231 citations · 2.4k across the 78 of their papers we have counts for
15 papers · 1 filter
Spectrum of the excited and baryons in a relativistic chiral quark model
E. M. Tursunov, S. Krewald
The spectrum of the SU(2) flavor baryons is studied in the frame of a relativistic chiral quark potential model based on the one-pion and one-gluon exchange mechanisms. It is argue…
Primakoff effect in eta-photoproduction off protons
A. Sibirtsev, J. Haidenbauer, S. Krewald +1
We analyse data on forward eta-meson photoproduction off a proton target and extract the eta to gamma gamma decay width utilizing the Primakoff effect. The hadronic amplitude that…
Proton-proton scattering above 3 GeV/c
A. Sibirtsev, J. Haidenbauer, H. -W. Hammer +2
A large set of data on proton-proton differential cross sections, analyzing powers and the double polarization parameter A_NN is analyzed employing the Regge formalism. We find tha…
Charmed Exotics
G. Bali, A. Denig, S. I. Eidelman +5
These are the mini-proceedings of the CHARMEX workshop. The meeting focused on recent developments in charm spectroscopy, especially on the possible role of the states that do not…
Neutral pion photoproduction at high energies
A. Sibirtsev, J. Haidenbauer, S. Krewald +2
A Regge model with absorptive corrections is employed in a global analysis of the world data on the reactions gamma p -> pi0 p and gamma n -> pi0 n for photon energies from 3 to 18…
Backward pion photoproduction
A. Sibirtsev, J. Haidenbauer, F. Huang +2
We present a systematic analysis of backward pion photoproduction for the reactions gamma p -> pi0 p and gamma p -> pi+ n. Regge phenomenology is applied at invariant collision ene…
Pion-nucleon charge-exchange amplitudes above 2 GeV
F. Huang, A. Sibirtsev, S. Krewald +3
The amplitudes for the pion-nucleon charge exchange reaction of the Karlsruhe-Helsinki and the George-Washington-University partial wave analyses are compared with those of a Regge…
Subleading contributions to the width of the D_{s0}*(2317)
Feng-Kun Guo, Christoph Hanhart, Siegfried Krewald +1
We construct the effective chiral Lagrangian involving the D--mesons and Goldstone bosons at next-to-leading order taking into account strong as well as electromagnetic interaction…
Hadronic-loop induced mass shifts in scalar heavy-light mesons
Feng-Kun Guo, Siegfried Krewald, Ulf-G. Meissner
We calculate the mass shifts of heavy-light scalar mesons due to hadronic loops under the assumption that these vanish for the groundstate heavy-light mesons. The results show that…
KKbar photoproduction from protons
A. Sibirtsev, J. Haidenbauer, S. Krewald +2
We study the contribution of the Drell mechanism driven by K^+ and K^- exchange to the reaction gamma N -> KKbar N. Our calculation implements the full KN and KbarN reaction amplit…
Near threshold enhancement of the ppbar mass spectrum in J/Psi decay
A. Sibirtsev, J. Haidenbauer, S. Krewald +2
We investigate the nature of the near-threshold enhancement in the ppbar invariant mass spectrum of the reaction J/Psi -> gamma ppbar reported recently by the BES Collaboration. Us…
New results on the limit for the width of the exotic Theta^+ resonance
A. Sibirtsev, J. Haidenbauer, S. Krewald +1
We investigate the impact of the Θ^+(1540) resonance on differential and integrated cross sections for the reaction K^+d{\to}K^0pp, where experimental information is available at k…
Hadron Physics at COSY
A. Gillitzer, C. Hanhart, V. Kleber +4
The workshop 'Hadron Physics at COSY' held from July 7th to July 10th 2003 in Bad Honnef brought together experimentalists and theoreticians from various fields of hadron physics t…
Lifetime of Kaonium
S. Krewald, R. H. Lemmer, F. P. Sassen
The kaon--antikaon system is studied in both the atomic and the strongly interacting sector. We discuss the influence of the structures of the and the mesons…
Meson model for f_0(980) production in peripheral pion-nucleon reactions
F. P. Sassen, S. Krewald, J. Speth
The Juelich model for pion-pion-scattering, based on an effective meson-meson Lagrangian is applied to the analysis of the S-wave production amplitudes derived from the BNL E852 ex…