Search for excited and exotic electrons in the $e \gamma$ decay channel in $p \bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV

Acosta, D.

doi:10.1103/PhysRevLett.94.101802

Search for excited and exotic electrons in the $$e \gamma$$ decay channel in $$p \bar{p}$$ collisions at $$\sqrt{s} = 1.96$$ TeV

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Phys.Rev.Lett.

DOI:https://doi.org/10.1103/PhysRevLett.94.101802· OSTI ID:1847811

Acosta, D.

We present a search for excited and exotic electrons (e*) decaying to an electron and a photon, both with high transverse momentum. We use 202/pb of data collected in p-pbar collisions at sqrt(s) = 1.96 TeV with the CDF II detector. No signal above Standard Model expectation is seen for associated ee* production. We discuss the e* sensitivity in the parameter space of the excited electron mass M(e*) and the compositeness energy scale Lambda. In the contact interaction model, we exclude 132 < M(e*) < 879 GeV/c^2 for Lambda = M(e*) at 95% confidence level (C.L.). In the gauge-mediated model, we exclude 126 < M(e*) < 430 GeV/c^2 at 95% C.L. for the phenomenological coupling f/Lambda ~ 0.01/GeV.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: CDF

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1847811

Report Number(s):: FERMILAB-PUB-04-287-E; arXiv:hep-ex/0410013; oai:inspirehep.net:661115

Journal Information:: Phys.Rev.Lett., Journal Name: Phys.Rev.Lett. Vol. 94

Country of Publication:: United States

Language:: English

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