Search for heavy Majorana neutrinos in e±e±+ jets and e± μ ±+ jets events in proton-proton collisions at s = 8 √s=8 TeV
© CERN, for the benefit of the CMS Collaboration. A search is performed for heavy Majorana neutrinos (N) decaying into a W boson and a lepton using the CMS detector at the Large Hadron Collider. A signature of two jets and either two same sign electrons or a same sign electron-muon pair is searched...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Science and Business Media LLC
2021
|
| Online Access: | https://hdl.handle.net/1721.1/134296 |
| _version_ | 1826190797073022976 |
|---|---|
| author | The CMS Collaboration |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics The CMS Collaboration |
| author_sort | The CMS Collaboration |
| collection | MIT |
| description | © CERN, for the benefit of the CMS Collaboration. A search is performed for heavy Majorana neutrinos (N) decaying into a W boson and a lepton using the CMS detector at the Large Hadron Collider. A signature of two jets and either two same sign electrons or a same sign electron-muon pair is searched for using 19.7 fb-1 of data collected during 2012 in proton-proton collisions at a centre-of-mass energy of 8TeV. The data are found to be consistent with the expected standard model (SM) background and, in the context of a Type-1 seesaw mechanism, upper limits are set on the cross section times branching fraction for production of heavy Majorana neutrinos in the mass range between 40 and 500 GeV. The results are additionally interpreted as limits on the mixing between the heavy Majorana neutrinos and the SM neutrinos. In the mass range considered, the upper limits range between 0.00015-0.72 for |VeN|2 and 6.6×10-5-0.47 for |VeNV * µN|2/(|VeN|2+|VµN|2), where V ℓN is the mixing element describing the mixing of the heavy neutrino with the SM neutrino of flavour ℓ. These limits are the most restrictive direct limits for heavy Majorana neutrino masses above 200 GeV. |
| first_indexed | 2024-09-23T08:45:49Z |
| format | Article |
| id | mit-1721.1/134296 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:45:49Z |
| publishDate | 2021 |
| publisher | Springer Science and Business Media LLC |
| record_format | dspace |
| spelling | mit-1721.1/1342962023-01-06T17:21:29Z Search for heavy Majorana neutrinos in e±e±+ jets and e± μ ±+ jets events in proton-proton collisions at s = 8 √s=8 TeV The CMS Collaboration Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science © CERN, for the benefit of the CMS Collaboration. A search is performed for heavy Majorana neutrinos (N) decaying into a W boson and a lepton using the CMS detector at the Large Hadron Collider. A signature of two jets and either two same sign electrons or a same sign electron-muon pair is searched for using 19.7 fb-1 of data collected during 2012 in proton-proton collisions at a centre-of-mass energy of 8TeV. The data are found to be consistent with the expected standard model (SM) background and, in the context of a Type-1 seesaw mechanism, upper limits are set on the cross section times branching fraction for production of heavy Majorana neutrinos in the mass range between 40 and 500 GeV. The results are additionally interpreted as limits on the mixing between the heavy Majorana neutrinos and the SM neutrinos. In the mass range considered, the upper limits range between 0.00015-0.72 for |VeN|2 and 6.6×10-5-0.47 for |VeNV * µN|2/(|VeN|2+|VµN|2), where V ℓN is the mixing element describing the mixing of the heavy neutrino with the SM neutrino of flavour ℓ. These limits are the most restrictive direct limits for heavy Majorana neutrino masses above 200 GeV. 2021-10-27T20:04:22Z 2021-10-27T20:04:22Z 2016 2019-05-14T13:16:26Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/134296 en 10.1007/JHEP04(2016)169 Journal of High Energy Physics Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Springer Science and Business Media LLC Springer |
| spellingShingle | The CMS Collaboration Search for heavy Majorana neutrinos in e±e±+ jets and e± μ ±+ jets events in proton-proton collisions at s = 8 √s=8 TeV |
| title | Search for heavy Majorana neutrinos in e±e±+ jets and e± μ ±+ jets events in proton-proton collisions at s = 8 √s=8 TeV |
| title_full | Search for heavy Majorana neutrinos in e±e±+ jets and e± μ ±+ jets events in proton-proton collisions at s = 8 √s=8 TeV |
| title_fullStr | Search for heavy Majorana neutrinos in e±e±+ jets and e± μ ±+ jets events in proton-proton collisions at s = 8 √s=8 TeV |
| title_full_unstemmed | Search for heavy Majorana neutrinos in e±e±+ jets and e± μ ±+ jets events in proton-proton collisions at s = 8 √s=8 TeV |
| title_short | Search for heavy Majorana neutrinos in e±e±+ jets and e± μ ±+ jets events in proton-proton collisions at s = 8 √s=8 TeV |
| title_sort | search for heavy majorana neutrinos in e e jets and e μ jets events in proton proton collisions at s 8 √s 8 tev |
| url | https://hdl.handle.net/1721.1/134296 |
| work_keys_str_mv | AT thecmscollaboration searchforheavymajorananeutrinosineejetsandemjetseventsinprotonprotoncollisionsats8s8tev |