Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at s $$ \sqrt{\mathrm{s}} $$ =13 TeV
Abstract A search for heavy neutral leptons (HNLs), the right-handed Dirac or Majorana neutrinos, is performed in final states with three charged leptons (electrons or muons) using proton-proton collision data collected by the CMS experiment at...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2022
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| Online Access: | https://hdl.handle.net/1721.1/144005 |
| _version_ | 1826197536178700288 |
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| author | Tumasyan, A. Adam, W. Andrejkovic, J. W. Bergauer, T. Chatterjee, S. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Frühwirth, R. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. Pitters, F. M. Schieck, J. Schöfbeck, R. |
| 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. Frühwirth, R. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. Pitters, F. M. Schieck, J. Schöfbeck, R. |
| author_sort | Tumasyan, A. |
| collection | MIT |
| description | Abstract
A search for heavy neutral leptons (HNLs), the right-handed Dirac or Majorana neutrinos, is performed in final states with three charged leptons (electrons or muons) using proton-proton collision data collected by the CMS experiment at
s
$$ \sqrt{s} $$
= 13 TeV at the CERN LHC. The data correspond to an integrated luminosity of 138 fb−1. The HNLs could be produced through mixing with standard model neutrinos ν. For small values of the HNL mass (<20 GeV) and the square of the HNL-ν mixing parameter (10−7–10−2), the decay length of these particles can be large enough so that the secondary vertex of the HNL decay can be resolved with the CMS silicon tracker. The selected final state consists of one lepton emerging from the primary proton-proton collision vertex, and two leptons forming a displaced, secondary vertex. No significant deviations from the standard model expectations are observed, and constraints are obtained on the HNL mass and coupling strength parameters, excluding previously unexplored regions of parameter space in the mass range 1–20 GeV and squared mixing parameter values as low as 10−7. |
| first_indexed | 2024-09-23T10:49:11Z |
| format | Article |
| id | mit-1721.1/144005 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:49:11Z |
| publishDate | 2022 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1440052023-12-07T18:22:49Z Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at s $$ \sqrt{\mathrm{s}} $$ =13 TeV Tumasyan, A. Adam, W. Andrejkovic, J. W. Bergauer, T. Chatterjee, S. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Frühwirth, R. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. Pitters, F. M. Schieck, J. Schöfbeck, R. Massachusetts Institute of Technology. Department of Physics Abstract A search for heavy neutral leptons (HNLs), the right-handed Dirac or Majorana neutrinos, is performed in final states with three charged leptons (electrons or muons) using proton-proton collision data collected by the CMS experiment at s $$ \sqrt{s} $$ = 13 TeV at the CERN LHC. The data correspond to an integrated luminosity of 138 fb−1. The HNLs could be produced through mixing with standard model neutrinos ν. For small values of the HNL mass (<20 GeV) and the square of the HNL-ν mixing parameter (10−7–10−2), the decay length of these particles can be large enough so that the secondary vertex of the HNL decay can be resolved with the CMS silicon tracker. The selected final state consists of one lepton emerging from the primary proton-proton collision vertex, and two leptons forming a displaced, secondary vertex. No significant deviations from the standard model expectations are observed, and constraints are obtained on the HNL mass and coupling strength parameters, excluding previously unexplored regions of parameter space in the mass range 1–20 GeV and squared mixing parameter values as low as 10−7. 2022-07-25T12:35:52Z 2022-07-25T12:35:52Z 2022-07-14 2022-07-24T03:11:46Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/144005 Journal of High Energy Physics. 2022 Jul 14;2022(7):81 PUBLISHER_CC en https://doi.org/10.1007/JHEP07(2022)081 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. Frühwirth, R. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. Pitters, F. M. Schieck, J. Schöfbeck, R. Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at s $$ \sqrt{\mathrm{s}} $$ =13 TeV |
| title | Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at s $$ \sqrt{\mathrm{s}} $$ =13 TeV |
| title_full | Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at s $$ \sqrt{\mathrm{s}} $$ =13 TeV |
| title_fullStr | Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at s $$ \sqrt{\mathrm{s}} $$ =13 TeV |
| title_full_unstemmed | Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at s $$ \sqrt{\mathrm{s}} $$ =13 TeV |
| title_short | Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at s $$ \sqrt{\mathrm{s}} $$ =13 TeV |
| title_sort | search for long lived heavy neutral leptons with displaced vertices in proton proton collisions at s sqrt mathrm s 13 tev |
| url | https://hdl.handle.net/1721.1/144005 |
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