Search for excited leptons in ℓℓγ final states in proton-proton collisions at √s=13 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2019) Search for excited leptons in ℓℓγ final states in proton-proton collisions at √s=13 TeV. Journal of High Energy Physics, 2019 (4). pp. 1-36. ISSN 1126-6708 E-ISSN 1029-8479

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Abstract

A search is presented for excited electrons and muons in ``γ final states at the LHC. The search is based on a data sample corresponding to an integrated luminosity of 35.9 fb−1 of proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the CMS detector in 2016. This is the first search for excited leptons at √ s = 13 TeV. The observation is consistent with the standard model background prediction, and the most stringent exclusion limits to date are set on the excited lepton mass and the compositeness scale, at 95% confidence level. Excited electrons and muons are excluded for masses below 3.9 and 3.8 TeV, respectively, under the assumption that the excited lepton mass equals the compositeness scale. The best observed limit on the compositeness scale is obtained with an excited lepton mass of around 1.0 TeV, excluding values below 25 TeV for both excited electrons and muons.

Item Type:	Article (Journal)
Additional Information:	7861/72614
Uncontrolled Keywords:	Beyond standard model; Hadron-hadron scattering (experiments)
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	13 Jun 2019 15:57
Last Modified:	13 Jun 2019 15:57
URI:	http://irep.iium.edu.my/id/eprint/72614

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