Search for a scalar partner of the top quark in the all-hadronic tt¯ plus missing transverse momentum final state at ?s=13 TeV with the ATLAS detector
| dc.authorid | 0000-0001-5050-8441 | en_US |
| dc.contributor.author | Çetin, Serkant Ali | |
| dc.contributor.author | Çelebi, Emre | |
| dc.date.accessioned | 2021-05-07T13:56:30Z | |
| dc.date.available | 2021-05-07T13:56:30Z | |
| dc.date.issued | 2020-08-01 | |
| dc.department | Fakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümü | en_US |
| dc.description.abstract | A search for direct pair production of scalar partners of the top quark (top squarks or scalar third-generation up-type leptoquarks) in the all-hadronic tt¯ plus missing transverse momentum final state is presented. The analysis of 139 fb - 1 of s=13 TeV proton–proton collision data collected using the ATLAS detector at the LHC yields no significant excess over the Standard Model background expectation. To interpret the results, a supersymmetric model is used where the top squark decays via t~?t(?)?~10, with t(?) denoting an on-shell (off-shell) top quark and ?~10 the lightest neutralino. Three specific event selections are optimised for the following scenarios. In the scenario where mt~>mt+m?~10, top squark masses are excluded in the range 400–1250 GeV for ?~10 masses below 200 GeV at 95% confidence level. In the situation where mt~?mt+m?~10, top squark masses in the range 300–630 GeV are excluded, while in the case where mt~<mW+mb+m?~10 (with mt~-m?~10?5 GeV), considered for the first time in an ATLAS all-hadronic search, top squark masses in the range 300–660 GeV are excluded. Limits are also set for scalar third-generation up-type leptoquarks, excluding leptoquarks with masses below 1240 GeV when considering only leptoquark decays into a top quark and a neutrino. | en_US |
| dc.fullTextLevel | Full Text | en_US |
| dc.identifier.doi | 10.1140/epjc/s10052-020-8102-8 | |
| dc.identifier.issn | 1434-6044 | |
| dc.identifier.scopus | 2-s2.0-85090049230 | en_US |
| dc.identifier.uri | https://hdl.handle.net/11411/3652 | |
| dc.identifier.uri | https://doi.org/10.1140/epjc/s10052-020-8102-8 | |
| dc.identifier.wos | WOS:000639389400002 | en_US |
| dc.identifier.wosquality | Q1 | en_US |
| dc.indekslendigikaynak | Web of Science | en_US |
| dc.indekslendigikaynak | Scopus | en_US |
| dc.issue | 8 | en_US |
| dc.language.iso | en | en_US |
| dc.national | International | en_US |
| dc.numberofauthors | 100+ | en_US |
| dc.pages | 16072 | en_US |
| dc.publisher | Springer | en_US |
| dc.relation.ispartof | European Physical Journal C | en_US |
| dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
| dc.rights | info:eu-repo/semantics/openAccess | en_US |
| dc.title | Search for a scalar partner of the top quark in the all-hadronic tt¯ plus missing transverse momentum final state at ?s=13 TeV with the ATLAS detector | |
| dc.type | Article | |
| dc.volume | 80 | en_US |
