Abstract
The NN form factor gNN(q2) is obtained from a quenched lattice QCD calculation of the pseudoscalar form factor gP(q2) of the proton with pion pole dominance. We find that gNN(q2) is well fitted with a monopole form which agrees with the Goldberger-Treiman relation. The monopole mass is determined to be 0.75 0.14 GeV, which shows that gNN(q2) is rather soft. The extrapolated N coupling constant gNN=12.7 2.4 is quite consistent with the phenomenological values. We also compare gNN(q2) with the axial form factor gA(q2) to check pion dominance in the induced pseudoscalar form factor hA(q2) vis-à-vis the chiral Ward identity.
Original language | English |
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Pages (from-to) | 2172-2175 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 74 |
Issue number | 12 |
DOIs | |
State | Published - 1995 |
ASJC Scopus subject areas
- General Physics and Astronomy