Spectral content of isoscalar nucleon form factors
نویسندگان
چکیده
منابع مشابه
Spectral Content of Isoscalar Nucleon Form Factors
The nucleon strange vector and isoscalar electromagnetic form factors are studied using a spectral decomposition. The KK̄ contribution to the electric and magnetic radii as well as the magnetic moment is evaluated to all orders in the strong interaction using an analytic continuation of experimental KN scattering amplitudes and bounds from unitarity. The relationship between non-resonant and res...
متن کاملKK̄ - Continuum and Isoscalar Nucleon Form Factors
We analyse the isoscalar vector current form factors of the nucleon using dispersion relations. In addition to the usual vector meson poles, we account for the K ¯ K-continuum contribution by drawing upon a recent analytic continuation of KN scattering amplitudes. For the Pauli form factor all strength in the φ region is already given by the continuum contribution, whereas for the Dirac form fa...
متن کاملSpectral functions of isoscalar scalar and isovector electromagnetic form factors of the nucleon at two-loop order
We calculate the imaginary parts of the isoscalar scalar and isovector electromagnetic form factors of the nucleon up to two-loop order in chiral perturbation theory. Particular attention is paid on the correct behavior of Im σN (t) and Im GE,M (t) at the two-pion threshold t0 = 4mπ in connection with the non-relativistic 1/M -expansion. We recover the well-known strong enhancement near thresho...
متن کاملNucleon Electroweak Form Factors: Analysis of Their Spectral Functions
We investigate the imaginary parts of the nucleon electromagnetic and axial form factors close to threshold in the framework of heavy baryon chiral perturbation theory. For the isovector electromagnetic form factors, we recover the well known strong enhancement near threshold. For the isoscalar ones, we show that there is no visible enhancement due to the three–pion continuum. This justifies th...
متن کاملRelations between isoscalar charge form factors of two- and three-nucleon systems.
Theoretical predictions for the deuteron and the isoscalar trinucleon charge form factors are compared. Correlations between them are found. Linear relations hold for the position of the diffraction minimum and for the position and height of the secondary maximum. The linear relation for the diffraction minimum misses the experimental data.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review C
سال: 1999
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.60.045205