Pion Effects in N and $$\varDelta $$ Masses and Strong Form Factors

Autor: Regina A. Schmidt, Willibald Plessas

Publikováno v: Recent Progress in Few-Body Physics ISBN: 9783030323561

Baryon resonances cannot be described realistically along \(\{QQQ\}\) configurations only. Here we present results for N and \(\varDelta \) masses with explicit pion contributions. We adhere to a coupled-channels formalism and construct a relativisti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f8ac9c2923d28ad97ee69644f23c8c1d
https://doi.org/10.1007/978-3-030-32357-8_109

Baryon Masses and Hadronic Decay Widths with Explicit Pionic Contributions

Autor: Wolfgang Schweiger, R. A. Schmidt, Willibald Plessas, L. Canton

Publikováno v: Few-Body Systems. 58

We report results from studies of baryon ground and resonant states by taking explicit mesonic degrees of freedom into account. We are following a relativistic coupled-channels approach relying on a Poincare-invariant mass operator in matrix form. Ge

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d49bcc07e8d015b534eb0722c903db4
https://doi.org/10.1007/s00601-016-1195-9

Flavor analysis of nucleon, $\Delta$, and hyperon electromagnetic form factors

Autor: Willibald Plessas, Martin Rohrmoser, Ki-Seok Choi

Publikováno v: Few Body Syst.
23rd European Conference on Few-Body Problems in Physics
23rd European Conference on Few-Body Problems in Physics, Aug 2016, Aarhus, Denmark. pp.83, ⟨10.1007/s00601-017-1243-0⟩
23rd European Conference on Few-Body Problems in Physics, Aug 2016, Aarhus, Denmark. Few Body Syst., 58 (2), pp.83, 2017, 〈10.1007/s00601-017-1243-0〉

International audience; By the analysis of the world data base of elastic electron scattering on the proton and the neutron (for the latter, in fact, on$^2H$ and$^3He$ ) important experimental insights have recently been gained into the flavor compos

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68ef7d744f41d2861dc7a5662812d4eb
https://hal.archives-ouvertes.fr/hal-01554669

Spectroscopy of Baryons as Relativistic Three-Quark Systems

Autor: Joseph P. Day, Willibald Plessas, Ki-Seok Choi

Publikováno v: Few-Body Systems. 54:329-332

We present results from a study of baryon spectral properties within a relativistic constituent-quark model. In particular, we demonstrate the performance of a universal quark model for all light-, strange-, and heavy-flavor baryons with regard to th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::784951a31a5b41548c952fb587268d00
https://doi.org/10.1007/s00601-012-0386-2

Covariant nucleon electromagnetic form factors from the Goldstone-boson-exchange quark model

Autor: S. Boffi, Marco Radici, William H. Klink, Willibald Plessas, R.F. Wagenbrunn

We present a study of proton and neutron electromagnetic form factors for the recently proposed Goldstone-boson-exchange constituent quark model. Results for charge radii, magnetic moments, and electric as well as magnetic form factors are reported.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e41848068a4fb390be1ee5c8f12e2b21
http://www.openaccessrepository.it/record/16862