Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s = 13 TeV
Abstract A search for long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters is presented. The search is based on a data sample of proton-proton collisions at...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2023
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| Online Access: | https://hdl.handle.net/1721.1/152181 |
| _version_ | 1826194860879642624 |
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| author | Tumasyan, A. Adam, W. Andrejkovic, J. W. Bergauer, T. Chatterjee, S. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Hussain, P. S. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. Schieck, J. Schöfbeck, R. Schwarz, D. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Tumasyan, A. Adam, W. Andrejkovic, J. W. Bergauer, T. Chatterjee, S. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Hussain, P. S. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. Schieck, J. Schöfbeck, R. Schwarz, D. |
| author_sort | Tumasyan, A. |
| collection | MIT |
| description | Abstract
A search for long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters is presented. The search is based on a data sample of proton-proton collisions at
s
$$ \sqrt{s} $$
= 13 TeV recorded with the CMS detector at the LHC in 2016–2018, corresponding to an integrated luminosity of 138 fb−1. A novel technique, using nearly trackless and out-of-time jet information combined in a deep neural network discriminator, is employed to identify decays of long-lived particles. The results are interpreted in a simplified model of chargino-neutralino production, where the neutralino is the next-to-lightest supersymmetric particle, is long-lived, and decays to a gravitino and either a Higgs or Z boson. This search is most sensitive to neutralino proper decay lengths of approximately 0.5 m, for which masses up to 1.18 TeV are excluded at 95% confidence level. The current search is the best result to date in the mass range from the kinematic limit imposed by the Higgs boson mass up to 1.8 TeV. |
| first_indexed | 2024-09-23T10:03:19Z |
| format | Article |
| id | mit-1721.1/152181 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:03:19Z |
| publishDate | 2023 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1521812024-02-05T18:11:41Z Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s = 13 TeV Tumasyan, A. Adam, W. Andrejkovic, J. W. Bergauer, T. Chatterjee, S. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Hussain, P. S. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. Schieck, J. Schöfbeck, R. Schwarz, D. Massachusetts Institute of Technology. Department of Physics Abstract A search for long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters is presented. The search is based on a data sample of proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV recorded with the CMS detector at the LHC in 2016–2018, corresponding to an integrated luminosity of 138 fb−1. A novel technique, using nearly trackless and out-of-time jet information combined in a deep neural network discriminator, is employed to identify decays of long-lived particles. The results are interpreted in a simplified model of chargino-neutralino production, where the neutralino is the next-to-lightest supersymmetric particle, is long-lived, and decays to a gravitino and either a Higgs or Z boson. This search is most sensitive to neutralino proper decay lengths of approximately 0.5 m, for which masses up to 1.18 TeV are excluded at 95% confidence level. The current search is the best result to date in the mass range from the kinematic limit imposed by the Higgs boson mass up to 1.8 TeV. 2023-09-20T18:32:38Z 2023-09-20T18:32:38Z 2023-07-27 2023-08-06T03:12:20Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/152181 Journal of High Energy Physics. 2023 Jul 27;2023(7):210 PUBLISHER_CC en https://doi.org/10.1007/JHEP07(2023)210 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Tumasyan, A. Adam, W. Andrejkovic, J. W. Bergauer, T. Chatterjee, S. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Hussain, P. S. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. Schieck, J. Schöfbeck, R. Schwarz, D. Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s = 13 TeV |
| title | Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s = 13 TeV |
| title_full | Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s = 13 TeV |
| title_fullStr | Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s = 13 TeV |
| title_full_unstemmed | Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s = 13 TeV |
| title_short | Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s = 13 TeV |
| title_sort | search for long lived particles using out of time trackless jets in proton proton collisions at √s 13 tev |
| url | https://hdl.handle.net/1721.1/152181 |
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