منابع مشابه
Production and Decay of Eta-mesic Nuclei
Using the Green function method, binding effects on produced η-mesons in the two-stage reaction γ + A → N + η + (A − 1) → N + (πN) + (A − 2) are studied. The energy spectrum of the correlated πN pairs which arise from decays of η’s inside the nucleus is strongly affected by an attractive η-nucleus optical potential. Its resonant behavior gives a clear signal of formating intermediate η-mesic nu...
متن کاملMeasurement of prominent eta-decay branching fractions.
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. Th...
متن کاملCharge Asymmetry in the Muonic Decay of the Kz"
This result, obtained at the Stanford Linear Accelerator Center (SIX), is a prima facie demonstration of CP non-invariance in Kz" decay. It is consistent with theoretical expectations based upon an analysis of experimental data which has been obtained since the first such demonstration by Christenson, Cronin, Fitch and Turlay. (1) The analysis of KzO decay in terms of parameters characterizing ...
متن کاملStudy of the charmless inclusive B ->eta ' X decay
G. Bonvicini, D. Cinabro, M. Dubrovin, S. McGee, A. Bornheim, E. Lipeles, S. P. Pappas, A. Shapiro, W. M. Sun, A. J. Weinstein, R. A. Briere, G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, N. E. Adam, J. P. Alexander, K. Berkelman, V. Boisvert, D. G. Cassel, P. S. Drell, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, R. S. Galik, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley...
متن کاملEta and Eta’ Physics
This talk describes the reasons why η and η decays are an interesting topic of study for both theory and experiment. The main part discusses the results of the recent calculation of η → 3π at two-loop order in ChPT. Some puzzling aspects of the results compared to earlier dispersive calculations are highlighted. I also like to remind the reader of the use of η and η decays for studying the anom...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2019
ISSN: 0550-3213
DOI: 10.1016/j.nuclphysb.2019.114638