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39 papers · 1 filter
The nonmesonic weak decay of the hypertriton
J. Golak, K. Miyagawa, H. Kamada +5
The nonmesonic decay of the hypertriton is calculated based on a hypertriton wavefunction and 3N scattering states, which are rigorous solutions of 3-body Faddeev equations using r…
Nucleon Form Factors in a Relativistic Three-Quark Model
M. A. Ivanov, M. P. Locher, V. E. Lyubovitskij
We report the calculation of electromagnetic form factors of nucleons within a relativistic three-quark model with Gaussian shape for the nucleon-quark vertex. The allowed region f…
Pion Absorption Cross Section for ^2H and ^3He in the Delta-Isobar Region: A Phenomenological Connection
H. Kamada, M. P. Locher, T. -S. H. Lee +4
The absorption of π^+ on ^3He in the -region is evaluated with exact inclusion of the final state interaction among the three emerging protons. The absorption is described by a…
Radiative Corrections to ZZ->ZZ in the Electroweak Standard Model
A. Denner, S. Dittmaier, T. Hahn
The cross-section for ZZ->ZZ with arbitrarily polarized Z bosons is calculated within the electroweak Standard Model including the complete O(alpha) corrections. We show the numeri…
A Precise Determination of the Pion-Nuclear Coupling Parameter from Weak Processes in ^3He
Nimai C. Mukhopadhyay, K. Junker
We utilize precise weak interaction experiments on atomic muon capture and beta decay in the A = 3 nuclei, and take into account the effects of nuclear "anomalous thresholds" to ex…
The fermion-loop scheme for finite-width effects in e^+ e^- annihilation into four fermions
W. Beenakker, A. Denner, S. Dittmaier +5
We describe the gauge-invariant treatment of the finite-width effects of W and Z bosons in the fermion-loop scheme and its application to the six-fermion (LEP2) processes e^- e^+ -…