of the VZ to llqq Exotics analysis in the ATLAS experiment. I have worked on the muon trigger software for ATLAS experiment and have attended and presented at the HLT UK meetings. |
Collaborator Contribution | ATLAS has held training exercises in the software and supplied access to data and meta data crucial for the analysis I'm on/ |
Impact | DOI: 10.1007/JHEP03(2018)009 |
Start Year | 2015 |
Description | ATLAS |
Organisation | Atlas UK |
Country | United Kingdom |
Sector | Private |
PI Contribution | I work as part of the VZ to llqq Exotics analysis in the ATLAS experiment. I have worked on the muon trigger software for ATLAS experiment and have attended and presented at the HLT UK meetings. |
Collaborator Contribution | ATLAS has held training exercises in the software and supplied access to data and meta data crucial for the analysis I'm on/ |
Impact | DOI: 10.1007/JHEP03(2018)009 |
Start Year | 2015 |
Description | ATLAS Underground tours |
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 took groups from the public on a tour of the ATLAS visitor service and then down into the experimental cavern when the LHC was in shutdown |
Year(s) Of Engagement Activity | 2017 |
Description | Manchester Science Festival |
Form Of Engagement Activity | Participation in an activity, workshop or similar |
Part Of Official Scheme? | No |
Geographic Reach | Local |
Primary Audience | Public/other audiences |
Results and Impact | I operated a stand at the Manchester Science Festival about cosmics rays. It was designed to inform and spark interest. I answered questions from school children to old age pensioners. |
Year(s) Of Engagement Activity | 2015 |
Description | Pint of Science Manchester |
Form Of Engagement Activity | Participation in an activity, workshop or similar |
Part Of Official Scheme? | No |
Geographic Reach | Local |
Primary Audience | Public/other audiences |
Results and Impact | I helped organise an event where speakers would come and talk about their research in a way that the general public would find accessible. |
Year(s) Of Engagement Activity | 2016 |