Zobrazeno 1 - 10
of 38
pro vyhledávání: '"J. W. Darewych"'
Autor:
P Biswas, J W Darewych
Publikováno v:
Canadian Journal of Physics. 76:283-293
A relativistic coupled channel formalism is presented for the description of a quasi-bound three-body state.The annihilation of a particleparticleantiparticle system into a particle and a single quantum is studied in the scalar Yukawa model, in w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dea9f9df75c43131cc8467eeff84cb89
https://doi.org/10.1139/p98-009
https://doi.org/10.1139/p98-009
Publikováno v:
Journal of Mathematical Physics. 38:3908-3924
We investigate a variational approach to the study of two-particle bound states in quantum field theory. The scalar Yukawa model, in which scalar “nucleons” interact via “meson” exchange, is considered. A variational trial state that contains
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf02e3a5665ff81ff4bbc8705f8e8666
https://doi.org/10.1063/1.532078
https://doi.org/10.1063/1.532078
Autor:
J W Darewych, L Di Leo
Publikováno v:
Journal of Physics A: Mathematical and General. 29:6817-6841
We point out that the Coulomb part of the QED Hamiltonian in the Coulomb gauge has exact two-fermion eigenstates, provided that the wavefunction satisfies a Dirac-like (or Breit-like) equation. This equation, which describes the relative motion of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::442486ee8aa4c2ab9c0ba76b798d2544
https://doi.org/10.1088/0305-4470/29/21/015
https://doi.org/10.1088/0305-4470/29/21/015
Publikováno v:
Journal of Physics G: Nuclear and Particle Physics. 21:1167-1182
The Hamiltonian variational method is used to derive relativistic fermion-antifermion (NN) wave equations with interactions mediated by a neutral scalar (or pseudoscalar) ( pi 0) field. A simple mod NN>+ mod NN pi 0>+ mod pi 0 pi 0> Fock-space ansatz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8ea300c87fd216361822c065346635a
https://doi.org/10.1088/0954-3899/21/9/002
https://doi.org/10.1088/0954-3899/21/9/002
Publikováno v:
Hyperfine Interactions. 89:319-324
The calculation of the angular correlation of two-photon annihilation radiation for thermalized positrons colliding with simple molecules, particularly molecular hydrogen and nitrogen, is discussed using a one-state approximation with polarization po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a42f3dbc843cc32955e2a924159e0228
https://doi.org/10.1007/bf02064516
https://doi.org/10.1007/bf02064516
Autor:
J. W. Darewych, A. Duviryak
Publikováno v:
Scopus-Elsevier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adfaa7cfc1785e14495026ee4f67cc8b
https://doi.org/10.30970/jps.15.1101
https://doi.org/10.30970/jps.15.1101
Autor:
Eckehard Sch�ll, J. W. Darewych
Publikováno v:
Foundations of Physics. 23:1631-1634
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3be7f12b6d18c1134657b968faac90e1
https://doi.org/10.1007/bf00732370
https://doi.org/10.1007/bf00732370
Autor:
J. W. Darewych, I. Schlifer
Publikováno v:
Journal of Mathematical Physics. 33:2557-2561
Rigorous, calculable bounds to the absolute value of the second‐order remainder term, which is usually neglected in variational scattering calculations, are derived for a wide class of potentials.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6cfb3c5e8367232ac04e0e4a600a0845
https://doi.org/10.1063/1.529575
https://doi.org/10.1063/1.529575
Autor:
A S Ghosh, J W Darewych
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 24:L629-L633
A tractable optical potential method in which the Ps formation channel is included explicitly is developed for positron-atom scattering using an integral approach in momentum space. The method is suitable at medium energies. A model calculation is ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e70104d7a0837a4b9a675fb20140178
https://doi.org/10.1088/0953-4075/24/23/013
https://doi.org/10.1088/0953-4075/24/23/013
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 24:3507-3515
The n=2 excited state capture cross sections in e+-H2 scattering have been calculated using the first Born approximation. The integrated and differential capture cross sections are predicted in the energy range 30-1000 eV. The total Ps formation cros
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8667f6ae92766fc5678b4a4fc0987543
https://doi.org/10.1088/0953-4075/24/15/018
https://doi.org/10.1088/0953-4075/24/15/018