Studying the validity of the ABCDisCo method of filtering QCD Instanton events from multiple perturbative background theories
Yang-Mills theories within the Standard Model of particle physics predict topologically non-trivial objects which describe the tunnelling between classically degenerate vacuum states in Minkowski spacetime. Though predicted theoretically as long ago as the 1960’s, no experimental evidence for these...
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| Format: | Working paper |
| Language: | English |
| Published: |
2022
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| Summary: | Yang-Mills theories within the Standard Model of particle physics predict topologically non-trivial objects which describe the tunnelling between classically degenerate vacuum states in Minkowski spacetime. Though predicted theoretically as long ago as the 1960’s, no experimental evidence for these objects has yet been found. One example of such objects – known as “QCD (quantum chromodynamic) Instantons” – should be frequently created at the Large Hadron Collider, but are still to be identified from the existing data as they are eclipsed by large numbers of background events. This work aimed to deploy the ABCDisCo [1] method of filtering Instanton events from background events on simulated and real experimental data samples. It will also appraise the extent to which the performance of Machine Learning algorithms (neural networks) employed by this method is insensitive to changes in the expected theoretical behavior of the perturbative QCD backgrounds. |
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