Observation of the radiative decay J/psi->e(+)e(-)gamma

被引:16
作者
Armstrong, TA
Bettoni, D
Bharadwaj, V
Biino, C
Borreani, G
Broemmelsiek, D
Buzzo, A
Calabrese, R
Ceccucci, A
Cester, R
Church, M
Dalpiaz, P
Dalpiaz, PF
Dimitroyannis, D
Fabbri, M
Fast, J
Gianoli, A
Ginsburg, CM
Gollwitzer, K
Govi, G
Hahn, A
Hasan, M
Hsueh, S
Lewis, R
Luppi, E
Macri, M
Majewska, AM
Mandelkern, M
Marchetto, F
Marinelli, M
Marques, J
Marsh, W
Martini, M
Masuzawa, M
Menichetti, E
Migliori, A
Mussa, R
Palestini, S
Pallavicini, M
Passaggio, S
Pastrone, N
Patrignani, C
Peoples, J
Petrucci, F
Pia, MG
Pordes, S
Rapidis, P
Ray, R
Reid, J
Rinaudo, G
机构
[1] FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510
[2] UNIV FERRARA,I-44100 FERRARA,ITALY
[3] IST NAZL FIS NUCL,I-44100 FERRARA,ITALY
[4] IST NAZL FIS NUCL,I-16146 GENOA,ITALY
[5] UNIV GENOA,I-16146 GENOA,ITALY
[6] UNIV CALIF IRVINE,IRVINE,CA 92717
[7] NORTHWESTERN UNIV,EVANSTON,IL 60208
[8] UNIV TURIN,I-10125 TURIN,ITALY
[9] IST NAZL FIS NUCL,I-10125 TURIN,ITALY
来源
PHYSICAL REVIEW D | 1996年 / 54卷 / 11期
关键词
D O I
10.1103/PhysRevD.54.7067
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report the first observation of the (radiative) decay J/psi-->e(+)e(-)gamma. Our data are from an experiment in which J/psi 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) x 10(-3) for gamma energy > 100 MeV.
引用
收藏
页码:7067 / 7070
页数:4
相关论文
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