The time-like E.M. form factors of the neutron: First measurement at adone

A. Antonelli,R. Baldini,M. Bertani,M. Biagini,V. Bidoli, C. Bini,T. Bressani,R. Calabrese, R. Cardarelli,R. Carlin,C. Casari,L. Cugusi,P. Dalpiaz,G. DeZorzi,A. Feliciello,P. Dalpiaz,M. Ferrer,P. Gauzzi,P. Gianotti,E. Luppi,S. Marcello, A. Masoni,R. Messi,M. Morandin,L. Paoluzi, E. Pasqualucci,G. Pauli, F. Petrucci,M. Posocco,M. Preger,G. Puddu,M. Reale,L. Santi, R. Santonico,P. Satori,M. Savrie,S. Serci,M. Spinetti,S. Tessaro,C. Voci

Quark Cluster DynamicsLecture Notes in Physics（1992）

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摘要

Preliminary results of experiment FENICE performed at Adone e + e 2212 storage ring in Frascati are presented here. The J/ braching ratios have been determined. At q 2 = 4.4GEV 2 a new measurement of the proton form factor has been perormed and at q 2 = 4.0 GeV 2 a first, preliminary value of the neutron form factor G n =(0.42±0.06) is obtained, assuming |G E | |G M |.

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关键词

Form Factor, Storage Ring, Branching Ratio, Electromagnetic Form Factor, Candidate Event

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