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Publikováno v:
EPJ Web of Conferences, Vol 199, p 01015 (2019)
Pion production in nucleon-nucleon collisions is tightly connected with the issue of dibaryons. After having established the existence of the narrow dibaryon resonance d* (2380) with I(JP) = 0(3+) by two-pion production and elastic proton-neutron sca
Autor:
Victor Mokeev
Publikováno v:
EPJ Web of Conferences, Vol 241, p 03003 (2020)
Exclusiveπ+π-pphoto- and electroproduction data from CLAS have considerably extended the information on the spectrum and structure of nucleon resonances. The data from theπ+π-pandNπchannels have provided results on the electrocouplings of most r
Autor:
Konstantin Ottnad, Harvey B. Meyer, Tim Harris, Georg von Hippel, Hartmut Wittig, Jonas Wilhelm
Publikováno v:
EPJ Web of Conferences, Vol 175, p 06026 (2018)
We report on an analysis of the average quark momentum fraction of the nucleon and related quantities using Nf = 2 + 1 Wilson fermions. Computations are performed on four CLS ensembles covering three values of the lattice spacing at pion masses down
Autor:
F. Scozzi
Publikováno v:
EPJ Web of Conferences, Vol 137, p 05023 (2017)
EPJ Web Conf.
12th Conference on Quark Confinement and the Hadron Spectrum
12th Conference on Quark Confinement and the Hadron Spectrum, Aug 2016, Thessaloniki, Greece. pp.05023, ⟨10.1051/epjconf/201713705023⟩
EPJ Web Conf.
12th Conference on Quark Confinement and the Hadron Spectrum
12th Conference on Quark Confinement and the Hadron Spectrum, Aug 2016, Thessaloniki, Greece. pp.05023, ⟨10.1051/epjconf/201713705023⟩
International audience; The main goal of the High Acceptance Di-Electron experiment (HADES) at GSI is the study of hadronic matter in the 1-3.5 GeV/nucleon incident energy range. HADES results on e+ e− production in proton-nucleus reactions and in
Autor:
R. Longo
Publikováno v:
EPJ Web of Conferences, Vol 137, p 05013 (2017)
The COMPASS experiment at CERN took the polarised Drell-Yan data in 2015. The muon pairs originating from 190 GeV/ c pion collisions with polarised protons provide a way of accessing the transverse momentum dependent parton distribution functions of
Autor:
Ulrich Mosel
Publikováno v:
EPJ Web of Conferences, Vol 134, p 03004 (2017)
We review the achievements of the project B.5 , that deals with the calculation of in-medium properties of vector mesons and an analysis of their experimental signals, with a particular emphasis on the ω photoproduction data from CBELSA/TAPS. Other
Autor:
S. Costanza
Publikováno v:
EPJ Web of Conferences, Vol 142, p 01008 (2017)
The A2 Collaboration at MAMI (Mainz) carried out new measurements of the helicity dependence of the total inclusive photo-absorption cross section and of the partial cross sections for several reaction channels on the proton and on the neutron in the
Autor:
Foka, Y., Ruiz De Elvira Carrascal, Jacobo, Kovalenko, V., Hoferichter, M., Brambilla, N., Kubis, B., Meißner, U.-G.
Publikováno v:
EPJ Web of Conferences, Vol 137, p 01014 (2017)
Meißner, U.-G.; Ruiz de Elvira Carrascal, Jacobo; Hoferichter, M.; Kubis, B.; Foka, Y.; Brambilla, N.; Kovalenko, V. (22 March 2017). Roy–Steiner-equation analysis of pion–nucleon scattering. EPJ web of conferences, 137(01014), 01014. EDP Sciences 10.1051/epjconf/201713701014
Meißner, U.-G.; Ruiz de Elvira Carrascal, Jacobo; Hoferichter, M.; Kubis, B.; Foka, Y.; Brambilla, N.; Kovalenko, V. (22 March 2017). Roy–Steiner-equation analysis of pion–nucleon scattering. EPJ web of conferences, 137(01014), 01014. EDP Sciences 10.1051/epjconf/201713701014
Low-energy pion–nucleon scattering is relevant for many areas in nuclear and hadronic physics, ranging from the scalar couplings of the nucleon to the long-range part of two-pion-exchange potentials and three-nucleon forces in Chiral Effective Fiel
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c5f38bef39fd3ff2f9939adc20c560b
Autor:
J. Gegelia
Publikováno v:
EPJ Web of Conferences, Vol 199, p 01005 (2019)
Recent calculations of the pion-nucleon scattering in covariant baryon chiral perturbation theory with explicit delta resonances are presented. Two-loop results of the widths of the Δ and Roper resonances are discussed in the framework of an effecti
Autor:
Daniel Kupelwieser, Wolfgang Schweiger
Publikováno v:
EPJ Web of Conferences, Vol 113, p 05006 (2016)
We study the electromagnetic structure of the nucleon within a hybrid constituent-quark model that comprises, in addition to the $3q$ valence component, also a $3q$+$\pi$ non-valence component. To this aim we employ a Poincar\'e-invariant multichanne