Detecting highly collimated photon-jets from Higgs boson exotic decays with deep learning
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866929226296328192 |
|---|---|
| author | Ai, Xiaocong Feng, William Y. Hsu, Shih-Chieh Li, Ke Lu, Chih-Ting |
| author_facet | Ai, Xiaocong Feng, William Y. Hsu, Shih-Chieh Li, Ke Lu, Chih-Ting |
| contents | Recently, there has been a growing focus on the search for anomalous objects beyond standard model (BSM) signatures at the Large Hadron Collider (LHC). This study investigates novel signatures involving highly collimated photons, referred to as photon-jets. These photon-jets can be generated from highly boosted BSM particles that decay into two or more collimated photons in the final state. Since these photons cannot be isolated from each other, they are treated as a single jet-like object rather than a multi-photon signature. The Higgs portal model is utilized as a prototype for studying photon-jet signatures. Specifically, GEANT4 is employed to simulate electromagnetic showers in an ATLAS-like electromagnetic calorimeter, and three machine learning techniques: Boosted Decision Trees (BDT), Convolutional Neural Networks (CNN), and Particle Flow Networks (PFN) are applied to effectively distinguish these photon-jet signatures from single photons and neutral pions within the SM backgrounds. Our models attain an identification efficiency exceeding $99\%$ for photon-jets, coupled with a rejection rate surpassing $99\%$ for SM backgrounds. Furthermore, the sensitivities for searching photon-jet signatures from the Higgs boson exotic decays at the High-Luminosity LHC are obtained. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_15690 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Detecting highly collimated photon-jets from Higgs boson exotic decays with deep learning Ai, Xiaocong Feng, William Y. Hsu, Shih-Chieh Li, Ke Lu, Chih-Ting High Energy Physics - Phenomenology High Energy Physics - Experiment Recently, there has been a growing focus on the search for anomalous objects beyond standard model (BSM) signatures at the Large Hadron Collider (LHC). This study investigates novel signatures involving highly collimated photons, referred to as photon-jets. These photon-jets can be generated from highly boosted BSM particles that decay into two or more collimated photons in the final state. Since these photons cannot be isolated from each other, they are treated as a single jet-like object rather than a multi-photon signature. The Higgs portal model is utilized as a prototype for studying photon-jet signatures. Specifically, GEANT4 is employed to simulate electromagnetic showers in an ATLAS-like electromagnetic calorimeter, and three machine learning techniques: Boosted Decision Trees (BDT), Convolutional Neural Networks (CNN), and Particle Flow Networks (PFN) are applied to effectively distinguish these photon-jet signatures from single photons and neutral pions within the SM backgrounds. Our models attain an identification efficiency exceeding $99\%$ for photon-jets, coupled with a rejection rate surpassing $99\%$ for SM backgrounds. Furthermore, the sensitivities for searching photon-jet signatures from the Higgs boson exotic decays at the High-Luminosity LHC are obtained. |
| title | Detecting highly collimated photon-jets from Higgs boson exotic decays with deep learning |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2401.15690 |