Exotic decays of top partners with charge 5/3: bounds and opportunities
Abstract Exotic decays of top partners in new bosons are the norm in realistic models of a composite Higgs. We focus on the custodial charge-5/3 partner, which normally decays exclusively into tW +. The new channels include a colour-sextet, X 5/3 → b ¯ $$ \overline{b} $$ π 6, as well as singly and d...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-10-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP10(2019)134 |
| _version_ | 1818498647507075072 |
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| author | Ke-Pan Xie Giacomo Cacciapaglia Thomas Flacke |
| author_facet | Ke-Pan Xie Giacomo Cacciapaglia Thomas Flacke |
| author_sort | Ke-Pan Xie |
| collection | DOAJ |
| description | Abstract Exotic decays of top partners in new bosons are the norm in realistic models of a composite Higgs. We focus on the custodial charge-5/3 partner, which normally decays exclusively into tW +. The new channels include a colour-sextet, X 5/3 → b ¯ $$ \overline{b} $$ π 6, as well as singly and doubly charged scalars, X 5/3 → t𝜙+, b𝜙++. We use existing same-sign lepton searches to show that the new final states are constrained at the same level as the standard one. At the same time, exotic final states also offer opportunities for improvement: examples include a hard photon in X 5/3 → t𝜙+ → tW + γ decays, and top-rich channels which arises in several exotic X 5/3 decays. |
| first_indexed | 2024-12-10T20:18:25Z |
| format | Article |
| id | doaj.art-6d5c149130264401897a2cbc367c4a33 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-10T20:18:25Z |
| publishDate | 2019-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-6d5c149130264401897a2cbc367c4a332022-12-22T01:35:08ZengSpringerOpenJournal of High Energy Physics1029-84792019-10-0120191012310.1007/JHEP10(2019)134Exotic decays of top partners with charge 5/3: bounds and opportunitiesKe-Pan Xie0Giacomo Cacciapaglia1Thomas Flacke2Center for Theoretical Physics, Department of Physics and Astronomy, Seoul National UniversityUniversity of Lyon, Universit́e Claude Bernard Lyon 1Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS)Abstract Exotic decays of top partners in new bosons are the norm in realistic models of a composite Higgs. We focus on the custodial charge-5/3 partner, which normally decays exclusively into tW +. The new channels include a colour-sextet, X 5/3 → b ¯ $$ \overline{b} $$ π 6, as well as singly and doubly charged scalars, X 5/3 → t𝜙+, b𝜙++. We use existing same-sign lepton searches to show that the new final states are constrained at the same level as the standard one. At the same time, exotic final states also offer opportunities for improvement: examples include a hard photon in X 5/3 → t𝜙+ → tW + γ decays, and top-rich channels which arises in several exotic X 5/3 decays.http://link.springer.com/article/10.1007/JHEP10(2019)134Exoticsvector-like quarksBeyond Standard ModelHadron-Hadron scattering (experiments)same charge top pair |
| spellingShingle | Ke-Pan Xie Giacomo Cacciapaglia Thomas Flacke Exotic decays of top partners with charge 5/3: bounds and opportunities Journal of High Energy Physics Exotics vector-like quarks Beyond Standard Model Hadron-Hadron scattering (experiments) same charge top pair |
| title | Exotic decays of top partners with charge 5/3: bounds and opportunities |
| title_full | Exotic decays of top partners with charge 5/3: bounds and opportunities |
| title_fullStr | Exotic decays of top partners with charge 5/3: bounds and opportunities |
| title_full_unstemmed | Exotic decays of top partners with charge 5/3: bounds and opportunities |
| title_short | Exotic decays of top partners with charge 5/3: bounds and opportunities |
| title_sort | exotic decays of top partners with charge 5 3 bounds and opportunities |
| topic | Exotics vector-like quarks Beyond Standard Model Hadron-Hadron scattering (experiments) same charge top pair |
| url | http://link.springer.com/article/10.1007/JHEP10(2019)134 |
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