Symmetry breaking in radiative meson decays

1970 ◽  
Vol 68 (3) ◽  
pp. 459-468 ◽  
Author(s):  
D. F. Greenberg

1973 ◽  
Vol 8 (11) ◽  
pp. 3875-3881 ◽  
Author(s):  
Steven B. Berger ◽  
Bernard T. Feld


1989 ◽  
Author(s):  
Milton Dean Slaughter ◽  
S. Oneda


2019 ◽  
Vol 199 ◽  
pp. 01023
Author(s):  
Wencheng Yan

The BESIII experiment has accumulated the world’s largest data samples of 1.3 billion J/ψ events and 0.45 billion ψ(3686) events, which provide a unique opportunity to investigate light meson decays. The η and η′ decays are sensitive tools for investigations of π − π and η − π interactions, symmetry breaking, and serve as a test of chiral perturbation theory. In recent years considerable results on η and η′ decays were achieved at the BESIII experiment. In this proceeding, we present the significant progresses on amplitude analyses of Dalitz decays η' → 3π,η' → ηππ, and radiative decay η' → γπ+π−, η' → γγπ0. Additionally, the $a_0^0\left( {980} \right) - {f_0}\left( {980} \right)$ mixing is an important probe to the nature of those two lightest scalar mesons. The first observation of $a_0^0\left( {980} \right) - {f_0}\left( {980} \right)$ mixing is also presented, which will help to improve the understanding of the nature of $a_0^0\left( {980} \right)$ and f0(980).



2012 ◽  
Vol 2012 (6) ◽  
Author(s):  
Thorsten Feldmann ◽  
Soumitra Nandi ◽  
Amarjit Soni


1999 ◽  
Vol 14 (27) ◽  
pp. 4331-4345 ◽  
Author(s):  
R. DELBOURGO ◽  
DONGSHENG LIU ◽  
M. D. SCADRON

We show that all abnormal parity three-body meson interactions can be adequately described by quark loops, evaluated at zero external momentum, with couplings determined by U(Nf) symmetry. We focus primarily on radiative meson decays which involve one pseudoscalar. The agreement with experiment for nonrare decays is surprisingly good and requires very few parameters, namely the coupling constants gπqq and gρqq and some mixing angles. This agreement extends to some three-body decays that are dominated by pion pairs in a P-wave state.



1968 ◽  
Vol 39 (3) ◽  
pp. 696-701 ◽  
Author(s):  
Akira Kanazawa ◽  
Tetsuro Sakuma


1979 ◽  
Vol 2 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Norma M. Chase ◽  
Michael T. Vaughn


1976 ◽  
Vol 61 (2) ◽  
pp. 175-177 ◽  
Author(s):  
N. Chase ◽  
M.T. Vaughn


1987 ◽  
Vol 184 (4) ◽  
pp. 348-352 ◽  
Author(s):  
J.W. Durso


1992 ◽  
Vol 382 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Howard Georgi ◽  
Fumiyo Uchiyama ◽  
Atsushi Yamada


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