201 citations · 637 across the 20 of their papers we have counts for
22 papers
Comments on Baryon Transition Form Factors
Christoph Hanhart, Maxim Mai, Ulf-G. Meißner +1
We discuss in rather general terms the properties of space-like baryon transition form factors. In particular, we argue why these are necessarily complex-valued, what can be deduce…
Hadron Physics Opportunities at FAIR
J. G. Messchendorp, F. Nerling, P. Achenbach +103
This White Paper outlines a coordinated, decade-spanning programme of hadron and QCD studies anchored at the GSI/FAIR accelerator complex. Profiting from intense deuteron, proton a…
Polarization Observables and in the Reaction at CLAS
H. Jiang, S. Strauch, I. I. Strakovsky +3
Pion photoproduction in the reaction has been measured in the FROST experiment at the Thomas Jefferson National Accelerator Facility.…
Coupled-channel contributions to the GDH sum rule from the Jülich-Bonn approach
Carolin Schneider, Deborah Rönchen, Christoph Hanhart +1
We study the Gerasimov-Drell-Hearn (GDH) sum rule within a dynamical coupled-channel approach, the Jülich-Bonn model for light baryon resonances based on fits to an extensive data…
Nature of the states from compositeness criteria
Yu-Fei Wang, Chao-Wei Shen, Deborah Rönchen +3
Based on a coupled-channel approach, we investigate the structures of four states through compositeness criteria. Toward a more precise description of the states, we have obt…
Photoproduction of the Σ+ hyperon using linearly polarized photons with CLAS
CLAS Collaboration, L. Clark, B. McKinnon +4
Background: Measurements of the polarization observables Σ, P, T, Ox, Oz for the reaction γp {\rightarrow) KS0 Σ+ using a linearly polarized photon beam of energy 1.1 to 2.1 GeV ar…
Global Data-Driven Determination of Baryon Transition Form Factors
Yu-Fei Wang, Michael Döring, Jackson Hergenrather +5
Hadronic resonances emerge from strong interactions encoding the dynamics of quarks and gluons. The structure of these resonances can be probed by virtual photons parameterized in…
Inclusion of electroproduction data in a coupled channel analysis
M. Mai, J. Hergenrather, M. Döring +4
Exclusive electroproduction reactions provide an access to the structure of excited baryons. To extract electroproduction multipoles encoding this information, the Jülich-Bonn-Wash…
Nature of the and resonances via coupled-channel dynamics
Yu-Fei Wang, Ulf-G. Meißner, Deborah Rönchen +1
This work aims at determining the composition of certain and resonances, i.e. whether they are compact states formed directly by quarks and gluons, or hadronic molecules…
The reaction in a dynamical coupled-channel approach
Yu-Fei Wang, Deborah Rönchen, Ulf-G. Meißner +3
A refined investigation on light flavor meson-baryon scatterings is performed using a dynamical coupled-channel approach, the Jülich-Bonn model, that respects unitartiy and analyti…
Light baryon resonances from a coupled-channel study including photoproduction
Deborah Rönchen, Michael Döring, Ulf-G. Meißner +1
The Jülich-Bonn dynamical coupled-channel approach is extended to include photoproduction off the proton. Differential cross section and (double) polarization data for $K^+Σ^0…
Resonances in heavy meson - heavy baryon coupled-channel interactions
Zheng-Li Wang, Chao-Wei Shen, Deborah Rönchen +2
The interactions of are studied within the framework of a dynamical coupled-channel approach. A series of bound states and resonances w…
Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
Maxim Mai, Michael Döring, Carlos Granados +6
Pion and eta electroproduction data are jointly analyzed for the first time, up to a center-of-mass energy of 1.6 GeV. The framework is a dynamical coupled-channel model, based on…
Jülich-Bonn-Washington Model for Pion Electroproduction Multipoles
Maxim Mai, Michael Döring, Carlos Granados +5
Pion electroproduction off the proton is analyzed in a new framework based on a general parametrization of transition amplitudes, including constraints from gauge invariance and th…
The impact of photoproduction on the resonance spectrum
D. Rönchen, M. Döring, U. -G. Meißner
The Jülich-Bonn coupled-channel framework is extended to photoproduction. The spectrum of nucleon and resonances is extracted from simultaneous fits to several pion-indu…
Exploratory study of possible resonances in the heavy meson - heavy baryon coupled-channel interactions
Chao-Wei Shen, Deborah Rönchen, Ulf-G. Meißner +1
We use a unitary coupled-channel model to study the interactions. In our calculation, SU(3) flavor symmetry is applied to determine the coupling constan…
Correlations of Partial Waves for Multi-Reaction Analyses
M. Döring, J. Revier, D. Rönchen +1
In the search for missing baryonic resonances, many analyses include data from a variety of pion- and photon-induced reactions. For elastic scattering, however, usually the pa…
First Measurement of the Polarization Observable E in the Reaction up to 2.25 GeV
S. Strauch, W. J. Briscoe, M. Döring +165
First results from the longitudinally polarized frozen-spin target (FROST) program are reported. The double-polarization observable E, for the reaction , has…
Status of some P-wave baryon resonances and importance of inelastic channels
Volker D. Burkert, Hiroyuki Kamano, Eberhard Klempt +6
We analyze the current status of three P-wave baryon states , , and as given in the Review of Particles Physics (RPP). Since the e…
Photocouplings at the Pole from Pion Photoproduction
D. Rönchen, M. Döring, F. Huang +6
The reactions and are analyzed in a semi-phenomenological approach up to GeV. Fits to differential cross section and single and double polariza…
Coupled-channel dynamics in the reactions piN --> piN, etaN, KLambda, KSigma
D. Rönchen, M. Döring, F. Huang +6
Elastic piN scattering and the world data of the family of reactions pi^- p --> eta n, K^0 Lambda$, K^0 Sigma^0, K^+ Sigma^-, and pi^+ p --> K^+ Sigma^+ are described simultaneousl…
The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
M. Döring, C. Hanhart, F. Huang +3
Elastic pi N scattering and the reaction pi+ p --> K+ Sigma+ are described simultaneously in a unitary coupled-channels approach which respects analyticity. SU(3) flavor symmetry i…