2000/12/08 by Jiawei Zhao, J. W. Zhao, Zhao, Jiawei
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Particle physics theoretical and experimental studies #hep-ph #hep-th
paper · pdf · doi:10.48550/arxiv.hep-ph/0012095
The change in the list of authors has been made. L3 Collaboration: http://hpl3sn02.cern.ch
openalex publication_date 2000/12/08 · arxiv created 2002/04/06 · arxiv updated 2009/11/30 · openalex created_date 2020/10/01 · openalex updated_date 2026/07/28
The measurements of the QED reaction \EEGG performed with the L3 detector are used to search for new physics phenomena beyond the Standard Model. No evidence for these phenomena is found and new limits on their parameters are set. First the reaction is used to constrain a model of an excited electron and second to study contact interactions. The total and differential cross sections for the process \EEGG , are measured at energies from 91 GeV to 202 GeV using the data collected with the L3 detector from 1991 to 1999. The L3 data set lower limits on the mass of an excited electron \MESTAR > 402 GeV, on the QED cutoff parameters \LAMP > 415 GeV, \LAMM > 258 GeV and on the contact interaction energy scale Λ> 1687 GeV. The last parameter limits the size of the interaction area to R < 1.17× 10-17 cm. Some limits on the string and quantum gravity scales are also discussed.