By Martin Faessler (auth.), D. V. Bugg (eds.)

This assembly on Hadron Spectroscopy and the Confinement challenge came about from June 27 to July eight, 1995. the 1st 4 days have been at Queen Mary and Westfield university, London and the final six on the collage university of Swansea, Wales. the cause of the cut up websites used to be a query of accomodating the fifty four scholars and 12 teachers. even though, it was once loved through all involved, delivering the chance to pattern the nightlife of London one week and revel in the pleasant coastal quarter round Swansea the subsequent week. The assembly instantly preceded the Hadron '95 convention in Manchester. The contents of this quantity run approximately parallel to the order of the lectures. Martin Faessler's short and that of Madjid Boutemeur used to be to check experimental tech­ niques in addition to physics effects. we've got attempted to check the entire components that are at the moment lively experimentally. this suggests often gentle Meson Spectroscopy. despite the fact that, Simon Capstick gave us a welcome overview of Baryon Spectroscopy and the arriving CEBAF application. this can be a chance to thank NATO for his or her beneficiant monetary aid, and in addition the 2 host associations for great coordination and an relaxing stay.

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There are six different types "flavors" of quark, which have different masses, electric charges and weak interactions but identical strong interactions. 8 colors of gluons in a manner described by the QCD Lagrangian. ,A~ + gr bc A~A~ . V. Bugg, Plenum Press, New York, 1996 37 transformations. (These are mathematically analogous to the Pauli matrices in the isospin-conserving pion-nucleon interaction q,iw . if. LA" except that in QED there is only a single "color" degree of freedom. \~. A~ - 0I'Aa(x) (QED) (5) (QED); (QCD) + grbcAb(x)A~ (QCD).

First, under parity P we transform o -+ -0, which with the parity of (_1)L of the spherical harmonics and the intrinsic negative parity of a fermion-antifermion pair gives Plqq(J,L,S)) = (-l)L+1lqq(J,L,S)) (31) Another useful quantum number is C-parity; the C operator changes particles into antiparticles and vice versa, without changing any other state labels. Thus for example (32) If this operator is diagonal, the phase is called C-parity. Since C switches quarks and antiquarks, it is only diagonal on states with q and q of the same flavor.

E. its symmetry for interchange of the particle indices. I8 shows some interesting cases of J pc, G eigenstates decaying into K K*. These patterns can be used in order to deduce the G parity from the observed interference pattern if J Pc is known or assumed to be known. If the final state under consideration is not a C eigenstate, the G eigenstates are still useful since G is conserved in the strong interaction. e. KO K-, KO* K-* and KO K-*, KO* K-. The G eigenstates can be constructed as above.

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