MPHIL: Finite Monopole solutions in BSM models, inspired from the Born-Infeld action, and light monopole solutions accessible at current and future c
Lead Research Organisation:
King's College London
Department Name: Physics
Abstract
I investigated finite energy dyon solutions in the Born-Infeld extensions to the Standard Model and derived predictions for future collider searches.
It was observed that the Born-Infeld extension in the hypercharge sector renders the ChoMaison monopole finite (arXiv 1702.04068v1). I extended this work, showing that a finite dyon solution also exists.
Cho and Maison's original solutions to the equations of motion are not accurate in the monopole core, but a correction has been published (arXiv:1812.00495v1) in the monopole case. I have shown that a similar correction holds in the dyon case with a Born-Infeld hypercharge term.
I also showed that, when the SU(2)xU(1) gauge sectors take the BI form, the equations of motion solve to any arbitrary order in the perturbative expansion where the BI parameter is large compared with the gauge field strengths. At each order, the energy of the soliton (monopole or dyon) divergences due to contributions from the hypercharge sector. It proved too complicated to sthat this becomes finite to all orders, just as in (arXiv 1702.04068v1).
This research is relevant to the experimental searches of the MoEDAL Collaboration which I also participate in. I developed a theoretical model for generic monopole production by photon fusion and Drell-Yan processes, was involved in Madgraph simulations of the production of spin 0, 1/2 and 1 monopoles in which a dipole moment term is included as a new parameter. In collaboration with a Postdoctorate researcher at the Instituto de Fisica Corpuscular in Valencia, we created a full simulation of these particle processes within the Madgraph Monte Carlo and have published the work.
In the next stage of my PhD, I am investigating different methods of generating Starobinsky like inflation models using N=1 supergravity with no scale supersymmetry breaking. This involves a literature review and assessment of current progress in this area, and searching for a question of my own to investigate
It was observed that the Born-Infeld extension in the hypercharge sector renders the ChoMaison monopole finite (arXiv 1702.04068v1). I extended this work, showing that a finite dyon solution also exists.
Cho and Maison's original solutions to the equations of motion are not accurate in the monopole core, but a correction has been published (arXiv:1812.00495v1) in the monopole case. I have shown that a similar correction holds in the dyon case with a Born-Infeld hypercharge term.
I also showed that, when the SU(2)xU(1) gauge sectors take the BI form, the equations of motion solve to any arbitrary order in the perturbative expansion where the BI parameter is large compared with the gauge field strengths. At each order, the energy of the soliton (monopole or dyon) divergences due to contributions from the hypercharge sector. It proved too complicated to sthat this becomes finite to all orders, just as in (arXiv 1702.04068v1).
This research is relevant to the experimental searches of the MoEDAL Collaboration which I also participate in. I developed a theoretical model for generic monopole production by photon fusion and Drell-Yan processes, was involved in Madgraph simulations of the production of spin 0, 1/2 and 1 monopoles in which a dipole moment term is included as a new parameter. In collaboration with a Postdoctorate researcher at the Instituto de Fisica Corpuscular in Valencia, we created a full simulation of these particle processes within the Madgraph Monte Carlo and have published the work.
In the next stage of my PhD, I am investigating different methods of generating Starobinsky like inflation models using N=1 supergravity with no scale supersymmetry breaking. This involves a literature review and assessment of current progress in this area, and searching for a question of my own to investigate
People |
ORCID iD |
| Nikolaos Mavromatos (Primary Supervisor) | |
| Stephanie Baines (Student) |
Studentship Projects
| Project Reference | Relationship | Related To | Start | End | Student Name |
|---|---|---|---|---|---|
| ST/R504853/1 | 01/10/2017 | 30/09/2021 | |||
| 1951142 | Studentship | ST/R504853/1 | 01/10/2017 | 01/07/2020 | Stephanie Baines |
| Title | Monopole Modelling in Madgraph Monte Carlo |
| Description | Monopole modelling in Monte Carlo generators enable scientists do develop models of how they might see physics appearing in collider type experiments. They can use these models in searches by inputting the specifics of their experiment (parameters of the collider experiment) and gain an idea of what to search for in the data collected in collider, and compare the results to theoretical predictions. |
| Type Of Material | Computer model/algorithm |
| Year Produced | 2018 |
| Provided To Others? | Yes |
| Impact | This modelling program has enabled scientists at MoEDAL at CERN in Geneva to improve considerably the parameter space for monopole searches by tightening mass constrains. |
| Description | MoEDAL Collaboration CERN |
| Organisation | European Organization for Nuclear Research (CERN) |
| Department | CERN - Other |
| Country | Switzerland |
| Sector | Academic/University |
| PI Contribution | I designed the theory and co-designed the modelling software (monopoles in Madgraph Monte Carlo) they use to search for monopoles in this experiment at the Large Hadron Collider. I helped with monopole searches by spending time on the SQUID in Zurich. I participated in collaboration meetings and conferences. |
| Collaborator Contribution | The collaboration works as a unit on an experiment at the Large Hadron Collider at CERN. |
| Impact | It is a multidisciplinary collaboration of high energy theorists and experimentalist, and technicians. Technicians are really important! The outputs are contained in the following publications. I alone wrote this: S. Baines, Effective Field Theory Treatment of Monopole Production by Drell-Yan and Photon Fusion for Various Spins, MDPI Proc. 13 (2019) no.1, 1, arXiv:1905.09192 [hep-ph], DOI: 10.3390/proceedings2019013001 Myself, my supervisor at the time and two experimental collaborators were involved in: S. Baines, N.E. Mavromatos, V.A. Mitsou, J.L. Pinfold, A. Santra, Monopole production via photon fusion and Drell-Yan processes: MadGraph implementation and perturbativity via velocity-dependent coupling and magnetic moment as novel features, Eur.Phys.J. C78 (2018) no.11, 966, arXiv:1808.08942 [hep-ph], DOI: 10.1140/epjc/s10052-019-6678-7, 10.1140/epjc/s10052-018-6440-6 All members of the collaboration are involved in these: MoEDAL Collaboration, Magnetic Monopole Search with the Full MoEDAL Trapping Detector in 13 TeV pp Collisions Interpreted in Photon-Fusion and Drell-Yan Production, Phys.Rev.Lett. 123 (2019) no.2, 021802, arXiv:1903.08491 [hep-ex]. DOI: 10.1103/PhysRevLett.123.021802 MoEDAL Collaboration, Search for magnetic monopoles with the MoEDAL forward trapping detector in 2.11 fb-1 of 13 TeV proton-proton collisions at the LHC, Phys.Lett. B782 (2018) 510-516, arXiv:1712.09849v2 [hep-ex]. DOI: 10.1016/j.physletb.2018.05.069 MoEDAL Collaboration, Search for magnetic monopoles with the MoEDAL forward trapping detector in 13 TeV proton-proton collisions at the LHC, Phys. Rev. Lett. 118 (2017) no.6, 061801, arXiv:1611.06817v2 [hep-ex]. DOI: 10.1103/PhysRevLett.118.061801 |
| Start Year | 2017 |
| Description | Ada Lovelace day |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | National |
| Primary Audience | Professional Practitioners |
| Results and Impact | Ada Lovelace events celebrate women in physics. It is a day of remembrance of the first women entering the field and a day to look towards more inclusion and less discrimination. I spoke at the Ada Lovelace day in Manchester University. |
| Year(s) Of Engagement Activity | 2018 |
| Description | Cosmic Origami - Science Gallery London |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | Showing the general public how origami has taught scientists about the complex structures of the cosmos. The mathematical beauty behind origami is the same as the mathematics that describes the chaotic large scale structures of the universe. This was at the London Science museum and reached a few hundred people. I personally made contact with a member of the public who is in arts and hope to one day do a combined science/arts project. |
| Year(s) Of Engagement Activity | 2019 |
| URL | https://london.sciencegallery.com/events/dark-matter-cosmic-origami-workshop |
| Description | Pint of Science |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | Local |
| Primary Audience | Public/other audiences |
| Results and Impact | Pint of Science is an outreach event organisation that aims to put on several talks from academia for the public. Each night, 10-30 people can attend. I organised Pint of Science London for King's College in spring 2018 and presented on high energy physics at the opening night. The public were also given the opportunity to speak with us after the talks and ask questions. |
| Year(s) Of Engagement Activity | 2018 |
| URL | https://pintofscience.co.uk/city/london |