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6 papers · 2 filters
Production of eta mesons in nucleon-nucleon collisions
V. Baru, A. M. Gasparyan, J. Haidenbauer +3
A microscopic calculation of near-threshold eta-meson production in the reaction NN -> NNeta is presented. It is assumed that the eta meson is produced via direct emission and via…
Positive pion absorption on 3He using modern trinucleon wave functions
S. Schneider, J. Haidenbauer, C. Hanhart +1
We study pion absorption on 3He employing trinucleon wave functions calculated from modern realistic NN interactions (Paris, CD Bonn). Even though the use of the new wave functions…
Complete next-to-leading order calculation for pion production in nucleon-nucleon collisions at threshold
C. Hanhart, N. Kaiser
Based on a counting scheme that explicitly takes into account the large momentum sqrt(M m_pi) characteristic for pion production in nucleon-nucleon collisions we calculate all diag…
Toy Model for Pion Production II: The role of three-particle singularities
A. Motzke, Ch. Elster, C. Hanhart
The influence of three-particle breakup singularities on s-wave meson production in nucleon-nucleon collisions is studied within the distorted wave Born approximation. This study i…
Theoretical understanding of pion production in nucleon-nucleon collisions - a status report
C. Hanhart
A status report is given for the current theoretical understanding of pion production close to threshold. In the first part of the talk predictions of a meson exchange model are co…
Aspects of a0-f0 mixing in the reaction pn->da0
A. E. Kudryavtsev, V. E. Tarasov, J. Haidenbauer +2
Some aspects of a0-f0 mixing effects in the reaction with perpendicular polarized proton beam are discussed. An angular--asymmetry parameter is defined t…