Observation of the radiative decayJψ→e+e−γ

Authors :: M. Church
M. M. Macri
Nadia Pastrone
Sandro Palestini
S. Trokenheim
A. Gianoli
S. Passaggio
G. Rinaudo
C. M. Ginsburg
G. Govi
Roberto Calabrese
T. A. Armstrong
James E. Fast
Giorgio Borreani
M. F. Weber
M. Fabbri
S. Pordes
R. Ray
M. Martini
F. Marchetto
M. Savrie
M. Masuzawa
Y. Zhang
E. Menichetti
A. Buzzo
A. J. S. Smith
J. Zhao
S. J. Werkema
W. Marsh
M. Sozzi
J. L. Rosen
J. Marques
John Peoples
D. Dimitroyannis
Eleonora Luppi
Fabrizio Petrucci
A. Migliori
P. F. Dalpiaz
M.G. Pia
C. Patrignani
M. Mandelkern
A. Ceccucci
Raymond A. Lewis
R. Mussa
Cristina Biino
B. Roccuzzo
A. Hahn
D. Broemmelsiek
M. Hasan
G. Zioulas
A. M. Majewska
Marco Pallavicini
R. Cester
K. E. Gollwitzer
D. Bettoni
V. Bharadwaj
Mauro Marinelli
J. D. Reid
J. Schultz
G. A. Smith
P. A. Rapidis
M. Sarmiento
K. K. Seth
A. Santroni
S. Hsueh
Source :: Physical Review D. 54:7067-7070
Publication Year :: 1996
Publisher :: American Physical Society (APS), 1996.
Abstract: We report the first observation of the (radiative) decay Jψ→e+e−γ. Our data are from an experiment in which Jψ is formed in antiproton-proton annihilations. The observed rate is consistent with a QED calculation based on final state radiation. Our measurement gives a branching ratio for this mode of (8.8±1.3±0.4)×10−3 for γ energy>100 MeV.

Subjects :: Nuclear physics
Physics
Nuclear and High Energy Physics
Branching fraction
Radiative transfer
Radiative decay
Mode (statistics)
High Energy Physics::Experiment
Radiation
Nuclear Experiment
Energy (signal processing)

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