dc.contributor.author | Athron, Peter | |
dc.contributor.author | Balázs, Csaba | |
dc.contributor.author | Buckley, Andy | |
dc.contributor.author | Cornell, Jonathan M. | |
dc.contributor.author | Danninger, Matthias | |
dc.contributor.author | Farmer, Ben | |
dc.contributor.author | Fowlie, Andrew | |
dc.contributor.author | Gonzalo, Tomás E. | |
dc.contributor.author | Harz, Julia | |
dc.contributor.author | Jackson, Paul | |
dc.contributor.author | Kudzman-Blais, Rose | |
dc.contributor.author | Kvellestad, Anders | |
dc.contributor.author | Martinez, Gregory D. | |
dc.contributor.author | Petridis, Andreas | |
dc.contributor.author | Raklev, Are | |
dc.contributor.author | Rogan, Christopher | |
dc.contributor.author | Scott, Pat | |
dc.contributor.author | Sharma, Abhishek | |
dc.contributor.author | White, Martin | |
dc.contributor.author | Zhang, Yang | |
dc.date.accessioned | 2021-01-08T21:43:22Z | |
dc.date.available | 2021-01-08T21:43:22Z | |
dc.date.issued | 2019-05-08 | |
dc.identifier.citation | GAMBIT Collaboration:., Athron, P., Balázs, C. et al. Combined collider constraints on neutralinos and charginos. Eur. Phys. J. C 79, 395 (2019). https://doi.org/10.1140/epjc/s10052-019-6837-x | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/31083 | |
dc.description | This work is licensed under a Creative Commons Attribution 4.0 International License. | en_US |
dc.description.abstract | Searches for supersymmetric electroweakinos have entered a crucial phase, as the integrated luminosity of the Large Hadron Collider is now high enough to compensate for their weak production cross-sections. Working in a framework where the neutralinos and charginos are the only light sparticles in the Minimal Supersymmetric Standard Model, we use GAMBIT to perform a detailed likelihood analysis of the electroweakino sector. We focus on the impacts of recent ATLAS and CMS searches with of 13 TeV proton-proton collision data. We also include constraints from LEP and invisible decays of the Z and Higgs bosons. Under the background-only hypothesis, we show that current LHC searches do not robustly exclude any range of neutralino or chargino masses. However, a pattern of excesses in several LHC analyses points towards a possible signal, with neutralino masses of = (8–155, 103–260, 130–473, 219–502) GeV and chargino masses of = (104–259, 224–507) GeV at the 95% confidence level. The lightest neutralino is mostly bino, with a possible modest Higgsino or wino component. We find that this excess has a combined local significance of 3.3𝜎, subject to a number of cautions. If one includes LHC searches for charginos and neutralinos conducted with 8 TeV proton-proton collision data, the local significance is lowered to 2.9𝜎. We briefly consider the implications for dark matter, finding that the correct relic density can be obtained through the Higgs-funnel and Z-funnel mechanisms, even assuming that all other sparticles are decoupled. All samples, GAMBIT input files and best-fit models from this study are available on Zenodo. | en_US |
dc.publisher | SpringerOpen | en_US |
dc.rights | © The Author(s) 2019. | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_US |
dc.title | Combined collider constraints on neutralinos and charginos | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Rogan, Christopher | |
kusw.kudepartment | Physics and Astronomy | en_US |
dc.identifier.doi | 10.1140/epjc/s10052-019-6837-x | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |