A search for excited leptons in pp Collisions at sqrt(s) = 7 TeV
(2011) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 704, p. 143-162 (2011)
Files
pdfdocument.pdf
Restricted Access - Adobe PDF
- 1.33 MB
Details
- Authors
- Abstract
- A search for excited leptons is carried out with the CMS detector at the LHC, using 36 inverse picobarns of pp collision data recorded at sqrt(s) = 7 TeV. The search is performed for associated production of a lepton and an oppositely charged excited lepton pp to l l*, followed by the decay l* to l gamma, resulting in the l l gamma final state, where l = electron or muon. No excess of events above the standard model expectation is observed. Interpreting the findings in the context of l* production through four-fermion contact interactions and subsequent decay via electroweak processes, first upper limits are reported for l* production at this collision energy. The exclusion region in the compositeness scale Lambda and excited lepton mass M(l*) parameter space is extended beyond previously established limits. For Lambda = M(l*), excited lepton masses are excluded below 1070 GeV/c^2 for e* and 1090 GeV/c^2 for mu* at the 95% confidence level.
- Affiliations
- Yerevan Phys. Inst.
Citations
CMS Collaboration, Quertenmont, L., Chatrchyan, S., Basegmez, S., Bruno, G., Caudron, J., Ceard, L., Cortina Gil, E., de Favereau de Jeneret, J., Delaere, C., Favart, D., Forthomme, L., Giammanco, A., Grégoire, G., Hollar, J., Lemaitre, V., Liao, J., Militaru, O., Nuttens, C., et al. (2011). A search for excited leptons in pp Collisions at sqrt(s) = 7 TeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 704, 143-162. https://doi.org/10.1016/j.physletb.2011.09.021 (Original work published 2011)