Showing papers by "Robertus Timmermans published in 1999"
TL;DR: In this article, the chiral two-pion exchange component of the long-range π-pp interaction was studied in an energy-dependent partial-wave analysis and its presence and importance were demonstrated.
Abstract: The chiral two-pion exchange component of the long-range $\mathrm{pp}$ interaction is studied in an energy-dependent partial-wave analysis. We demonstrate its presence and importance and determine the chiral parameters ${c}_{i}$ ( $i\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1,3,4$). The values agree well with those obtained from pion-nucleon amplitudes.
125 citations
TL;DR: In this paper, an exclusive proton-proton bremsstrahlung measurement with polarized protons of 190 MeV was performed with unprecedented accuracy in a large part of the phase space.
Abstract: An exclusive proton-proton bremsstrahlung measurement has been performed with polarized protons of 190 MeV. Absolute cross sections and analyzing powers have been measured with unprecedented accuracy in a large part of the phase space. The data are compared with state-of-the-art theoretical calculations including higher-order off-shell effects, like the Delta isobar and meson-exchange currents. Surprisingly, the calculations are unable xo describe the data in detail.
18 citations
TL;DR: The criteria suggested by Welsh and Fearing to judge the validity of certain soft-photon amplitudes are examined in this paper, showing that some aspects of their analysis lead to incorrect conclusions.
Abstract: The criteria suggested by Welsh and Fearing to judge the validity of certain soft-photon amplitudes are examined. Some aspects of their analysis lead to incorrect conclusions. [copyright] [ital 1999] [ital The American Physical Society]
1 citations