Effective Field Theory for jet substructure in heavy ion collisions
Abstract I develop an Effective Field Theory (EFT) framework to compute jet substructure observables for heavy ion collision experiments. As an example, I consider dijet events that accompany the formation of a weakly coupled long lived Quark Gluon Plasma (QGP)...
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| Format: | Article |
| Language: | English |
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Springer Berlin Heidelberg
2021
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| Online Access: | https://hdl.handle.net/1721.1/138130 |
| _version_ | 1826188556855410688 |
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| author | Vaidya, Varun |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Vaidya, Varun |
| author_sort | Vaidya, Varun |
| collection | MIT |
| description | Abstract
I develop an Effective Field Theory (EFT) framework to compute jet substructure observables for heavy ion collision experiments. As an example, I consider dijet events that accompany the formation of a weakly coupled long lived Quark Gluon Plasma (QGP) medium in a heavy ion collision and look at an observable insensitive to jet selection bias: the simultaneous measurement of jet mass along with the transverse momentum imbalance between the jets that are groomed to remove soft radiation. Treating the jet as an open quantum system, I write down a factorization formula within the SCET (Soft Collinear Effective Theory) framework in the forward scattering regime. The physics of the medium is encoded in a universal soft field correlator while the jet-medium interaction is captured by a medium induced jet function. The factorization formula leads to a Lindblad type equation for the evolution of the reduced density matrix of the jet in the Markovian approximation. The solution for this equation allows a resummation of large logarithms that arise due to the final state measurements imposed while simultaneously summing over multiple incoherent interactions of the jet with the medium. |
| first_indexed | 2024-09-23T08:01:33Z |
| format | Article |
| id | mit-1721.1/138130 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:01:33Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1381302023-07-28T20:51:17Z Effective Field Theory for jet substructure in heavy ion collisions Vaidya, Varun Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Abstract I develop an Effective Field Theory (EFT) framework to compute jet substructure observables for heavy ion collision experiments. As an example, I consider dijet events that accompany the formation of a weakly coupled long lived Quark Gluon Plasma (QGP) medium in a heavy ion collision and look at an observable insensitive to jet selection bias: the simultaneous measurement of jet mass along with the transverse momentum imbalance between the jets that are groomed to remove soft radiation. Treating the jet as an open quantum system, I write down a factorization formula within the SCET (Soft Collinear Effective Theory) framework in the forward scattering regime. The physics of the medium is encoded in a universal soft field correlator while the jet-medium interaction is captured by a medium induced jet function. The factorization formula leads to a Lindblad type equation for the evolution of the reduced density matrix of the jet in the Markovian approximation. The solution for this equation allows a resummation of large logarithms that arise due to the final state measurements imposed while simultaneously summing over multiple incoherent interactions of the jet with the medium. 2021-11-15T13:04:49Z 2021-11-15T13:04:49Z 2021-11-10 2021-11-14T04:13:08Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/138130 Journal of High Energy Physics. 2021 Nov 10;2021(11):64 PUBLISHER_CC en https://doi.org/10.1007/JHEP11(2021)064 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Vaidya, Varun Effective Field Theory for jet substructure in heavy ion collisions |
| title | Effective Field Theory for jet substructure in heavy ion collisions |
| title_full | Effective Field Theory for jet substructure in heavy ion collisions |
| title_fullStr | Effective Field Theory for jet substructure in heavy ion collisions |
| title_full_unstemmed | Effective Field Theory for jet substructure in heavy ion collisions |
| title_short | Effective Field Theory for jet substructure in heavy ion collisions |
| title_sort | effective field theory for jet substructure in heavy ion collisions |
| url | https://hdl.handle.net/1721.1/138130 |
| work_keys_str_mv | AT vaidyavarun effectivefieldtheoryforjetsubstructureinheavyioncollisions |