Nucleon mass difference and off-shell form factors

1981 ◽  
Vol 66 (4) ◽  
pp. 450-458 ◽  
Author(s):  
I. Kimel

1961 ◽  
Vol 124 (4) ◽  
pp. 1203-1204 ◽  
Author(s):  
H. Katsumori ◽  
M. Shimada


1967 ◽  
Vol 158 (5) ◽  
pp. 1600-1607
Author(s):  
J. Rix
Keyword(s):  


1973 ◽  
Vol 49 (5) ◽  
pp. 1755-1757
Author(s):  
Kazo Nakazawa


1959 ◽  
Vol 37 (12) ◽  
pp. 1339-1343
Author(s):  
F. A. Kaempffer

Within the framework of quantum electrodynamics there exists the possibility of a derivative coupling between source and photon field, referred to as eΛ-charge, which has no classical analogue. For calculations the usual graph technique can be used, provided the factor eγμ contributed by each vertex in a conventional graph is replaced by ieΛkμ, where Λ is a length characteristic of the new interaction. Using as cutoff the nucleon mass M one finds for a bare source of electronic mass m the self-energy in second order to be Λm/m ≈ 200, if Λ−1 ≈ 60 M. It is argued that the large mass difference between muon and electron may be due to this effect, assuming muon and electron to differ only in that the muon has eΛ-charge whereas the electron has not. An estimate is made of the muon–muon scattering cross section caused by the presence of eΛ-charge on the muon, and it is found that the existence of this derivative coupling may have escaped observation.



2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
A. Upadhyay ◽  
J. P. Singh

We estimate a possibleη′gluonic contribution to the self-energy of a nucleon in an effective theory. The couplings of the topological charge density to nucleons give rise to OZI violatingη′-nucleon interactions. The one-loop self-energy of nucleon arising due to these interactions is studied using a heavy baryon chiral perturbation theory. The divergences have been removed using appropriate form factors. The nontrivial structure of the QCD vacuum has also been taken into account. The numerical results are sensitive to the choice of the regulator to a nonnegligible extent. We get the total contribution to the nucleon mass coming from its interaction with the topological charge densityδmtot≅-(2.5–7.5)% of the nucleon mass.



1970 ◽  
Vol 65 (4) ◽  
pp. 597-606 ◽  
Author(s):  
A. Komatsuzawa ◽  
K. Nakazawa ◽  
R. Sugano
Keyword(s):  


1973 ◽  
Vol 7 (11) ◽  
pp. 3372-3379 ◽  
Author(s):  
J. Sucher ◽  
C. H. Woo




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