12 papers
Pion Correlations and Resonance Effects in ppbar Annihilation to 4pi0 at Rest
O. Kortner, M. P. Locher, V. E. Markushin +2
We study pi0pi0 correlations in the exclusive reaction ppbar -> 4pi0 at rest with complete reconstruction of the kinematics for each event. The inclusive distribution shows a dip a…
Higher Order Two Step Mechanisms in Nucleon Antinucleon Annihilation and the OZI Rule
S. von Rotz, M. P. Locher, V. E. Markushin
We evaluate three meson doorway mechanisms for nucleon-antinucleon annihilation at rest for the first time. Detailed results are presented for the final state phi pi0 originating f…
Structure of the Light Scalar Mesons from a Coupled Channel Analysis of the s-wave pi pi - k kbar Scattering
V. E. Markushin, M. P. Locher
The analysis of the poles of the scattering amplitude is shown to favour a dynamical origin of the sigma meson: it is created by a strongly attractive interaction in the…
Dispersion relation analysis of the neutral kaon regeneration amplitude in carbon
CPLEAR Collaboration, M. P. Locher, V. E. Markushin
We apply a forward dispersion relation to the regeneration amplitude for kaon scattering on 12C using all available data. The CPLEAR data at low energies allow the determination of…
OZI Rule Violation in p pbar Annihilation into phi pi pi by Two Step Processes
V. E. Markushin, M. P. Locher
The phi pi+ pi- production in p pbar annihilation at rest is strongly enhanced by a two step mechanism with intermediate K Kbar pi pi states. The relative yield of the phi producti…
Structure of f0(980) from a Coupled Channel Analysis of S-wave pi pi Scattering
M. P. Locher, V. E. Markushin, H. Q. Zheng
A coupled channel model is used to study the nature of the f0(980) resonance. It is shown that the existence of two poles close to KKbar threshold, as found in many data fits and c…