Logo image
返回
A search for an unexpected asymmetry in the production of e+μ− and e−μ+ pairs in proton–proton collisions recorded by the ATLAS detector at s=13 TeV
期刊文章   開放取用(OA)   同儕審查

A search for an unexpected asymmetry in the production of e+μ− and e−μ+ pairs in proton–proton collisions recorded by the ATLAS detector at s=13 TeV

G. Aad, B. Abbott, D.C. Abbott, A. Abed Abud, K. Abeling, D.K. Abhayasinghe, S.H. Abidi, A. Aboulhorma, H. Abramowicz, H. Abreu, …
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 卷.830, 137106
07/2022
DOI: https://doi.org/10.1016/j.physletb.2022.137106

摘要

Nuclear and High Energy Physics
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 139fb −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 1R eu =g 1R μc =1, at 95% confidence level. The limit on the coupling reduces to g 1R eu =g 1R μc =0.46 for a mass of 1420 GeV.

檔案與連結 (1)

url
https://doi.org/10.1016/j.physletb.2022.137106檢視
已出版(紀錄版本) 開放

相關連結

指標

1 檢視次數

詳細資料

Logo image