Charged fermions below 100 GeV
Abstract How light can a fermion be if it has unit electric charge? We revisit the lore that LEP robustly excludes charged fermions lighter than about 100 GeV. We review LEP chargino searches, and find them to exclude charged fermions lighter than 90 GeV, assuming a higgsino-like cross section. Howe...
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doaj-a9fdcb6fb62345bfb02b9ce5b162efa22020-11-25T02:16:48ZengSpringerOpenJournal of High Energy Physics1029-84792018-05-012018512710.1007/JHEP05(2018)012Charged fermions below 100 GeVDaniel Egana-Ugrinovic0Matthew Low1Joshua T. Ruderman2C.N. Yang Institute for Theoretical Physics, Stony Brook UniversitySchool of Natural Sciences, Institute for Advanced StudyCenter for Cosmology and Particle Physics, Department of Physics, New York UniversityAbstract How light can a fermion be if it has unit electric charge? We revisit the lore that LEP robustly excludes charged fermions lighter than about 100 GeV. We review LEP chargino searches, and find them to exclude charged fermions lighter than 90 GeV, assuming a higgsino-like cross section. However, if the charged fermion couples to a new scalar, destructive interference among production channels can lower the LEP cross section by a factor of 3. In this case, we find that charged fermions as light as 75 GeV can evade LEP bounds, while remaining consistent with constraints from the LHC. As the LHC collects more data, charged fermions in the 75–100 GeV mass range serve as a target for future monojet and disappearing track searches.http://link.springer.com/article/10.1007/JHEP05(2018)012Beyond Standard ModelSupersymmetric Standard Model |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Daniel Egana-Ugrinovic Matthew Low Joshua T. Ruderman |
spellingShingle |
Daniel Egana-Ugrinovic Matthew Low Joshua T. Ruderman Charged fermions below 100 GeV Journal of High Energy Physics Beyond Standard Model Supersymmetric Standard Model |
author_facet |
Daniel Egana-Ugrinovic Matthew Low Joshua T. Ruderman |
author_sort |
Daniel Egana-Ugrinovic |
title |
Charged fermions below 100 GeV |
title_short |
Charged fermions below 100 GeV |
title_full |
Charged fermions below 100 GeV |
title_fullStr |
Charged fermions below 100 GeV |
title_full_unstemmed |
Charged fermions below 100 GeV |
title_sort |
charged fermions below 100 gev |
publisher |
SpringerOpen |
series |
Journal of High Energy Physics |
issn |
1029-8479 |
publishDate |
2018-05-01 |
description |
Abstract How light can a fermion be if it has unit electric charge? We revisit the lore that LEP robustly excludes charged fermions lighter than about 100 GeV. We review LEP chargino searches, and find them to exclude charged fermions lighter than 90 GeV, assuming a higgsino-like cross section. However, if the charged fermion couples to a new scalar, destructive interference among production channels can lower the LEP cross section by a factor of 3. In this case, we find that charged fermions as light as 75 GeV can evade LEP bounds, while remaining consistent with constraints from the LHC. As the LHC collects more data, charged fermions in the 75–100 GeV mass range serve as a target for future monojet and disappearing track searches. |
topic |
Beyond Standard Model Supersymmetric Standard Model |
url |
http://link.springer.com/article/10.1007/JHEP05(2018)012 |
work_keys_str_mv |
AT danieleganaugrinovic chargedfermionsbelow100gev AT matthewlow chargedfermionsbelow100gev AT joshuatruderman chargedfermionsbelow100gev |
_version_ |
1724888859408334848 |