scholarly journals Electromagnetic form factor of the pion in the field-theory-inspired approach

2011 ◽  
Vol 83 (11) ◽  
Author(s):  
N. N. Achasov ◽  
A. A. Kozhevnikov
Keyword(s):  
Field Theory ◽  
Form Factor ◽  
Electromagnetic Form Factor

scholarly journals PION FORM FACTOR AND REACTIONS e+e− → ωπ0 AND e+e− → π+π−π+π− AT ENERGIES UP TO 2 – 3 GEV IN THE MANY-CHANNEL APPROACH

2014 ◽  
Vol 35 ◽  
pp. 1460409
Author(s):  
N. N. ACHASOV ◽  
A. A. KOZHENIKOV
Keyword(s):  
Field Theory ◽  
Form Factor ◽  
Electromagnetic Form Factor ◽  
Good Description ◽  
Axial Vector ◽  
Pion Form Factor ◽  
Babar Data ◽  
Pion Electromagnetic Form Factor ◽  
The Many ◽  
Pion Electromagnetic Form

Using the field-theory-inspired expression for the pion electromagnetic form factor Fπ, a good description of the data in the range -10 < s < 1 GeV2 is obtained upon taking into account the pseudoscalar-pseudoscalar (PP) loops. When the vector-pseudoscalar (VP) and the axial vector-pseudoscalar (AP) loops are taken into account in addition to the PP ones, a good description of the BABAR data on the reaction e+e− → π+π− is obtained at energies up to 3 GeV. The inclusion of the VP and AP loops demands the treatment of the reactions e+e− → ωπ0 and e+e− → π+π−π+π−. This task is performed with the SND data on ωπ0 production and the BABAR data on π+π−π+π− production, both in e+e− annihilation, by taking into account ρ(770) and the heavier ρ(1450), ρ(1700), and ρ(2100) resonances. The problems arising from including of the VP and AP loops are pointed out and discussed.

Electromagnetic Form Factor of the Pion

1970 ◽  
Vol 24 (6) ◽  
pp. 294-296 ◽  
Author(s):  
Ira S. Gerstein ◽  
Kurt Gottfried ◽  
Kerson Huang
Keyword(s):  
Form Factor ◽  
Electromagnetic Form Factor

scholarly journals Recoil Polarization Measurements of the Proton Electromagnetic Form Factor Ratio toQ2=8.5  GeV2

2010 ◽  
Vol 104 (24) ◽  
Author(s):  
A. J. R. Puckett ◽  
E. J. Brash ◽  
M. K. Jones ◽  
W. Luo ◽  
M. Meziane ◽  
...  
Keyword(s):  
Form Factor ◽  
Electromagnetic Form Factor ◽  
Recoil Polarization ◽  
Polarization Measurements ◽  
Factor Ratio
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