Photon isolation and jet substructure
Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2018.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2019
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| Online Access: | http://hdl.handle.net/1721.1/120219 |
| _version_ | 1826205700978638848 |
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| author | Hall, Zachary (Zachary H.) |
| author2 | Jesse Thaler. |
| author_facet | Jesse Thaler. Hall, Zachary (Zachary H.) |
| author_sort | Hall, Zachary (Zachary H.) |
| collection | MIT |
| description | Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2018. |
| first_indexed | 2024-09-23T13:17:12Z |
| format | Thesis |
| id | mit-1721.1/120219 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T13:17:12Z |
| publishDate | 2019 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1202192019-04-12T22:18:55Z Photon isolation and jet substructure Hall, Zachary (Zachary H.) Jesse Thaler. Massachusetts Institute of Technology. Department of Physics. Massachusetts Institute of Technology. Department of Physics. Physics. Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2018. Cataloged from PDF version of thesis. Includes bibliographical references (pages 41-45). We introduce soft drop isolation, a new photon isolation criterion inspired by jet substructure techniques. Soft drop isolation is collinear-safe and is equivalent to Frixione isolation at leading order in the small R limit. However, soft drop isolation has the interesting feature of being democratic, meaning that photons can be treated equivalently to hadrons for initial jet clustering. Taking advantage of this democratic property, we define an isolated photon subjet: a photon that is not isolated from its parent jet but is isolated within its parent subjet after soft drop declustering. The kinematics of this isolated photon subjet can be used to expose the QED splitting function, in which a quark radiates a photon, and we verify this behavior using both a parton shower generator and a perturbative calculation in the collinear limit. by Zachary Hall. S.B. 2019-02-05T15:58:45Z 2019-02-05T15:58:45Z 2018 2018 Thesis http://hdl.handle.net/1721.1/120219 1082867284 eng MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 45 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Physics. Hall, Zachary (Zachary H.) Photon isolation and jet substructure |
| title | Photon isolation and jet substructure |
| title_full | Photon isolation and jet substructure |
| title_fullStr | Photon isolation and jet substructure |
| title_full_unstemmed | Photon isolation and jet substructure |
| title_short | Photon isolation and jet substructure |
| title_sort | photon isolation and jet substructure |
| topic | Physics. |
| url | http://hdl.handle.net/1721.1/120219 |
| work_keys_str_mv | AT hallzacharyzacharyh photonisolationandjetsubstructure |