Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 9
Book Description
Nucleon- Antinucleon Annihilation Dynamics
Author: Nucleon-antinucleon Annihilation Dynamics
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Recent progress towards a microscopic understanding of nucleon- antinucleon N/ovr N/ annihilation is reviewed. We consider statistical models, the constraints imposed by SU(2) or SU(3) flavor symmetry and the spin-flavor-color dependence of effective operators for the creation/destruction of quark-antiquark (Q/ovr Q/) pairs in N/ovr N/ annihilation processes. The importance of dynamical selection rules is emphasized as a means of revealing the underlying reaction mechanism. 15 refs., 1 fig.
The Antinucleon-nucleon Interaction at Low Energy
Author: Eberhard KlemptMicroscopic Approaches to Nucleon-antinucleon Annihilation
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The problem of nucleon-antinucleon (N anti N) annihilation is discussed in terms of the underlying quark-gluon dynamics of QCD. It is shown how recently observed selection rules exert a strong constraint on the effective quark-antiquark (Q anti Q) creation/destruction operator which enters in the annihilation process. The data on two meson modes suggest that a Q anti Q operator with one gluon quantum numbers is inadequate, and that a strong coupling approach to the treatment of the gluonic degrees of freedom is more appropriate. 25 refs., 1 fig.
Nucleon-antinucleon Interaction
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The current status of our understanding of the low energy nucleon-antinucleon (N anti N) interaction is reviewed. We compare several phenomenological models which fit the available N anti N cross section data. The more realistic of these models employ an annihilation potential W(r) which is spin, isospin and energy dependent. The microscopic origins for these dependences are discussed in terms of quark rearrangement and annihilation processes. It is argued that the study of N anti N annihilation offers a powerful means of studying quark dynamics at short distances. We also discuss how one may try to isolate coherent meson exchange contributions to the medium and long range part of the N anti N potential. These pieces of the N anti N interaction are calculable via the G-parity transformation from a model for the NN potential; their effects are predicted to be seen in N anti N spin observables, to be measured at LEAR. The possible existence of quasi-stable bound states or resonances of the anti N plus one or more nucleons is discussed, with emphasis on few-body systems. 42 references.
Nucleon Antinucleon Annihilation Into Two Mesons
Author: Milan Paul LocherMicroscopic Approaches to Nucleon-antinucleon Annihilation
Author: Nucleon antinucleon annihilation into two mesons
Author: M. P. LocherResonance Model in Nucleon-antinucleon Annihilation
Author: Germinal Cocho GilPublisher:
ISBN:
Category : Particles (Nuclear physics)
Languages : en
Pages :
Book Description
Antinucleon Physics
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Some of the recent data from LEAR, Brookhaven, and KEK on low and medium energy interactions of antinucleons (anti N) with nucleons (N) are reviewed and interpreted. Emphasis is on elastic and charge exchange scattering, total cross sections, and studies of anti NN annihilation, with particular focus on the emerging evidence for broad resonances and/or bound states of the anti NN system and the selection rules which reveal the quuark-gluon dynamics of the annihilation process. 69 refs., 8 figs.