Brazilian relativistic O(q4) two-pion exchange nucleon-nucleon potential: parametrized version
نویسندگان
چکیده
منابع مشابه
Parity-violating two-pion exchange nucleon-nucleon interaction
We calculate in chiral perturbation theory the parity-violating two-pion exchange nucleon-nucleon potentials at leading one-loop order. At a distance of r = m−1 π ≃ 1.4 fm they amount to about ±16% of the parity-violating 1π-exchange potential. We evaluate also the parity-violating effects arising from 2π-exchange with excitation of virtual ∆(1232)-isobars. These come out to be relatively small...
متن کاملEquivalence of Nonstatic Two-Pion-Exchange Nucleon-Nucleon Potentials
Off-shell aspects of the one-pion-exchange potential and their relationship to different forms of the nonstatic (subleading-order) chiral two-pion-exchange nucleon-nucleon potential are discussed. Various types of off-shell behavior are categorized and numerous examples are given. Recently derived potentials based on chiral approaches are supplemented by a rather general form of the two-pion-ex...
متن کاملCharge-Independence Breaking in the Two-Pion-Exchange Nucleon-Nucleon Force
Charge-independence breaking due to the pion-mass difference in the (chiral) two-pion-exchange nucleon-nucleon force is investigated. A general argument based on symmetries is presented that relates the charge-symmetric part of that force to the proton-proton case. The static potential linear in that mass difference is worked out as an explicit example by means of Feynman diagrams, and this con...
متن کاملTwo Pion Production in Nucleon-nucleon Collisions at Intermediate Energies
We have developed a model for the NN → NNππ reaction and evaluated cross sections for the different charged channels. The low energy part of those channels where the pions can be in an isospin zero state is dominated by N∗(1440) excitation, driven by an isoscalar source followed by the decay N∗ → N(ππ) S−wave . At higher energies, and in channels where the pions are not in T=0, ∆ excitation mec...
متن کاملPerturbative renormalizability of chiral two-pion exchange in nucleon-nucleon scattering
We study the perturbative renormalizability of chiral two-pion exchange for singlet and triplet channels within effective field theory, provided that the one-pion exchange piece of the interaction has been fully iterated. We determine the number of counterterms/subtractions needed to obtain finite results when the cutoff is removed, resulting in three counterterms for the singlet channel and si...
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: Brazilian Journal of Physics
سال: 2007
ISSN: 0103-9733
DOI: 10.1590/s0103-97332007000100023