We critically evaluate the isovector Goldberger-Miyazawa-Oehme ~GMO! sum rule for forward pN scattering using the recent precision measurements of pp and pd scattering lengths from pionic atoms. Weâ€¦ (More)

Properties of scalarâ€“isoscalar mesons are analysed in an unitary model using separable interactions in three decay channels: Ï€Ï€ , KK and an effective 2Ï€2Ï€. We obtain different solutions by fittingâ€¦ (More)

We critically evaluate the isovector GMO sumrule for the charged Ï€NN coupling constant using recent precision data from Ï€ âˆ’ p and Ï€ âˆ’ d atoms and with careful attention to systematic errors. From theâ€¦ (More)

Royâ€™s equations, which incorporate crossing symmetry of the Ï€Ï€ scattering amplitudes, are used to resolve the present ambiguity between two solutions for the scalar-isoscalar phase shifts below 1â€¦ (More)

The Coulomb-like backward peak of the np scattering differential cross section is due to one-pion exchange. Extrapolation to the pion pole of precise data should allow to obtain the value of theâ€¦ (More)

Properties of scalarâ€“isoscalar mesons are analysed in an unitary model using separable interactions in three decay channels: Ï€Ï€ , KK and an effective 2Ï€2Ï€. We obtain different solutions by fittingâ€¦ (More)

The authors review 15 cases of acute oesophageal obstruction arising from food (meat) or mucilage (3 cases). Obstruction was usually observed in the lower third of the oesophagus whereas in casesâ€¦ (More)

Royâ€™s equations are used to check if the scalar-isoscalar Ï€Ï€ scattering amplitudes fitted to experimental data fulfill crossing symmetry conditions. It is shown that the amplitudes describing theâ€¦ (More)

The lightest hadronic atoms offer a chance to test hadron-nucleon scattering amplitudes at and just below the thresholds. This energy region is of special interest when quasibound states exist in theâ€¦ (More)

Scalar-isoscalar mesons are studied using an unitary model in three channels: Ï€Ï€, KK and an effective 2Ï€2Ï€. All the solutions, fitted to the Ï€Ï€ and KK data, exhibit a wide f0(500), a narrow f0(980)â€¦ (More)