Projects per year
Abstract
This search, a type not previously performed at ATLAS, uses a comparison of the production cross sections for e+μ− and e−μ+ pairs to constrain physics processes beyond the Standard Model. It uses 139 fb−1 of proton–proton collision data recorded at √s = 13 TeV at the LHC. Targeting sources of new physics which prefer final states containing e+μ− to e−μ+, the search contains two broad signal regions which are used to provide model-independent constraints on the ratio of cross sections at the 2% level. The search also has two special selections targeting supersymmetric models and leptoquark signatures. Observations using one of these selections are able to exclude, at 95% confidence level, singly produced smuons with masses up to 640 GeV in a model in which the only other light sparticle is a neutralino when the R-parity-violating coupling λ′231 is close to unity. Observations using the other selection exclude scalar leptoquarks with masses below 1880 GeV when g eu 1R = gμc 1R = 1, at 95% confidence level. The limit on the coupling reduces to g eu 1R = gμc 1R = 0.46 for a mass of 1420 GeV.
Original language | English |
---|---|
Article number | 137106 |
Pages (from-to) | 1-22 |
Number of pages | 22 |
Journal | Physics Letters B |
Volume | 830 |
DOIs | |
Publication status | Published - 10 Jul 2022 |
Keywords / Materials (for Non-textual outputs)
- EXTENSION
- VIOLATION
- DECAY