NEW RESULTS FROM BHABHA SCATTERING AT 29 GEV

Autor: A. A. Seidl, P. Kesten, B. B. Brabson, C. R. Ng, D.S. Koltick, N. Harnew, F. J. Loeffler, M. Derrick, B. G. Bylsma, C. K. Jung, E. H. Low, R. P. Thun, D. H. Miller, M. Willutzky, J.M. Weiss, D. Nitz, R. Debonte, G. Bonvicini, L. E. Price, D. E. Wood, H. A. Neal, S. W. Gray, D. I. Meyer, D. Errede, J. W. Chapman, J. S. Loos, L. K. Rangan, T. Trinko, P. Kooijman, K. K. Gan, Carl W. Akerlof, P. Baringer, Harold Ogren, D. Blockus, M. Valdata-Nappi, E. I. Shibata, I. Beltrami, R. L. McIlwain, S. Abachi, J. Schlereth, B. Musgrave, B. Cork, K. Sugano, D. R. Rust
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Popis: Results are reported on a high statistics study of Bhabha scattering at 29 GeV in the polar angle region, |cos θ| < 0.55. The data are consistent with the standard model, and measure vector and axial-vector coupling constants of gv2 = 0.03 ± 0.09 and ga2 = 0.46±0.14. Limits on the QED-cutoff parameters are Λ+ > 154 GeV and Λ- > 220 GeV. Lower limits on scale parameters of composite models are in the range 0.9-2.8 TeV. The partial width of a hypothetical spin-zero boson decaying to e+e- has an upper limit which varies from 6 to 57 MeV corresponding to a boson mass in the range 45-80 GeV/c2. © 1986.
Databáze: OpenAIRE