Search for pairs of scalar leptoquarks decaying into quarks and electrons or muons in √s=13 TeV pp collisions with the ATLAS detector
Saved in:
| Title: | Search for pairs of scalar leptoquarks decaying into quarks and electrons or muons in √s=13 TeV pp collisions with the ATLAS detector |
|---|---|
| Authors: | Jaspan, Adam Elliott |
| Summary: | A search for the pair production of scalar leptoquarks decaying into quarks and leptons is performed, considering final states containing two leptons, and two or more jets. Jet flavour tagging techniques are used to determine the flavour of quark from which the jet has fragmented, including b jet identification using the MV2c10 algorithm, and, for the first time in leptoquark searches, c jet identification using the DL1 algorithm. This search uses 139 fb⁻¹ of √s = 13 TeV pp collisions, recorded with the ATLAS detector in the years 2016-2018. This search is the first test of a new class of leptoquark models, which explicitly includes decay modes to leptons and quarks of differing generations. The number of observed events is found to be in good agreement with known Standard Model processes. Such leptoquark models are found to be incompatible with the observed data to within a 95% confidence level for leptoquark masses of up to 1.7 (1.8) TeV in the muon (electron) channels respectively, assuming a branching fraction (ß) of 1 to charged leptons. These results are also expressed as limits on the branching fraction into charged leptons, with strong exclusions for values of ß > 0.1. Full documentation of this search is presented in Part III. |
| URL: | https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.839470 |
| Database: | OpenDissertations |
| Abstract: | A search for the pair production of scalar leptoquarks decaying into quarks and leptons is performed, considering final states containing two leptons, and two or more jets. Jet flavour tagging techniques are used to determine the flavour of quark from which the jet has fragmented, including b jet identification using the MV2c10 algorithm, and, for the first time in leptoquark searches, c jet identification using the DL1 algorithm. This search uses 139 fb⁻¹ of √s = 13 TeV pp collisions, recorded with the ATLAS detector in the years 2016-2018. This search is the first test of a new class of leptoquark models, which explicitly includes decay modes to leptons and quarks of differing generations. The number of observed events is found to be in good agreement with known Standard Model processes. Such leptoquark models are found to be incompatible with the observed data to within a 95% confidence level for leptoquark masses of up to 1.7 (1.8) TeV in the muon (electron) channels respectively, assuming a branching fraction (ß) of 1 to charged leptons. These results are also expressed as limits on the branching fraction into charged leptons, with strong exclusions for values of ß > 0.1. Full documentation of this search is presented in Part III. |
|---|
