학술논문
Measurement of the two-photon width of the η′(958)
Document Type
article
Author
Butler, F; Boyer, J; Gidal, G; Abrams, G; Amidei, D; Baden, AR; Gold, MS; Goldhaber, G; Golding, L; Haggerty, J; Herrup, D; Juricic, I; Kadyk, JA; Levi, ME; Nelson, ME; Rowson, PC; Schellman, H; Schmidke, WB; Sheldon, PD; Trilling, GH; Wood, DR; Riles, K; Perl, ML; Barklow, T; Boyarski, A; Burchat, PR; Burke, DL; Dorfan, JM; Feldman, GJ; Gladney, L; Hanson, G; Hayes, K; Hollebeek, RJ; Innes, WR; Jaros, JA; Karlen, D; Klein, SR; Lankford, AJ; Larsen, RR; LeClaire, BW; Lockyer, NS; Lüth, V; Ong, RA; Richter, B; Yelton, JM; Schaad, T
Source
Physical Review D. 42(5)
Subject
Language
Abstract
Using 203 pb-1 of data collected by the Mark II detector at the SLAC storage ring PEP, we have measured the radiative width of the for quasireal photons. The width is separately measured in the three reactions e+e-e+e-0+-,0; e+e-e+e-0+-; 0+-(0,), and e+e-e+e-0, giving a statistically weighted average two-photon width of=4.57±0.25±0.44 keV. As a byproduct of the study of the decay mode, we also measured the two-photon decay width of the a2(1320) as a2(1320)=1.03±0.13±0.21 keV. © 1990 The American Physical Society.