Quasireal Compton scattering measurement and e* scattering with DELCO at PEP

Program Document · Wed Jun 13 00:00:00 EDT 2018

OSTI ID:1447768

Bonneaud, G.

We report on a measurement of the elastic scattering of quasi-real photons generated by one beam with the particles of the other in e⁺e^- interactions at $$\sqrt{s}$$ = 29 GeV performed using the DELCO detector at PEP. The events are characterized by coplanar and anti-tagged ey pairs with large visible energy where the charge of the electron is correlated with the acolinearity angle. We also use our result to search for the on-shell production of a hypothetical excited electron e*. We find that the data agree well with the predictions for the QED Compton process, and set upper limits on the e*eγ coupling parameter λ to be below 10^-2 (95% C.L.) in the range 15 ≲ M_e* 27 GeV.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1447768
• Report Number(s): SLAC-PUB-3748
• Country of Publication: United States
• Language: English