3 citations · 6 across the 6 of their papers we have counts for
11 papers
Recent issues in hadron spectroscopy
J. -M. Richard
A brief survey is presented of recently discovered hadrons, some of them presumably demonstrating a new kind of internal structure. This includes : spin-singlet quarkonium, mesons…
Safe domain and elementary geometry
J. -M. Richard
A classical problem of mechanics involves a projectile fired from a given point with a given velocity whose direction is varied. This results in a family of trajectories whose enve…
General Constraints on Spin Observables, Applications to Antiproton Proton to Antilambda Lambda and to Polarized Quark Distributions
Xavier ARTRU, Jean-Marc RICHARD
We review the density matrix formalism and the positivity conditions for general multiple spin asymmetries, taking as an example the case antiproton + proton -> antiLambda + Lambda…
Borromean binding
Jean-Marc Richard
A review is first presented of the Hall--Post inequalities relating -body to -body energies of quantum bound states. These inequalities are then applied to delimit, in th…
Double Charm Physics
Jean-Marc Richard
We review the weak-decay and spectroscopy properties of baryons with two charmed quarks. We also present the convergent speculations on exotic mesons with two…
Borromean molecules
Jean-Marc Richard
For some values of the constituent masses m_i, the hydrogen-like molecule (m_1^+,m_2^+,m_3^-,m_4^-) is stable with respect to spontaneous dissociation into two neutral atoms, while…