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Durham e-Theses
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Resonance production and decays

Vlassopulos, Spyridon Demetres (1974) Resonance production and decays. Doctoral thesis, Durham University.



This thesis deals with some phenomena connected with resonance production or formation, at low energies, and/or their subsequent decay. It is subdivided into two almost independent parts: The first part (chapter II) is concerned with W/M production in π – N scattering, and a possible charge asymmetry in their decay, we explicitly calculate the asymmetry for the reaction π (^+) p → π (^+) π (^-) π (^o) Ϫ (^++) caused by interference of w production with uncorrelated 3N production. Assuming C-invariance for the W-decay, we find that interference terms with a coherent 3N background cannot explain the whole of the asymmetry experimentally observed. The second part (chapters III and IV), deals with K-N scattering. In chapter III, examining the possible Lorentz-invariant, parity-conserving couplings of the t-channel exchanges to the external particles, and afterwards reggeizing them, we are able to construct simple models for the processes KN → KD and KN → K (^o) N, which are capable of giving a satisfactory fit to the data over a wide range of energies. For completeness, a simple model for elastic KN scattering is also presented. In chapter IV we use the results of chapter III as input into a K-matrix machinery, from which we get a unitary isoscalar KN scattering model, analytically solvable, which reproduces several basic features of recent phase shift analyses, in particular a wide J (^P) exotic resonance Z (_o) (1780)

Item Type:Thesis (Doctoral)
Award:Doctor of Philosophy
Thesis Date:1974
Copyright:Copyright of this thesis is held by the author
Deposited On:18 Sep 2013 15:41

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