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pro vyhledávání: '"isobar model"'
We utilise an isobar model to investigate the $K^+ \Sigma^-$ photoproduction off a neutron in the resonance region. Except for the Born terms, we include high-spin (spin-3/2 and spin-5/2) nucleon resonances in the consistent formalism together with a
Externí odkaz:
http://arxiv.org/abs/2106.15199
Autor:
Kuznetsov, V. A., Polyakov, M. V.
We demonstrate that the explanation of the neutron anomaly around $W\sim 1685$MeV in $\gamma N\to \eta N$ reactions provided by the $\eta$MAID2018 isobar model is based on large violation of the flavour SU(3) symmetry in hadron interactions. This is
Externí odkaz:
http://arxiv.org/abs/1810.07713
Autor:
Tiator, L., Gorchtein, M., Kashevarov, V. L., Nikonov, K., Ostrick, M., Hadzimehmedovic, M., Omerovic, R., Osmanovic, H., Stahov, J., Svarc, A.
The isobar model EtaMAID has been updated with new and high precision data for eta and etaprime photoproduction on protons and neutrons from MAMI, ELSA, GRAAL and CLAS. The background is described in a recently developed Regge-cut model, and for the
Externí odkaz:
http://arxiv.org/abs/1807.04525
Autor:
Skoupil, D., Bydžovský, P.
Publikováno v:
Phys. Rev. C 97, 025202 (2018)
Exploiting the isobar model, kaon photo- and electroproduction on the proton in the resonance region comes under scrutiny. An upgrade of our previous model, comprising higher-spin nucleon and hyperon exchanges in the consistent formalism, was accompl
Externí odkaz:
http://arxiv.org/abs/1801.07466
Akademický článek
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Autor:
Skoupil, Dalibor1 skoupil@ujf.cas.cz, Bydžovský, Petr1, Cieplý, Aleš1, Petrellis, Dimitrios1, Zachariou, Nicholas2
Publikováno v:
EPJ Web of Conferences. 11/18/2022, Vol. 271, p1-4. 4p.
Publikováno v:
Phys.Rev.C82:035207,2010
Photoproduction of pi0-eta on protons in the energy range from threshold to 1.4 GeV is discussed. The data for representative angular distributions recently obtained at MAMI C are analyzed using an isobar model. The isobars considered are Delta(1232)
Externí odkaz:
http://arxiv.org/abs/1004.5240
Publikováno v:
Eur.Phys.J.A34:69-97,2007
The unitary isobar model MAID2007 has been developed to analyze the world data of pion photo- and electroproduction. The model contains both a common background and several resonance terms. The background is unitarized according to the K-matrix presc
Externí odkaz:
http://arxiv.org/abs/0710.0306
Autor:
Aznauryan, I. G.
Publikováno v:
Phys.Rev. C68 (2003) 065204
The contributions of the resonances $D_{13}(1520)$, $S_{11}(1535)$, $S_{11}(1650)$, $D_{15}(1675)$, $F_{15}(1680)$, $D_{13}(1700)$, $P_{11}(1710)$, $P_{13}(1720)$ to $\gamma p\to \eta p$ are found from the data on cross sections, beam and target asym
Externí odkaz:
http://arxiv.org/abs/nucl-th/0306079
Autor:
Aznauryan, I. G.
Publikováno v:
Phys.Rev. C67 (2003) 015209
Two approaches for analysis of pion photo- and electroproduction on nucleons in the resonance energy region are checked at $Q^2=0$ using the results of GWU(VPI) partial-wave analysis of photoproduction data. The approaches are based on dispersion rel
Externí odkaz:
http://arxiv.org/abs/nucl-th/0206033