منابع مشابه
Electroweak form factors of non-strange baryons
Abstract. We compute electroweak form factors of the nucleon and photon transition form factors of nonstrange baryon resonances up to the third resonance region in a model with instanton-induced interaction. The calculation is based on the Bethe-Salpeter equation for three light constituent quarks and is fully relativistic (U. Löring et al., Eur. Phys. J. A10, 309 (2001)). Static nucleon proper...
متن کاملElectromagnetic Form Factors of Baryons
Electromagnetic form factors of the nucleon and its excitations (baryon resonances) provide a powerful tool to investigate the structure of the nucleon. These form factors can be measured in electroproduction as a function of the four-momentum squared q = −Q of the virtual photon. In this contribution we present a simultaneous study of the elastic form factors of the nucleon and the transition ...
متن کاملStrange Decays of Nonstrange Baryons
The strong decays of excited nonstrange baryons into the final states ΛK, ΣK, and for the first time into Λ(1405)K, Λ(1520)K, Σ(1385)K, ΛK∗, and ΣK∗, are examined in a relativized quark pair creation model. The wave functions and parameters of the model are fixed by previous calculations of Nπ and Nππ, etc., decays. Our results show that it should be possible to discover several new negative pa...
متن کاملDetermination of the strange nucleon form factors.
The strange contribution to the electric and magnetic form factors of the nucleon is determined at a range of discrete values of Q^{2} up to 1.4 GeV^{2}. This is done by combining a recent analysis of lattice QCD results for the electromagnetic form factors of the octet baryons with experimental determinations of those quantities. The most precise result is a small negative value for the stran...
متن کاملStrange Form Factors in Neutrino Scattering
The determination of the strange quark contribution to the nucleonic axial and vector weak currents has raised large and continuous interest in theoretical and experimental physics, especially after the measurements of the polarised structure function g 1 of the proton, which indicated a non–zero contribution of the strange quark to the proton spin. In recent years, intermediate energy physics ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1997
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(97)01159-3