Details

Autor(en) / Beteiligte

• Lopez, A
• Mehrabyan, S
• Mendez, H
• Ramirez, J
• Miller, D H
• Sanghi, B
• Shipsey, I P J
• Xin, B
• Adams, G S
• Anderson, M
• Cummings, J P
• Danko, I
• Moziak, B
• Napolitano, J
• He, Q
• Insler, J
• Park, C S
• Thorndike, E H
• Yang, F
• Artuso, M
• Blusk, S
• Khalil, S
• Li, J
• Menaa, N
• Mountain, R
• Nisar, S
• Randrianarivony, K
• Sia, R
• Skwarnicki, T
• Wang, J C
• Bonvicini, G
• Cinabro, D
• Dubrovin, M
• Lincoln, A
• Asner, D M
• Edwards, K W
• Naik, P
• Briere, R A
• Ferguson, T
• Tatishvili, G
• Vogel, H
• Watkins, M E
• Rosner, J L
• Adam, N E
• Alexander, J P
• Cassel, D G
• Duboscq, J E
• 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
• Onyisi, P U E
• Patterson, J R
• Peterson, D
• Riley, D
• Ryd, A
• Sadoff, A J
• Shi, X
• Stroiney, S
• Wilksen, T
• Athar, S B
• Patel, R
• Yelton, J
• Rubin, P
• Eisenstein, B I
• Karliner, I
• Lowrey, N
• Selen, M
• White, E J
• Wiss, J
• Mitchell, R E
• Shepherd, M R
• Besson, D
• Cronin-Hennessy, D
• Gao, K Y
• Hietala, J
• Kubota, Y
• Klein, T
• Lang, B W
• Poling, R
• Scott, A W
• Zweber, P
• Metreveli, Z
• Seth, K K
• Tomaradze, A
• Ernst, J
• Ecklund, K M
• Severini, H
• Love, W
• Savinov, V

Titel

Measurement of prominent eta-decay branching fractions

Ist Teil von

• Physical review letters, 2007-09, Vol.99 (12), p.122001-122001, Article 122001

Ort / Verlag

United States

Erscheinungsjahr

2007

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• The decay psi(2S) --> etaJ/psi is used to measure, for the first time, all prominent eta-meson branching fractions with the same experiment in the same dataset, thereby providing a consistent treatment of systematics across branching fractions. We present results for eta decays to gamma gamma, pi(+)pi(-)pi(0), 3pi(0), pi(+)pi(-)gamma and e(+)e(-)gamma, accounting for 99.9% of all eta decays. The precision of several of the branching fractions and their ratios is improved. Two channels, pi(+)pi(-)gamma and e(+)e(-)gamma, show results that differ at the level of three standard deviations from those previously determined.