21 research outputs found
Meson exchange formalism and the definition of delta functions
It is shown that in the simple context of the elementary one-meson exchanges, the use of the "improper" delta "functions" could lead to the physically correct results. The same results were obtained by involving limiting values of the integrals over "proper" functions, thus providing the examples of the sequences connected with delta "functions". That formulation of sequences of integrals emerged automatically from the physical considerations concerning hypernuclear processes
Formalizam izmjene mezona i definicija delta funkcije
It is shown that in the simple context of the elementary one-meson exchanges, the use of the "improper" delta "functions" could lead to the physically correct results. The same results were obtained by involving limiting values of the integrals over "proper" functions, thus providing the examples of the sequences connected with delta "functions". That formulation of sequences of integrals emerged automatically from the physical considerations concerning hypernuclear processes.Pokazujemo da u okviru elementarnih jedno-mezonskih izmjena, upotreba ānepravihā delta āfunkcijaā može davati fiziÄki ispravne rezultate. Postigli smo iste rezultate uz primjenu graniÄnih vrijednosti integrala preko āpravihā funkcija, i tako pripremili primjere nizova povezanih s delta āfunkcijamaā. Ta formulacija nizova integrala sama proizlazi iz fiziÄkih razmatranja hipernuklearnih procesa
Hypernuclear potentials and the pseudoscalar meson exchange contribution
The pieces of the hypernuclear strangeness violating potential due to the pseudoscalar meson exchanges are derived using methods which were successfully applied to hyperon nonleptonic decays. The estimates are tested by comparison with measured hyperon nonleptonic decay amplitudes. All isospin changes āI = 1/2 and āI = 3/2 are included in the derived potential. All computational methods used are reviewed and described in detail
Hypernuclear potentials and the pseudoscalar meson exchange contribution
The pieces of the hypernuclear strangeness violating potential due to the pseudoscalar meson exchanges are derived using methods which were successfully applied to hyperon nonleptonic decays. The estimates are tested by comparison with measured hyperon nonleptonic decay amplitudes. All isospin changes and are included in the derived potential. All calculational methods used are reviewed and described in detail
Slabi mezonski vrhovi i hipernukleonski potencijal
This paper is a continuation of an earlier paper on hypernuclear potentials. A novel derivation of the hypernuclear strangeness-violating potential due to the pseudoscalar meson exchanges is presented. Comparison with the earlier method shows that the theoretical uncertainty is less than 30%. Relative signs of pseudoscalar meson exchanges and vector (axial vector) exchanges are discussed in detail. Additional comments on the nonrelativistic approximation are included.Ovaj je Älanak nastavak ranijeg Älanka o hipernuklearnim potencijalima. Predstavljamo nov izvod hipernuklearnog potencijala koji krÅ”i stranost a posljedica je izmjene pseudoskalarnih mezona. Usporedba s ranijom metodom pokazuje da je teorijska netoÄnost manja od 30%. Raspravljaju se podrobno relativni predznaci izmjena pseudoskalarnih mezona i vektorskih (aksijalno vektorskih) izmjena. Daju se dodatne napomene o nerelativistiÄkom približenju
Hipernuklearni potencijali i doprinos izmjene pseudoskalarnih mezona
The pieces of the hypernuclear strangeness violating potential due to the pseudoscalar meson exchanges are derived using methods which were successfully applied to hyperon nonleptonic decays. The estimates are tested by comparison with measured hyperon nonleptonic decay amplitudes. All isospin changes āI = 1/2 and āI = 3/2 are included in the derived potential. All computational methods used are reviewed and described in detail.Izvodimo dijelove hipernuklearnog potencijala koji krÅ”i stranost zbog izmjene pseudoskalarnih mezona primjenom metoda koje su uspjeÅ”no primijenjene za hiperonske neleptonske raspade. Ocjene se provjeravaju usporedbom s mjerenim amplitudama neleptonskih raspada hiperona. Sve su promjene izospina, āI = 1/2 i āI = 3/2, ukljuÄene u izvedeni potencijal. Podrobno opisujemo sve raÄunalne metode
Weak meson vertices and the hypernuclear potential
This paper is a continuation of an earlier paper on hypernuclear potentials. A novel derivation of the hypernuclear strangeness-violating potential due to the pseudoscalar meson exchanges is presented. Comparison with the earlier method shows that the theoretical uncertainty is less than 30%. Relative signs of pseudoscalar meson exchanges and vector (axial vector) exchanges are discussed in detail. Additional comments on the nonrelativistic approximation are included