A robust measure of event isotropy at colliders
Abstract We introduce a new event shape observable — event isotropy — that quantifies how close the radiation pattern of a collider event is to a uniform distribution. This observable is based on a normalized version of the energy mover’s distance, which is the minimum “work” needed to rearrange...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2021
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| Online Access: | https://hdl.handle.net/1721.1/131942 |
| _version_ | 1826194839161536512 |
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| author | Cesarotti, Cari Thaler, Jesse |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Cesarotti, Cari Thaler, Jesse |
| author_sort | Cesarotti, Cari |
| collection | MIT |
| description | Abstract
We introduce a new event shape observable — event isotropy — that quantifies how close the radiation pattern of a collider event is to a uniform distribution. This observable is based on a normalized version of the energy mover’s distance, which is the minimum “work” needed to rearrange one radiation pattern into another of equal energy. We investigate the utility of event isotropy both at electron-positron colliders, where events are compared to a perfectly spherical radiation pattern, as well as at proton-proton colliders, where the natural comparison is to either cylindrical or ring-like patterns. Compared to traditional event shape observables like sphericity and thrust, event isotropy exhibits a larger dynamic range for high-multiplicity events. This enables event isotropy to not only distinguish between dijet and multijet processes but also separate uniform N-body phase space configurations for different values of N. As a key application of this new observable, we study its performance to characterize strongly-coupled new physics scenarios with isotropic collider signatures. |
| first_indexed | 2024-09-23T10:02:57Z |
| format | Article |
| id | mit-1721.1/131942 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:02:57Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1319422023-12-12T15:42:17Z A robust measure of event isotropy at colliders Cesarotti, Cari Thaler, Jesse Massachusetts Institute of Technology. Center for Theoretical Physics Abstract We introduce a new event shape observable — event isotropy — that quantifies how close the radiation pattern of a collider event is to a uniform distribution. This observable is based on a normalized version of the energy mover’s distance, which is the minimum “work” needed to rearrange one radiation pattern into another of equal energy. We investigate the utility of event isotropy both at electron-positron colliders, where events are compared to a perfectly spherical radiation pattern, as well as at proton-proton colliders, where the natural comparison is to either cylindrical or ring-like patterns. Compared to traditional event shape observables like sphericity and thrust, event isotropy exhibits a larger dynamic range for high-multiplicity events. This enables event isotropy to not only distinguish between dijet and multijet processes but also separate uniform N-body phase space configurations for different values of N. As a key application of this new observable, we study its performance to characterize strongly-coupled new physics scenarios with isotropic collider signatures. 2021-09-20T17:31:03Z 2021-09-20T17:31:03Z 2020-08-19 2020-11-29T04:21:32Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131942 Journal of High Energy Physics. 2020 Aug 19;2020(8):84 PUBLISHER_CC en https://doi.org/10.1007/JHEP08(2020)084 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Cesarotti, Cari Thaler, Jesse A robust measure of event isotropy at colliders |
| title | A robust measure of event isotropy at colliders |
| title_full | A robust measure of event isotropy at colliders |
| title_fullStr | A robust measure of event isotropy at colliders |
| title_full_unstemmed | A robust measure of event isotropy at colliders |
| title_short | A robust measure of event isotropy at colliders |
| title_sort | robust measure of event isotropy at colliders |
| url | https://hdl.handle.net/1721.1/131942 |
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