Hernan Castillo et al JHEP03(2005)012 doi:10.1088/1126-6708/2005/03/012
Electromagnetic nucleon form factors from QCD sum rules
Hernan Castillo1,2, Cesareo A. Dominguez3 and Marcelo Loewe1
Show affiliationsThe electromagnetic form factors of the nucleon, in the space-like region, are determined from three-point function Finite Energy QCD Sum Rules. The QCD calculation is performed to leading order in perturbation theory in the chiral limit, and to leading order in the non-perturbative power corrections. The results for the Dirac form factor, F1(q2), are in very good agreement with data for both the proton and the neutron, in the currently accessible experimental region of momentum transfers. This is not the case, though, for the Pauli form factor F2(q2), which has a soft q2-dependence proportional to the quark condensate 
0|
q|0
.
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E-print Number: hep-ph/0302271
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- PACS
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12.38.Bx Perturbative calculations
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- Dates
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Issue 03 (March 2005)
Received 24 January 2005, accepted for publication 2 March 2005
Published 21 March 2005
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Electromagnetic nucleon form factors from QCD sum rules
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