2004/10/31 by D. Acosta, J. Adelman, A. A. Affolder +97 · 31 citations
Physics and Astronomy · #Algorithm #Atomic physics #Computer science #Excited state #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevlett.94.101802
published in Physical Review Letters 94(10), 101802 (American Physical Society) · 4 figures
arxiv created 2005/02/21 · openalex publication_date 2005/03/16 · arxiv updated 2010/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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^\ensuremath-1 of data collected in pp collisions at √(s)=1.96 TeV with the Collider Detector at Fermilab 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 \ensuremathΛ. In the contact interaction model, we exclude 132 GeV/c2<M_e*<879 GeV/c2 for \ensuremathΛ=M_e* at 95% confidence level (C.L.). In the gauge-mediated model, we exclude 126 GeV/c2<M_e*<430 GeV/c2 at 95% C.L. for the phenomenological coupling f/\ensuremathΛ\ensuremath≈10^\ensuremath-2 GeV^\ensuremath-1.