Search for excited electrons in ppbar collisions at sqrt(s) = 1.96 TeV

Collaboration, D0 and Bertram, Iain and Borissov, Guennadi and Fox, Harald and Williams, Mark and Ratoff, Peter and Love, Peter and Rakitin, Alexander and Sopczak, Andre (2008) Search for excited electrons in ppbar collisions at sqrt(s) = 1.96 TeV. Physical Review D, 77 (9): 091102(R). ISSN 1550-7998

[thumbnail of paper_098.pdf]
paper_098.pdf - Published Version

Download (378kB)


We present the results of a search for the production of an excited state of the electron, e*, in proton-antiproton collisions at sqrt(s) = 1.96 TeV. The data were collected with the D0 experiment at the Fermilab Tevatron Collider and correspond to an integrated luminosity of approximately 1 fb^-1. We search for e* in the process ppbar -> e* e, with the e* subsequently decaying to an electron plus photon. No excess above the standard model background is observed. Interpreting our data in the context of a model that describes e* production by four-fermion contact interactions and e* decay via electroweak processes, we set 95% C.L. upper limits on the production cross section ranging from 8.9 fb to 27 fb, depending on the mass of the excited electron. Choosing the scale for contact interactions to be Lambda = 1 TeV, excited electron masses below 756 GeV are excluded at the 95% C.L.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
Additional Information:
© 2008 The American Physical Society 8 pages, 5 figures, submitted to Phys.Rev.D Rap.Comm
ID Code:
Deposited By:
Deposited On:
29 Apr 2013 14:07
Last Modified:
23 Jan 2024 01:48