A Review of N $$\overline N$$ Annihilation Mechanisms

The antinucleon–nucleon interaction at low energy: Annihilation dynamics

“…Note that the enhancement of high-mass mesons is qualitatively equivalent to the pion suppression that was found necessary by Green and collaborators [310,312]. Schematically, annihilation producesqq pairs in some quantum numbers.…”

“…In particular, neglecting the 3 D 1 admixture into the 3 S 1 wave function sometimes changes the results by an order of magnitude. It was already noted by Green et al [310,312] that the 3 P 0 model requires an orbital momentum between the annihilating quark and antiquark. For an overall S-wave, this is provided by departures from the harmonic-oscillator behaviour of the wave function 2 .…”

“…One gets an exactly separable potential (8.26) acting between an initial NN wave function F ( r) and a final mesonic wave function F ( r ′ ), in contrast with the local character of optical potentials used in current phenomenological pictures. Green et al [310,331] and Ihle et al [329] went a little further and studied to what extent quark rearrangement can describe a large fraction of the observed annihilation cross-section. The predicted order of magnitude is reasonable, at least in the framework of simple constituent models.…”

“…A serious warning by Green et al (see, e.g., [310]), is that if initial-state interactions are taken seriously with our current ideas on nuclear forces, there are ample transition amplitudes NN ↔ N * N + c.c., or NN ↔ N * N * , with at least one baryon or antibaryon being a spin (N * = ∆), orbital or radial excitation of the nucleon. Similarly strange-meson production can proceed via a ΛΛ doorway or other hyperon-antihyperon intermediate states.…”

Judicial Resources and the Public Trust Doctrine: A Powerful Tool of Environmental Protection?

“…109 In R (Miller) v Secretary of State for Exiting the European Union 110 the suggestion was roundly refuted by the U.K. Supreme Court, but as the Daily Mail intuits and Professor Green explains, when formal constitutionalism threatens to turn them into "enemies of the people," they should remind themselves that "Parliamentary sovereignty is an institutional device, helpful where it secures important values, but a hindrance when it does not." 111 Whatever the outcome of the Brexit negotiations, the UK will, at least for the time being, remain a member of the Council of Europe and a signatory to the European Convention on Human Rights. While it is true that neither the Convention nor the Additional Protocols cover any environmental rights or any interest in the preservation of the environment, there are some indications of a developing right to life jurisprudence that can encompass, at least a duty to protect life against environmental disaster.…”