Dielectron widths of the Gamma(1S,2S,3S) resonances

• Published in: Physical review letters 2006-03, Vol.96 (9), p.092003-092003
• Main Authors: Rosner, J L, Adam, N E, Alexander, J P, Berkelman, K, Cassel, D G, Duboscq, J E, Ecklund, K M, Ehrlich, R, Fields, L, Galik, R S, Gibbons, L, Gray, R, Gray, S W, Hartill, D L, Heltsley, B K, Hertz, D, Jones, C D, Kandaswamy, J, Kreinick, D L, Kuznetsov, V E, Mahlke-Krüger, H, Meyer, T O, Onyisi, P U E, Patterson, J R, Peterson, D, Phillips, E A, Pivarski, J, Riley, D, Ryd, A, Sadoff, A J, Schwarthoff, H, Shi, X, Stroiney, S, Sun, W M, Wilksen, T, Weinberger, M, Athar, S B, Avery, P, Breva-Newell, L, Patel, R, Potlia, V, Stoeck, H, Yelton, J, Rubin, P, Cawlfield, C, Eisenstein, B I, Karliner, I, Kim, D, Lowrey, N, Naik, P, Sedlack, C, Selen, M, White, E J, Wiss, J, Shepherd, M R, Besson, D, Pedlar, T K, Cronin-Hennessy, D, Gao, K Y, Gong, D T, Hietala, J, Kubota, Y, Klein, T, Lang, B W, Poling, R, Scott, A W, Smith, A, Dobbs, S, Metreveli, Z, Seth, K K, Tomaradze, A, Zweber, P, Ernst, J, Arms, K, Severini, H, Dytman, S A, Love, W, Mehrabyan, S, Savinov, V, Aquines, O, Li, Z, Lopez, A, Mendez, H, Ramirez, J, Huang, G S, Miller, D H, Pavlunin, V, Sanghi, B, Shipsey, I P J, Xin, B, Adams, G S, Anderson, M, Cummings, J P, Danko, I, Napolitano, J, He, Q, Insler, J, Muramatsu, H, Park, C S, Thorndike, E H
• Format: Article
• Language: English
• ISSN: 0031-9007

We determine the dielectron widths of the Gamma(1S), Gamma(2S), and Gamma(3S) resonances with better than 2% precision by integrating the cross section of e+e- -->Gamma over the e+e- center-of-mass energy. Using e+e- energy scans of the Gamma resonances at the Cornell Electron Storage Ring and measuring Gamma production with the CLEO detector, we find dielectron widths of 1.252+/-0.004(sigma(stat))+/-0.019(sigma(syst)) keV, 0.581+/-0.004+/-0.009 keV, and 0.413+/-0.004+/-0.006 keV for the Gamma(1S), Gamma(2S), and Gamma(3S), respectively.