arXiv subjects

Richard A. Arndt

Publications and source records attributed to Richard A. Arndt.

4 recordsLinked to original sources

arXiv2000

Nucleon-nucleon elastic scattering to 3 GeV

A partial-wave analysis (PWA) of NN elastic scattering data has been completed. This analysis covers an expanded energy range, from threshold to a laboratory kinetic energy of 3 GeV, in order to include recent elastic pp polarized scattering measurements performed at SATURNE II. Results of the energy-dependent fit are compared with single-energy solutions and Saclay amplitudes obtained via the direct-reconstruction approach. We also comment on the status of Eps1 in the low-energy region.

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arXiv1998

Stability of the E2/M1 ratio at the T-matrix pole

We show how the stability of the E2/M1 ratio, evaluated at the T-matrix pole, can be understood given a much wider variation at the K-matrix pole.

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arXiv1995

The Fubini-Furlan-Rossetti sum rule reexamined

We review the status of a Fubini-Furlan-Rossetti sum rule for the photoproduction of pions from nucleons, indicating how well this sum rule is satisfied using a recent analysis of pion photoproduction data. Our results are discussed in light of a recent paper comparing the Gerasimov-Drell-Hearn and spin-dependent polarizability sum rules.

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arXiv1994

An updated analysis of NN elastic scattering data to 1.6 GeV

An energy-dependent and set of single-energy partial-wave analyses of $NN$ elastic scattering data have been completed. The fit to 1.6~GeV has been supplemented with a low-energy analysis to 400 MeV. Using the low-energy fit, we study the sensitivity of our analysis to the choice of $πNN$ coupling constant. We also comment on the possibility of fitting $np$ data alone. These results are compared with those found in the recent Nijmegen analyses. (Figures may be obtained from the authors upon request.)

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