اشترك بالحزمة الذهبية واحصل على وصول غير محدود شمرا أكاديميا
تسجيل مستخدم جديدIs the Pentaquark the Only Justification for Research on KN Physics ?
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P.M. Gensini
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The talk is intended to motivate the use of DA$Phi$NE--2 running at the $phi$ peak as an intense, clean source of low--momentum charged and neutral kaons. It covers a few open problems still unsolved after more than twenty--five years and the physics (some of it still novel) that could be learned only in this way. And, of course, the answer to the above question is {sl NO}.
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We discuss the differences between several partial-wave analysis formalisms used in the construction of three-body decay amplitudes involving fermions. Specifically, we consider the decay Lambda_b -> psi p K- , where the hidden charm pentaquark signa
l has been reported. We analyze the analytical properties of the amplitudes and separate kinematical and dynamical singularities. The result is an amplitude with the minimal energy dependence compatible with the S-matrix principles.
Interpretation of the B(E2) values at energies higher the first backbending indicates that the maximum boson of IBM has to increase with energy and spin.
The dispersive determination of $pi{Y}Sigma$ coupling constants ($Y = Lambda, Sigma$) and the implications for low-energy $bar{K}N$ analysis are discussed. (Presented by G. Violini at the 7th Int. Symp. on Meson-Nucleon Physics and the Structure of t
he Nucleon, MENU 97, Vancouver, B.C., July 28th - August 1st, 1977).
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